Openwrt iptables rules. user configuration file, without any success.

Openwrt iptables rules Additionally the iptable command can be used to sort the rules differently and retrieve packet counts for matching rules. Basically, I want to achieve that every connection must use the I'm having problems getting port forwarding to work with OpenWrt 18. Basically, I want to achieve that every connection must use the Hi everyone, could anyone help me to convert the following iptables rule in a compatible persistent nftables rule for openwrt? iptables -t nat -A POSTROUTING -s 192. iptables -A input_lan_rule -m mac --mac-source MAC-ADDRESS -j DROP iptables -A forwarding_lan_rule -m mac --mac-source MAC-ADDRESS -j DROP. 18scoobz March 11, 2023 Hi I have no rules in my ipv4 firewall iptables chains except mwan3, but in my ipv6 chains all the stuff set in my firewall seems to be there. 0/24 ct state new logging prefix \"NHRP Multicast: \" group 2 accept Error: syntax error, unexpected prefix add rule filter OUTPUT oif gre1 log ip daddr 224. One side of a non-OpenWrt router is connected to a T-Mobile 5G gateway and the other side is connected to a Raspberry Pi for bypassing T-Mobile's data throttling. user file iptables -t mangle -A PREROUTING -i eth1 -j MARK --set-mark 10 root@repeater:~# iptables -L -vt mangle Chain PREROUTING (policy ACCEPT 28462 packets, 13M bytes) pkts bytes target prot opt in out source destination 34156 6014K MARK all -- **eth1** any anywhere anywhere MARK set 0xa I want to convert this rule into the For a long time now iptables has supported the ability to interpret rules using extensions to allow arbitrary ranges of IPs and ports to be specified in rules. Hi, I've configured the firewall to block everything and will add specific rules to allow certain scenarios e. iptables -t mangle -A POSTROUTING -j TTL --ttl-set so i just updated openwrt but it seems that the custom rules tab is gone in firewall settings, im trying to add this custom rule below but i don't know where to put it. 255. d/firewall restart <firewall_script_output> root@OpenWrt:~# iptables -L input_wan_rule Chain input_wan_rule (1 references) target prot opt source destination ACCEPT udp -- 10. For all of the features and documentation and helpful guidance on this website, there is no transitionary documentation between "How to Install" and, say, " SIP daemon for Lantiq devices with owsip. you can't just copy and paste the example from the manual, bruh i tried the uci way but the config was not creating the new iptables rule which i wrote down the UCI config. 5 doing so migrates from IPtables to NFTables. # Internal uci firewall chains are flushed and recreated on reload, so # put custom rules into the root chains e. It accepts the same UCI configuration syntax as fw3. this rules not worked but when i have changed to this one it worked. 189 Hey all, Trying to get into using nftables with the latest OpenWrt version. 14 -j DROP. Here is an example netfilter configuration bash script taken from the freifunk project. Unfortunately, fw4's nftable rules accept all forwarded traffic using ct status dnat accept and I don't see any way to disable that behavior. The rules are listed as they appear in the fw3 print listing. There I've recently switch my router firmware from Tomato to OpenWRT. x:5353 but with the latest openwrt, even with a build on iptables, the option to add that When an interface comes up, it creates a custom routing table and iptables rules. The vpn rules I used before are as follows, what command does nft use to replace it? iptables -t nat -A postrouting_wan_rule -j ACCEPT -m service dockerd starts, creates the docker0 bridge and all the other stuff (e. Yesterday I've added 3 firewall rules, to limit some mac addresses and they are working fine BUT somehow now also Supercell games On 18. Reference here. These rules seem to do the trick, but only when snort is not running. conf. x/16 -j SNAT --to-source I have in my firewall. Should they both be there? Ok, I'm working with an OpenWRT router. I'd prefer not to create 20 duplicate rules to implement this. I want to move it to 22. You're applying simplified host based iptables rules (and concepts) here. root@OPENWRT:~# iptables-save # Generated by iptables-save v1. A new routing table is created for each interface. Hi all, This might be a very stupid question but where can I view the logs of iptables rules? I created a rule like - iptables −t raw −A PREROUTING −d ip −j LOG to log packets going towards to that ip address. iptables -A OUTPUT -p icmp --icmp-type host-unreachable -j DROP 4. 168. 0 -j fw3 print is the main utility to inspect iptable rules. I believe it can be done using some root@OpenWrt:/# nft add chain ip filter OUTPUT { type filter hook input priority root@OpenWrt:/# nft add rule filter OUTPUT oif gre1 log ip daddr 224. My current openWRT is replaced by If you want to contribute to the OpenWrt wiki, please post HERE in the forum or ask on IRC for access. A friend uses fresh tomato firmware and this qos works perfect for this games. The non-OpenWrt router is for better wifi broadcasting. 0. That's why you get problems if you try to use old package selections. I want a new install of OpenWRT, with my current Firewall Rules. Even after executing the shell after committing the changes. 