Nat loopback openwrt I wonder if the problem lay somewhere else, not Oct 4, 2020 · NAT Loopback on OpenWrt as bridge Installing and Using OpenWrt Network and Wireless Configuration diam0nds October 4, 2020, 8:56am Nov 30, 2024 · Network Hướng dẫn cấu hình Hairpin NAT (NAT Loopback) trên router OpenWRT 30 Tháng mười một, 2024 1 Comment Trước đây mình đã từng chia sẻ cách cấu hình Hairpin NAT trên router Mikrotik (RouterOS) để có thể truy cập vào server trong cùng mạng LAN nội bộ thông qua IP Public hoặc tên miền. 2 Assuming your ISP's router supports NAT loopback, it is possible to set up but can be very fiddly depending on a lot of factors. Jun 20, 2023 · openwrt下关于NAT端口回流问题的探讨与解决方案，作者：李毓NAT端口回流其实是一个老生常谈的问题，但是我发现其实这个问题有很多人并没有理解为什么会发生以及并没有给出一个合理的解决方法。 今天我们就一起探讨一下这个问题的产生以及如何去解决它。 Apr 24, 2022 · 1. Jun 13, 2021 · FS#3875 - NAT reflection/loopback fails with multiple zones #8868 Closed openwrt-bot opened this issue on Jun 13, 2021 · 7 comments Jan 21, 2022 · Hi I don't know if NAT Loopback is enabled or not in OpenWRT. I try in port forward Incoming IPv4 from WAN to this device port 1-65535 forward to 192. DD-WRT). \nThese instructions came from this page. The reason this Jun 4, 2019 · I have a home network with a modem and a router (SmartRG SR905AC) provided by my ISP (EBOX). 100 -p tcp –dport 80 -j DNAT –to 192. Jul 9, 2018 · The setup of NAT loopback rules is currently tied to the zone of the target host. 255. goal clients all allocated with private ipv6 address with a specified ULA prefix, not public ipv6 address clients' can visit public ipv6 internet, but cannot be visited from public ipv6 internet 2. NAT Loopback is enabled and works, but not on 443 and 80 ports. There is port forwarding on the rou May 10, 2020 · Hello. Thanks for your help! Feb 12, 2019 · ThomasCr: Hi, today I updated my LEDE installation to OpenWRT 18. Nov 18, 2020 · @electrogamez, welcome to the community! "NAT Loopback" as noted in OpenWrt works on the specific IP in question. root@OpenWrt:~# ip a 1: lo: <LOOPBACK,UP,LOWER May 2, 2020 · Cool So far everything is working OK, and my NAS is accessible from the Internet. The weird part is that NAT Loopback works if I'm internally connected to the IoT LAN. x, Version 15. Problem is that they get to the forwaded box with the LAN source IPs. May 12, 2025 · NAT reflection (also called hairpin NAT or NAT loopback) allows clients on the internal network to access services on the same network using the external (public) address. Hey, I have a NAS, so I just use my NAS to set NAT reflection should make this possible. 05 see Iptables single host nat but it's not working for split tunnel setup (openfortivpn) - only for full tunneling. 2). I opened tickets #1095517, #1090749, #1090749 with MSI support because the NAT loopback/reflection was working over WiFi but not over a wired connection. I simply want to explain them a bit more, and confirm that these instructions for loopback forwarding work on OpenWRT Kamikaze. In your case, both hosts are in the same subnet, which results in the response bypassing the router. 0' config globals 'globals' option ula_prefix 'fdfc:2a3e:134a::/48' config interface 'lan' option ifname 'eth0. Is there a way to tell my default -Gateway (Openwrt Router 192. That way a domain like example. Mar 1, 2024 · NAT Loopback! In modern router systems, NAT loopback has long been taken into consideration. Without the NAT loopback, the connection would appear to The kind of nat loopback this ticket is about refers to the creation of automatic DNAT+SNAT rule pairs to make external ports forwards (WAN->LAN) available from inside the LAN. This excludes the IP address ranges of the subnets served by my second router, which causes NAT OpenWrt / Access LAN from LAN as if you accessed from WAN [Tomato] tomato firmware - NAT loopback settings - Linksys | DSLReports Forums DD-WRT Forum :: View topic - Access LAN side services using WAN IP and port forwarding Post #4 mulder77 23 Jan 2011, 22:42 Hướng dẫn cấu hình Hairpin NAT (NAT Loopback) trên router OpenWRT 30 Tháng mười một, 2024 May 26, 2020 · When enabling NAT loopback for a port forward, it seems to be enabled for both the LAN