0 International I have read all three of the Guest WLAN articles in the Wiki: guest-wlan guest-wlan-webinterface Guest WiFi Configuration plus the DD-WRT wiki, plus several additional guest wifi tutorials and articles, but I haven't found a clear discussion of how to allow access to the Internet while simultaneously blocking access to the other subnets and the router itself. GitHub Gist: instantly share code, notes, and snippets. Like this：iptables -A POSTROUTING -o eth0 -s x. 03. firewall4 omits counters from some of the hardcoded rules in the ruleset. 8 on Fri Aug 16 13:02:50 2024 *mangle :PREROUTING ACCEPT Hello All, I have read through lots of posts about converting IPTables rules to NFtables rules and I am just stuck, obviously I am a noob trying to do something that I am not able to even being spoon fed lots of good information! Could someone please help by converting the following IPTables rules to nftables rules: iptables -t mangle -I PREROUTING -j TTL --ttl The passionate reader will ask “So what netfilter rules does this create?” iptables -t nat -A zone_wan_prerouting -p tcp -m tcp --dport 2222-m comment --comment "!fw3: The relevant traffic matches the DNAT conntrack state which is allowed to traverse zones by OpenWrt firewall, so no extra permissive rules are required. 0 r19685-512e76967f / LuCI openwrt-22. 0-rc1 is now on the download pages, so it'll start getting some early adopter attention (such as me). 03 branch git-22. Tried with: config rule option name 'Allow Samba Access' list dest_ip '192. # Put your custom iptables rules here, they will # be executed with each firewall (re-)start. (I'm not using ebtables afaik, ebtables -L shows no rules): ebtables-utils ebtables iptables-mod-physdev kmod-br-netfilter kmod-ebtables kmod I am new to openwrt and after installing luci-app-qos I am seeing a notification in the firewall configuration saying Legacy rules detected There are legacy iptables rules present on the system. I've managed to make it works with simple iptables rules (see below) but I think I'll move to nftables someday. 0/24 -j Hi all. The OpenVPN connection is established properly however: I can only route traffic from the server(new Openwrt instance) to client and not the other way around. 242' list src_ip '192. Not great, but OK. Make sure that it is executable. I've connected to the router via SSH, printed out the rules using iptables -S, placed the exact rules into the Custom Rules tab 0: from all lookup local 1: from all fwmark 0x1 lookup 100 ----> my transparent proxy rule 2: from all iif br-chmob lookup 80 -----> route specific lan to specific wan rule 3: from all iif pppoe-wan_chmob lookup 80 10000: from 192. 14 -m time --timestart Even after doing this I’m seeing a warning message in Luci-> Status -> Firewall about “Legacy rules detected, mixing nftables and iptables is discouraged” I’ve confirmed that these iptables rules are indeed created by tailscale. user like this: # This file is interpreted as shell script. I would like to permanently save the following firewall rule under my OpenWrt system with version 23. users that stopped working after the update, so I used iptables-translate to use the same rules for nftables, but I am having some problems and I am just figuring out what the problem might be. the NAT rules required for docker-proxy) but the docker I want to monitor everything passing through the WAN port (i. The loopback rule seems unnecessary, to accept traffic from its own interface I'm trying to enable a custom iptables rule in the /etc/firewall. I am sending packets from one of my devices to this ip and want to see the logged messages like in Tcpdump. Greetings from Stefan Harbich Raspberry Pi 4 Model B Rev 1. Reverse them, so first set an accept rule for specific traffic and after that, set the drop rule for broader Is there any way to set Daily or monthly bandwidth quota ( as in Gargoyle ) on LEDE as i have only 100GB ( download & Upload ) data plan i have WR940N V4 (EU) with LEDE 17. iptables -t nat -I PREROUTING -p tcp -d 192. 03 and later ships with firewall4 by default, which uses nftables as a backend. the iptables rules are created too (e. X to 23. 77528-487e58a On my firewall tab there is this warning; Legacy rules detected There are legacy iptables rules present on the system. 1 lookup 80 10000: from 100. x. If you want to contribute to the OpenWrt wiki, please post HERE in the forum or ask on IRC for access. 17 -d 10. Post here the following in preformatted text </> * Accessing OpenWrt CLI * Managing configurations * Managing packages * Managing services Introduction * This I just set up a 6in4 he. Everything was working fine. Now I wanted to monitor users as to how much internet they use during the day so I found this article on opkg install iptables-nft then iptables-translate "whatever iptables rule" will tell you the nft close ( * ) equivalent ( * ) as nftables is not 100% same as iptables it is an atttempt, not everything can be translated. I'm going to join Naftali on the opening point. Sadly I can not get the masquerading action work whereas pbr-iptables Version: 1. OpenWrt Forum How to set up an IPTABLES rule in nftables. 1-1 Description: According to #16818 and #17940 mwan3 is migrated to nftables, I have only a single basic port forward rule (tried to disable -A zone_wan_forward -m conntrack --ctstate DNAT -m comment --comment "!fw3: Accept port forwards" -j ACCEPT If such a rule is missing from the FORWARD chain, all port forwards will be blocked by the default forwarding policy, which in most cases is DROP or REJECT. 14 -m time --timestart 8:00 --timestop 18:30 -j ACCEPT. 0 International fw3 print dumps all the netfilter rules to stdout as a set of iptables directives. 50 ? LUCI sounds angry and put the field in I have the default OpenWrt firewall set up. I can't see any firewall rules: root@router:~# iptables-nft --list # Warning: iptables-legacy tables present, use iptables-legacy to see them Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target there seems to be a bug in UCI when applying firewall rules with both time and multiple weekdays specified. The station just has to listen on the Copy init. Tested firmware version: Raspberry Pi 4B 64bit Version 21. Can we create a script to do the same thing in Openwrt? I would like to configure my firewall so that it whitelists cross-zone FTP connections for some specific machines. Copy sysconfig/iptables and sysconfig/ip6tables to /etc/sysconfig/. 17 -p tcp --dport 80 -j DNAT --to-destination 192. 02 vm I have this custom rule: iptables -t nat -A POSTROUTING -j MASQUERADE iptables -t nat -I PREROUTING -i br-lan -p tcp --dport 53 -j Heyho I recently upgraded to the latest openwrt version and nftables. However, I would like to use iptables as I can use the multiport option to specify both HTTP and HTTPS in one rule. e. I've created a forwarding rule in LUCI, and the rule appears to be correctly transcribed into /etc/config/firewall, but the rule is getting lost somewhere deeper in the configuration system and seemingly isn't being loaded into iptables. get mail via pop3 from GMX. internet traffic) by duplicating all WAN traffic to a dedicated switch port. 254 --dport 80 -j DNAT --to-destination 192. so i just updated openwrt but it seems that the custom rules tab is gone in firewall settings, im trying to add this config rule option src 'wan' option dest 'lan' option proto 'tcp' option dest_port '22' option target 'ACCEPT' option name 'ACCEPT-SSH-WAN-LAN' fw3 UCI parses the rule to the following iptables rule (with some others for context, implicitly created). 02 to 22. I have another dual-stack cloud VPS with nginx configured to forward requests to above ddns domain name. I've entered it in the Firewall - Custom Rules section. 0/24 -j Hi all, is it possible to add an option when creating a traffic rule, to prepend it to the forward chain? Currently all rules are appended, resulting in not being able to give it the highes priority (in my case executing it before RELATED,ESTABLISHED general rule). Or you could provide the output of: ubus call system board it used to be, before there was an opkg package for AGH that it was possible to manually install AGH and then do this: iptables -t nat -A PREROUTING -i br-lan -p udp --dport 53 -j DNAT --to 10. 03, I use vpnc to connect co cisco firewall, and this VPN works perfectly but only on router, not on the local network the problem is I don't know how to convert this custom iptables firewall rules to nftables - I tried iptables-translate but the result do not work, vpn-VPN is the name of the interface with with Protocol: VPNC (CISCO 3000 (and nft add rule nat postrouting. ) and set the connection mark to the decimal value for the appropriate DSCP class; Check all inbound/outbound packets for connection marks which match DSCP class decimal values, and if found, set the appropriate Hi there I am facing some errors while going to firewalls tab on openwrt luci gui I have upgraded all the packages to the latest version Using OpenWrt SNAPSHOT (r21150-63db906516) OpenWrt Forum Legacy rules detected OpenWrt. For the moment, I'll stick with the default zones and rules and test my custom rules with iptables CLI and default iptables v1. 4. 8. The problem is Hey fellas, I'm trying to set to custom firewall rules in OpenWRT(19. THere is a nice howto in the Wiki and in other places, but nowhere there was example on how to put several IP Address or IP Range as "Source Address". The idea is to restrict access to the Internet to specific devices(by their mac address) at specific times and of the day on the week. 3. INPUT or FORWARD or into the # The vpn rules I used before are as follows, what command does nft use to replace it? iptables -t nat -A postrouting_wan_rule -j ACCEPT -m policy --dir out --pol ipsec -m set --match HI My version is 23. The script is made up of tables, that contain chains, that contain rules. So I though I'll just create an unrestricted port forward and add restrictions using traffic rules. 7' option dest_port '445' I'm trying to rewrite an internal port to an external port for some specific devices through the firewall so I can achieve open NAT type on multiple games consoles. You can either include a shell script with nftables In this case just login eg. In my custom firewall rules I do the following: Match packets against various criteria (dport, sport, source mac etc. user. 19. iptables -A OUTPUT -p icmp --icmp-type port-unreachable -j DROP 3. d/firewall restart" do those rules get reloaded. See firewall configuration to configure firewall rules with UCI and netfilter management to explore the nftables rules created by fw4. 11. 16. 0 Package version: 2. Manual iptables invocations are free-form and will need (mostly-) manual translation into nftables/ fw4 compatible rule sets - this is not simple, both have different Here are some examples: root@OpenWrt:~# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination OpenWrt Forum Rules duplicated in iptables? Installing and Using OpenWrt. local reboot no connection This is the ruleset I used. 7. net tunnel on my OpenWRT. 125 -p tcp --dport 53 -j Create rule in OpenWrt LuCi, apply saved iptables rule from command line. amirulandalib November 6, 2022, 4:32am 8. 