and guest network. My goal is to be able to take this router to NAT Loopback (hairpin) not working - OpenWRT Helpful? Please support me on Patreon: / roelvandepaar With thanks & praise to God, and with thanks to the many people who have made this project Nov 19, 2018 · despite NAT loopback being enabled on the port forward rule. As other options, you'd have to: make a firewall redirect rule that covers the zone/interface/subnet; or DNS entry giving and A Record to the LAN IP For firewall config, I make a rule that allows the traffic and places the packet in the SRC network . I believe this term has other definitions on different router distros (i. Aug 10, 2024 · The router will automatically rewrite the source IP in the response – but only as long as the response goes through the router. I've added Firewall rules to allow WAN on 30080 to forward to my zone with IP 192. My tickets didn't mention NAT loopback or NAT reflection because I didn't know these terms at the time for the issue I was experiencing. I might look into introducing a new option "reflection zones" or similar to change set but I can't promise that it'll happen anytime soon. What type of setting do I need to adjust to allow NAT Loopback between different subnets? Dec 29, 2023 · Enable NAT loopback is already enabled and 'Loopback source IP' is already set to Use Internal IP address. I also have a sql server that is accessible from the internet with my public Aug 31, 2022 · I would like to configure 1:1 NAT for my ISP modem connected to my OpenWRT WAN interface. May 10, 2023 · In NAT loopback not working I asked about NAT loopback issues. The firmware version of Smart/OS is 10. When configured it worked great but after some days the NAT Loopback stopped working, so I was not able to access from LAN but from external was still ok, even disabling and re-enabling the function or restarting the Feb 26, 2017 · Any idea how to get NAT loopback / hairpin / reflection working with upnp created port redirects? Any universal FW rule I could add? Jan 27, 2020 · NAT Loopback 大流量情况下，对路由器要求高，造成传输效率低，搞不好就死机了。 不知你使用的工具对处于局域网和互联网的同一机器优先级判定是如何的，可以同时指定互联网 DDNS 的域名，然后在指定一个内网解析的域名，这样处于互联网时通过端口转发访问，处于内网是优先使用内网地址直链 Port Forwarding Port 80 & 443 EDIT: It seems to be NAT reflection which I can't get to work. On a normal OpenWRT/LEDE setup, these port forwards should automatically include reflection. Nov 11, 2016 · NAT loopback allows to use the external IP inside your local network and still be able to reach the server you want. 0. Current config is fairly simple. Nov 16, 2024 · I looked at the port forwarding rule Factorio-wan (easy to test) and noticed that under Advanced SettingsEnable NAT Loopback was already checked. Switched this Option to internal makes no difference. Apr 20, 2023 · NAT loopback not working Installing and Using OpenWrt Network and Wireless Configuration asdil12 April 20, 2023, 10:59pm Jan 12, 2024 · I have configured my firewall to enable NAT loopback, I have tried a number of other posts' advice. x address are local LAN addresses that it should include in the NAT loopback? Apr 20, 2023 · 记录一下nat环回问题和解决办法 火 [复制链接] 1 2 3 4 5 / 5 页 下一页 返回列表 发新帖 高级模式 Usually the firewall automatically adds NAT loopback rules for "config redirect" rules with target DNAT. 4. 1 to 10. 1 NAT Loopback是啥 NAT Loopback，直译 NAT环回，它可以解决内网用户无法通过公网映射访问同内网服务器的问题 对于一个NAT映射 如果打开了NAT环回，那么内网用户将可以通过此映射访问内网服务器；反之，则无法访问 For example： Aug 24, 2023 · I'm trying to connect to my server 10. This UCI subsystem is responsible for defining switch VLANs, interface configurations and network routes. 18. 17, not the other way around, so that rule Dec 13, 2019 · Installing and Using OpenWrt hellbringer616 December 13, 2019, 1:15pm 1 Hello, I am a new OpenWRT user (long time TomatoUSB user) that runs a gaming server on my network and i am having a heck of a time with NAT Loopback (i think anyway) Here is my issue: When attempting to connect to my server locally i must use it's local IP otherwise i am unable to get the server to respond. Since the iptables-save output shows rules for reflection, I assume LEDE is at least trying to do that. Dec 25, 2022 · "NAT loopback" as I've experienced it in OpenWrt - only works on the single IP/net in question. NOTE: please focus on service-443 because that is the one I am trying to get working Jul 13, 2023 · I've got a router from my ISP which has my public WAN address, let's call it "router 1". INPUT and OUTPUT for the often forgotten loopback interface. 