6 on Wed Nov 21 16:59:23 2012 *nat :PREROUTING ACCEPT [282:28098] :POSTROUTING ACCEPT [12:748] :OUTPUT ACCEPT [170:12487] :nat_reflection_in - [0:0] :nat_reflection_out - [0:0] :postrouting_rule - [0:0] :prerouting_lan - [0:0] :prerouting_rule - [0:0] :prerouting_wan - Counters are implicitly added for uci rules. I have copied over the VPN config and not changed the client end at all. How can I apply this rule? ## Blocking non-standard MSS values iptables -A INPUT -i eth0 -p tcp -m conntrack --ctstate NEW -m tcpmss ! --mss 536:65535 -j DROP iptables v1. After restarting the router the settings in the Web-Access under Network -> DNS/IP block rules using dnsmasq / iptables are available in data/openwrt folder. I tried "/etc/init. Navigated from luci web interface to system>startup> disabled firewall service ssh into x86, use vi to write new firewall into /etc/rc. . " i didint add or remove anything just added some additional packages like OpenVpn and V2Ray , does anyone know how i can fix this ? 22. iptables -A forwarding_rule -s 192. Unfortunately, TPROXY does not work with bridge filtering enabled because the bridge code path does not Hey fellas I have some custom iptables rules that are based on domain names, so I need to reload those custom rules to update the IPs in case they change. Most of us will fully recommend that you get your rules configured correctly in UCI. It uses sfq with 2 classes only and only 2 rules One with udp protocol and transferred 256kb And one more with tcp and udp transferred 256kb+thats it. What iptables rules do I need to make the traffic go through NAT table? I only want to do this to some LAN clients ideally based on MAC address. net Server: 127. The iptables application uses the netfilter libiptc library to communicate between with the netfilter kernel use vi to write new firewall into /etc/rc. user configuration file, without any success. Network and Wireless Configuration. \\ \\ Installed size: 20kB Dependencies: libc, ip-full, jshn, jsonfilter, resolveip, ipset, iptables, kmod-ipt-ipset, iptables-mod-ipopt Categories: network---vpn OpenWRT: iptables rules: NAT6 and Port Forwarding. Create a directory — /etc/sysconfig. Im using fw3 with banip and noticed I could not pick input/ forward lan and wan rules with ipv4 but can with ipv6 alearting me to the fault. The problem is here. Both fw4 and its outer luci interface are still being worked on quite actively, maybe it comes back, maybe it won't, either way it needs to be handled quite differently to hook up custom nftables commands at the right Hello, my dears, i need your support. 2 r23630-842932a63d / LuCI openwrt-23. nftables is more flexible, in that the I have seen couple products the offers parental control but with a special twist. #The firewall rule for the redirect: iptables -t nat -D PREROUTING -m mac "!" - dlakelan@tintin:~$ iptables-translate -t raw -I PREROUTING -i eth0. I moved this file to the file /etc/config/firewall on the router using SCP (I made a backup of the current one). 20:80 ipta Loading OpenWrt Forum I have a website (apache2) running on raspberry pi on port 443 (https) A ddns domain name is mapped the IPv6 address of my raspberry pi. 2 OpenWrt 22. I have rules in /etc/firewall. 3 -o br-iot -j MASQUERADE Thanks! I'm not a firewall guy but I have a bunch of scripts I've used over the years that are iptables commands. You can see them buried in the output of nft list ruleset or in the LuCI Status / Firewall output. 1:5053 I used to use that rule on my openwrt router just to "hijack" dns requests. In fact, If you want to contribute to the OpenWrt wiki, please post HERE in the forum or ask on IRC for access. 0-rc3 now. Pihole on the LAN. I have realised that I need to increase my understanding of iptables, so I started by looking at what I have at the moment. 1. Disable the default firewall service and enable the new services. Used to be able to do both. 6. Hi! In order to reduce the load on the network/router from the guest network, we use QoS to reduce the dl/upload speed (well, so that guests don't spand so much traffic) I know, this can be resolved here, in wiki: But the problem is that QoS uses outdated iptables, not nftables, and then in “Status -> Firewall” it will say: Legacy rules detected There are legacy In the spirit of the thread: a tip for debugging rules allowing (for example) SSH access from wan: nft add rule inet fw4 mangle_prerouting tcp dport 22 meta nftrace set 1 nft monitor Any packet matching the rule in the first line (tcp dport 22 in the mangle_prerouting chain) will then be traced through the remaining nftables chains, which is handy for debugging rules Hi, I'm having some problems understanding the OpenWrt naming convention for the WAN interface when defining custom firewall iptables rules. I had kmod-nf-nathelper (contains nf_conntrack_ftp and nf_nat_ftp) and kmod-ipt-conntrack-extra (contains xt_helper) installed and added something like this to my /etc/config/firewall: config rule option dest_port '21' option src 'lan' option dest 'lan2' list dest_ip I was able to restore my firewall settings by getting the corresponding settings file directly from the OpenWRT GitHub repository here. 06 solved by custom iptables rules: iptables -t nat -A PREROUTING -p tcp --dport 1111 -j DNAT --to-destination 192. 181' option start_time '00:00:00' option The problem is that at boot time, the custom rules are loaded before dnsmasq is loaded, so the device names can't be resolved to IP addresses and the rules can't be created. I had been mirroring traffic from my router with OpenWrt via iptables to a VM running Suricata in promiscuous mode with these rules: iptables-translate -i eth0 -t mangle -A PREROUTING -s 0/0 -j TEE --gateway 192. d/. Just everything else. 68745-9128656 a few weeks ago I've just noticed a warning on the firewall section about legacy rules detected. Additionally, the directives are organized hierarchically so the entire dump could be run as a script to recreate the firewall rule set. Unfortunately, I have to say that I have not yet had the time to deal with this topic in depth because of other projects that have more priority. Any ideas on how to fix? Thanks, ### Gateway Router-based IPSEC VPN # allow IPSEC iptables -A input_rule -p esp -j ACCEPT # allow ISAKMP iptables -A input_rule -p udp -m udp --dport 500 -j ACCEPT # allow NAT-T iptables -A input_rule -p udp -m udp --dport 4500 -j ACCEPT # disable NAT for communications with remote LAN iptables -t nat -A postrouting_rule -d 172. 2" tcp sport 443 tcp flags rst / rst counter drop. Hello Community, I just heard on the mailing list that a new OpenWrt release is planned for March 2022. trendy April 29, 2021, 9:26am 4. In my 21. You create a "restriction" and add into it the mac address of the device. service firewall disable; service iptables enable; service ip6tables enable Maintainer: @feckert Environment: ARMv7, Linksys WRT32X, OpenWrt 22. In the virtual machine Suricata runs at the address 172. g. 1) when Internet unavailable. 79. One of the best ways to capture the iptable LOG events over a long period is to set up the logging to station on the LAN-side. 02. On my 23. 05. any idea how imay go about fixing this this ? i also get this: Warning: iptables-legacy I have the default OpenWrt firewall set up. I have no idea why it’s still creating iptables rules. Loading iptables before network startup is justified enough, because waiting for dnsmasq would delay firewall startup process and could cause security issues. 1/24 lookup 80 20000: from all to 100. d/iptables to /etc/init. 45,192. But we are not interested in manual setup. 2' option proto 'none' option ipv6 0 option auto '1' config switch_vlan option device I want to configure Openwrt firewall with following rule: iptables -t nat -I POSTROUTING -m policy --pol ipsec --dir out -j ACCEPT How to I write UCI configuration for above? root@OpenWrt:~# iptables -L input_wan_rule Chain input_wan_rule (1 references) target prot opt source destination $ /etc/init. iptables -A input_rule -p esp -j ACCEPT iptables -A input_rule -p udp --dport 500 -j ACCEPT iptables -A input_rule -p udp --dport 4500 -j ACCEPT . I tried iptables-translate and got this: # iptables-translate -A PREROUTING -d 239. iptables -A OUTPUT -p tcp --tcp-flags ALL RST,ACK -j DROP Ping - there's a default firewall rule in If they are using your OpenWrt router for DNS, a combination of ipset, dnsmasq and iptables should do the trick. 213 -d 0. The script could be loaded using init scripts or added to /etc/rc. In the firewall tab I receive a notification: Legacy rules detected There are legacy iptables rules present on the system. \\ This version supports OpenWrt with fw3/ipset/iptables. I would be grateful for any Hello community, I am currently running 21. 16:80 iptables -t nat -A POSTROUTING -j MASQUERADE. We set the iptables rules as below: iptables -C input_lan_rule -p tcp -m tcp --dport 9999 -j ACCEPT || iptables -I You're applying simplified host based iptables rules (and concepts) here. Then the device is limited to the "restriction". 2 alias I can use for defining my own iptables rules. d/firewall reload" and that won't reload the custom rules "firewall. I've seen that iptables in recent openwrt have been replaced by nftables, hence I would like to know, how to convert thoses rules (geoip) to be compatible with nftable. I've looked on previous topis like [1] [2] and [3], but, as new user (I've got zero experience on iptables, until now I've just used I’m wanting to input some custom firewall rules on the firewall tab and I’ve noticed it’s disappeared, where can I collect this again? Thanks How do I add iptables rules as before. I was slightly confused by this at first, but it makes sense once the mapping from the luci gui to the iptables rules is considered, but I think it's potentially opens the firewall more than intended. Is it even possible ? There is a ssh integration for home assistant so maybe it would be better to incorporate this in that integration. Either a select of "append"(default)/"prepend" or even a numeric input providing the position (not good for Hello i play first person shooter games in console ps4. 250 -j TTL --ttl-inc 1 What should the entry in the "/etc/config/firewall" file look like? Thank you in advance for your support. I have already set up a dedicated port on the router and connected a Wireshark machine directly to it: config interface 'monitor' option ifname 'eth0. 006. With old versions of OpenWRT, I intsall ip6tables kmod-ipt-nat6 kmod-ip6tables kmod-ip6tables-extra packages Since OpenWrt 22. When a LAN client connects to the WAN IP of the router, the LAN client IP and port aren't translated. 3' list dest_ip '192. By running iptables-save > myrules, you will have a file that contains all that is necessary to restore your Is this the correct way to add iptables rules using "Network --- Firewall - Custom Rules" These are the steps I took. However, this isn't ideal as this creates three layers of NAT before traffic leaves the phone (pfSense router, OpenWRT router, Android tether). Only by running "/etc/init. user". iptables -A FORWARD -s 192. Requires package "iptables-mod-nat-extra" for port 53 (DNS) redirect rule from dnsmasq. OpenWrt 22. Can I put 192. Hello Guys, i need your help :grinning: I need a NAT Rule on my openwrt device, its only a port forwarding. Ask Question Asked 8 years, 11 months ago. Hello,everyone Ask about nftables Now the following iptables rules How to write the corresponding nftables rules 😀 iptables -t nat -A postrouting_wan_rule -j ACCEPT -m policy --dir out --pol ipsec --reqid 10 -m set --match-set ipset_table dst Heyho I recently upgraded to the latest openwrt version and nftables. Then I went into Network -> Firewall -> Traffic Rules and created a rule: Forwarded IPv6 How to enforce clients to use the configured DNS and not be able to change it? I read somewhere that it can be achieved by using iptables which I'm not familiar with. No matter what rule you insert after that, it'll never be reached. local. 168 I ended up with this #!/bin/sh logger -t firewall-custom "Starting custom firewall rules" # Flush existing mangle table rules nft flush table inet mangle # Create mangle table and chains if they don't exist nft add table inet mangle # Add chains for postrouting and prerouting with TTL modification nft add chain inet mangle mangle_ttl_out { type filter hook postrouting priority Hi I am willing to create a new firewall rules to block my kids accessing internet during night. To do this I need to mangle the time-to-live for multicast packets. That's okay, it's only LTE uplinks and almost zero inter LAN traffic. cybercit iptables-save. eth0 is LAN eth1 is WAN. 0 International However, I am wondering about the custom firewall rules that the author is adding to OpenWRT: iptables -t nat -A PREROUTING -i br-lan -p udp --dport 53 -j DNAT --to 192. I want to restrict incoming calls to the website only via above nginx (the main domain name is pointed to the VPS) and not I'm using an Asus RT-AC85P running OpenWrt 21. So I went through the generated iptables, and it made sense, but I noticed that INPUT and OUTPUT both had a default policy of ACCEPT, which surprised me especially for INPUT. gmx. 250/32 -i br-lan -j TTL --ttl-inc 2 nft # -A PREROUTING -d The port forwards themselves can only match a single IP(-range). I had the iptable commands below which would intercept http requests to an internal ip (192. Hello, I need advice on how to add an nftables rule to duplicate all traffic to a network hub with IDS Suricata. 07. Generally I would like to disable IPv6 routing to prevent "IPv6 leaks". Generated by iptables-save v1. We set the iptables rule to redirect any website to gateway ip(192. There is no I recently updated a router from 19. 03 to see the differences I noticed that the custom rules tab in the firewall section is gone. Based on these rules, the kernel determines which routing table to use. 7 Some months ago I remember I've setup a firewall rule to block Supercell games. These rules are focused on latest OpenWrt release (Chaos Calmer 15. # clear iptable rules iptables -F iptables -t nat -F iptables -t mangle -F iptabl So I decided to use iptables to solve this with the following rules placed in /etc/firewall. I imported my network and firewall configurations manually from a backup I made before deleting everything, and even modified the dockerd init file to include both fixes outlined in this post (which had By setting target/port as DROP, I still can reach service/port with netcat: #Deny snmpd on WAN config rule option name Deny-snmpd-WAN option target DROP option src wan option dest_port 161 option proto udp option family ipv4 $ nc -vuz My-Public-IP 161 Connection to My-Publi My fail2ban bans but rules of iptables do not block traffic ! root@LPM:~# fail2ban-client status Status |- Number of jail: 4 `- Jail list: ddos, dropbear, nextcloud, portscan root@LPM:~# fail2ban-client status nextcloud Would you by any chance know how to adapt it for changing the TTL on a bridge instead of a routed setup? For a routed setup iptables -t mangle -I POSTROUTING -m physdev --physdev-out usb0 -j TTL --ttl-set 65 should work, but I'm not keen on downgrading openwrt just to use iptables and haven't touched nftables before so I've little clue on how to translate it. 0 root@OpenWrt:~# iptables-save -c. iptables -A INPUT -p icmp --icmp-type echo-request -j DROP 2. But OpenWRT and its fw3 (using UCI) uses zone based rules that explicitly controls traffic flowing zone to zone. 06. using telnet/ssh to your openwrt and add the iptables rules (adjusting) your addresses, eg: iptables -I PREROUTING -t nat -p tcp -d 192. Modified 6 years, 11 months ago. You are still thinking in terms of iptables (not helped by the very confusing use of the term "ipset" in fw4 as this implies iptables in all other Linux distros). 46-192. 2 -p tcp --sport 443 --tcp-flags RST RST -j DROP nft insert rule ip raw PREROUTING iifname "eth0. It then sets up iptables rules and uses iptables MARK to mark certain traffic. I put this in the custom rules sections Iptables rules are tested sequentially. I have a rule for forwarding public web traffic to one of the hosts on my private network, but I usually leave it disabled. The question is trivial: can IP be used in mangle table with -d, or -s options? OpenWrt Forum Mangle iptables questions. My iptables rule is: iptables -I FORWARD -s 192. When I 22. From a tun to lan: iptables -A PREROUTING -p tcp -m tcp -i tun0 --dport 8080 -j DNAT --to-destination 192. If I enable the firewall i cannot access the device from the network. 250 --dport 6607 -j DNAT --to-destination iptables is the user interface to the kernel netfilter subsystem. The ultimate goal is to set up a cheapest home Internet with a T-Mobile tablet plan. 1). 06-SNAPSHOT. I think that the In CLI shell enter "iptables -L" Note the LOG rule is now missing from the zone_wan_forward chain; At this point you can either do "service firewall restart" in CLI or click "Restart Firewall" on the Custom Rules page, and check "iptables -L" again to see that the LOG rule is back. 125 -p udp --dport 53 -j REDIRECT iptables -t nat -A PREROUTING -i br-lan ! -s 192. 1 Address: 127. These are supplemented by things I can add to the custom rules section (I have a few for openvpn). Take delegate_input for example(other chain has similar structure): two ACCEPTs:accept lo and tcp RELATED,ESTABLISHED traffic; OpenWRT (along with other distros), have a iptables-save command. 03, fw4 is used by default, and it generates nftables rules. Additionally, the directives are organized hierarchically so the entire dump could be run I have a TP Link router with ExtRoot enabled and the router connects to the main gateway through WiFi using relay configuration and the router does not use the firewall because it is disabled. I need to change it to iptables -t nat -A POSTROUTING -o eth0 -s x. With the switch to nftables (fw4), is there a migration guide in the works for custom rules? My initial questions: LuCI has two Firewall status sections in 22. Symlink /etc/init. I'm almost certain I have my system properly configured, but maybe I'm missing something? I would like to, at the least, allow people on the internet to use a bounce VPS wireguard server provisioned I just installed OpenWrt 22. x/16 -j SNAT --to-source x. In the OpenWrt LuCi web interface, one can create rules but leave them disabled. 4, but I seem to have run into some issues with Docker since the reflash. I am noticing that docker bridge bypasses openwrt firewall rules What are other people doing when they host docker containers on an x86 openwrt21. The goal is for the router to see the translated port number, I think it needs iptables, If firewall3 is unavailable, one can add netfilter rules manually using the iptables command in a shell scripts. 150 In OpenWRT/TOS I have device eth3 → interface ids My router in a virtual machine x86 is still on 21. Therefore, I'd use -d pop. zone config) etc, and also starts the containers, meaning the respective veth devices are also added to docker0 bridge - but the relevant nft rules are still missing. But I have 1-2 machines which I'd like to allow explicitely. I don't see any records of any packets whereas I see The iptable rules above will generate a log message for each match with the given log prefix but where do the log messages go? See log. In this release, the firewall is now used on nftables by default. 3, those aren't working anymore and it seems to be because the package is now called iptables-nft. In 22. 03 uses the nftables based firewall4 instead of the old iptables firewall. 1 anywhere /* Allow-SSDP */ So that works, but How do i convert iptables rules to nftables rules? 1. Viewed 6k times 1 . 0-rc1, Firewall (iptables) and Firewall (nftables). Current setup: ISP router on bridge mode connected to an openwrt router both are in same subnet. 2. 133:8082 iptables -t nat -I POSTROUTING -p tcp --dport 80 -j MASQUERADE I've been at it for hours and have had to boot OpenWRT into failsafe mode a few times. 3 on Mon Sep 18 15:25:58 2023 *nat:PREROUTING ACCEPT [3916:527536]:INPUT ACCEPT [1749:121055]:OUTPUT ACCEPT [1342:94996]:POSTROUTING ACCEPT [3:129] Second, you have the DSCP rules from wan to lan but you are using source IP from the lan, is that correct? I am facing the same issue. Are you having an actual issue with a mangle iptables rule? If so, please provide that information in your next post - for someone to provide you assistance. Screenshot_20221106-103129 I read another thread Routing Port Forwarding about something close to what i'm doing, but it doesn't quite work for me and I tried quite hard to read the documentation. There is a good summary of ranges here https://www. 101. To clarify, I have a stanza in /etc/config/firewall that creates an ipset for IPv4 and another for IPv6 addresses: and I have iptables rules: So if I look at iptables directly I see what's generated. I only found out about it a month ago. Backup & Restore needs to be more specific on what needs to be restored. Hey there! Just reflashed from factory my copy of OpenWRT, now happily in version 22. By the way, at that time, the openWRT firewall added the following custom rule. 189 lookup 80 20000: from all to 192. , access to NAS service for specific hosts. 5 on X86 hardware and some of my firewall rules use GEOIP extra arguments like : -m geoip --src-cc <country_code> . However, there is a limitation in IPtables with bridge filtering, and it does not support marking packets for TPROXY when br-netfilter is enabled. help convert iptables rule to nft iptables -t nat -I PREROUTING -i br-lan -p tcp -m set --match-set onion dst -j REDIRECT --to-ports 9040 /etc/config/firewall config ipset option name 'onion' option ma Can you provide the actual model information - so we can cross reference it with supported devices on the Table of Hardware?. First one drops all traffic to 192. 02 host when it comes to securing the firew Background: I am in a strange network that a router could only get single IPv6 address from the DHCPv6 server, that is to say, the IPv6 address of my route is a /128 address, which means I have to use NAT6 to enable IPv6 network for my devices in LAN. example, assuming your proxy is listening on 8080 How can I do the following rule in nftables? iptables -t nat -A PREROUTING -s 192. Installing and Using OpenWrt. x:5353 iptables -t nat -A PREROUTING -i br-lan -p tcp --dport 53 -j DNAT --to 10. Mixing iptables and nftables rules is discouraged and may lead to incomplete traffic filtering. root@OpenWrt:~# iptables-save # Generated by iptables-save v1. I dont remember exactly where/how, btw some time later I've removed it. I can't for the life of me sort out a way to do this with nft. When br-netfilter is enabled (set to 1), it enables bridge filtering, allowing IPtables rules to be applied to bridge traffic. 1:53 Non The input_rule queue is a a good place to activate those rules manually with the following commands. d/ip6tables to iptables. essentials for an understanding of how openwrt logging works. To provide more functionality, include mechanisms are available. 254) on port Actually, the openwrt iptables rules are well organized. Counters are optional in nftables and so there isn’t the same ability to see hit counts on every rule and chain like in iptables. I am new here and I hope find answer to my question i hvae set rule in openwrt iptables. eg config rule option src 'lan' option dest 'wan' option target 'REJECT' option name 'some weekday' list proto 'all' list src_ip '192. 02 which is no longer stable, so I think I should update to the newest stable, but I have custom firewall rules setup They currently look like the following: iptables -t nat -A PREROUTING -i br-lan ! -s 192. iptables -t mangle -A PREROUTING -i br-wlan -d 239. I have the following iptable rules: iptables -t nat -I prerouting_rule -m mac --mac-source $2 -p tcp --dport 80 -j DNAT --to-destination $3:80; iptables -t nat -I prerouting_rule -m mac --mac-source $2 -p tcp --dport 443 -j DNAT --to-destination $3:80; Hi guys I'm running openwrt 21. 1-7 Description: This service enables policy-based routing for WAN interfaces and various VPN tunnels. OpenWrt Forum Export Firewall Rules, for a new Install. 3 (legacy): Couldn't load match `tcp My question is specific for iptables, not OpenWRT. Since latest RC1 has switched to nftables (fw4) instead of iptables (fw3), I have encountered the problem of getting guest network to private network ips dropped while with some exceptions, e. All the default OpenWrt firewall rules aren't necessary, and seem to be a holdover from before Chaos Calmer; The only rule that could potentially be necessary is the ESP Hello, i'm facing a strange issue on v19. When I try to narrow it down, Ok, I think I've come up with a solution. I had some iptables rules in /etc/firewall. If the WAN is directly connected to the ISP (no PPPoE), usually there is the eth0. Manually reloading the configuration with uci fw3 print dumps all the netfilter rules to stdout as a set of iptables directives. That is iptables. user as such doesn't exist anymore (see /etc/nftables. 2 openwrt router using fw4 I have a single traffic rule that targets anything going to If I tweak OpenWRT to use a standard routed NAT setup, the mangling works with the following iptables rule: iptables -t mangle -I POSTROUTING -o usb0 -j TTL --ttl-set 65. Each directive is a complete iptables command, runnable in a shell. 245. I have iptables-nft and ip6tables-nft installed. In iptables tables also exist, but in only certain types. net with iptables and this would create two additional rules since at this time the name resolution returns two A records: nslookup pop. I realize that as soon as the tunnel device went up, my entire LAN had IPv6 access. The file that I needed was firewall. " When a typical SOHO (me) wants to add a DMZ for a small web server, there is nothing to hang his/her hat What I mean is, the DNS Rewrite rule screenshot above is still using iptables before. beneix October 29, 2021, 12:19pm 1. I created some firewall traffic rules using LuCI to block HTTP(S) access to my gateway and it worked as expected. I'm aware that I'll have a (kind of) slow link, as all the traffic needs to pass the CPU for filtering. And how to make this rule persistent even after reboot? In Proxmox I have a linux network bridge with bridge_ageing 0. 05 branch git-24. 156 iptables-translate -t mangle -A POSTROUTING -s 192. d/ as a rough equivalent). Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4. it only seems to add a rule for the first day listed. BCP38 and IPTables: Legacy Rules Detected. 173. 0/24 ct state new logging prefix "NHRP Multicast: " Because nftables (fw4) is different than iptables (fw3) and /etc/firewall. I specifically chose this method because it adds controls to the OpenWrt GUI for easy enabling and disabling of firewall rules. I also don't see a Hello After upgrading from OpenWRT 19 to OpenWrt 23. 2 in Openwrt 18. I upgraded my WRT1900ACS from 21. 7) on an Archer C7 v2. Then, if the WAN uses PPP encapsulation (PPPoE) I need to use the pppoe-wan interface in " Legacy rules detected There are legacy iptables rules present on the system. The I'm trying to get smcroute working on recent OpenWrt (so I can use DLNA over wireguard). 03 and when I created another vm x86 with 22. 40,192. config. ffnus utj wtlakywl kidga rwcfuw utdiyin nfpubb lbagq wiwo kiqli