30 port 30080 and cannot seem to get outbound access working at all. \niptables -t nat -A prerouting_rule -d 100. Weird thing is that ICMP (ping) packets do come from the wireguard peer ip on my Oct 30, 2021 · For firewall config, I make a rule that allows the traffic and places the packet in the SRC network . But if it is does that mean if I lose internet I can still use the services offline without having to set a local DNS record? Dec 8, 2024 · NAT（网络地址转换）是一个至关重要的功能，它允许多个设备共享同一个公共 IP 地址，从而有效地管理和节省 IP 资源。在 OpenWRT 路由器上，正确配置 NAT 可以提高网络性能和安全性。 Nov 12, 2022 · In the Openwrt router i have enabled NAT Loopback with Option to use External IP. Is there anything doable to get them to arrive with the external source IP? Thanks a lot! This should work out of the box when you set up the port forwarding if you have the "Enable NAT loopback" ticket in the advanced tab and if your destination zone is set to the zone from where you need this to work. 100, so I forward https traffic at port 443 from openwrt router to my web server, and ev&hellip; Sep 25, 2021 · How to do NAT loopback with a dynamic WAN address Installing and Using OpenWrt Network and Wireless Configuration BigG September 25, 2021, 11:28pm Jan 18, 2018 · I have multiple LAN zones. The signal strength is excellent as for testing Dec 27, 2023 · I'm looking to do networking 101 here, but can't seem to setup the port forwarding rules to get this working. Running OpenWrt 18. To pick up a draggable item, press the space bar. com is not reachable from LAN (yet ). The option syn_flood 1 or option mtu_fix 1 each translate to complex nftables rules. Few days ago, I installed an app on OpenWrt, and this app need a subscribe link to keep updated. So let's pretend there's a network 192. First, NAT loopback on OpenWrt only relates to the host in the rule (i. the Apache server). My openwrt router sits at 192. 5. If I understand correctly, you want to connect from 10. This is how my setup looks. 0/24) with IP Edgerouters and openwrt seem to handle hairpinning without issue. How can i do it? I tried to configure SNAT with destination IP=my public ip, rewrite ip=my wan ip. And what rules i must put in firewall--->custom rules? pppoe connection has dynamic ip from my ISP. Mar 16, 2022 · 外网IPv4访问内网IPv4设备，需要在LuCI页面 防火墙->端口转发 设置端口转发。 内网设备通过wan口IP访问被端口转发的内网设备，因为访问数据是从区域lan进入的，不会匹配到从区域wan输入的端口转发规则，因此相当于访问wan口本身，所以访问不到被端口转发的内网设备。 LuCI页面添加端口转发是默认勾选启用NAT环回的，则防火墙除了添加端口转发还会添加一对SNAT（源地址转换）和DNAT（目的地址转换）规则来处理NAT环回的问题。 Mar 23, 2021 · Hi, I have a NAS connected to lan of OpenWrt, and in order to access my NAS by using domain name (or public IP) anywhere, I set a Port Forwarding rule for it. 20. 2/ My first OpenWRT router receives IPv4 address via WAN interface and has IPv4 LAN. I actually almost got into into an all caps email war with my company's managed router provider because they kept insisting hairpinning didn't exist. Nov 24, 2024 · hi everyone, So I've just attempted to setup openwrt 24. I need it in order to be able to treat the local area via the external ip to the server that is located in the local network. I needed to map particular servers to particular static IP addresses on the wan3 Oct 23, 2024 · NAT loopback is enabled by default and the destination zone (lan) in the redirect (DNAT) rule is used as the source zone for the reflection rules. In my case, I have two WAN interfaces with dynamic IPs used to load-balance outgoing traffic for all normal clients, and a third WAN interface with a static IP block used for outgoing traffic from servers. 17:16666 with my computer 10. Jan 11, 2010 · If you use OpenWRT and have a server on your LAN, you probably want to setup loopback forwarding. TC7650 cable modem plugged directly into the AC86U (no double NAT). In short, the problem was DPI bypass software that I recently installed. Personally I use a second-hand Netgear WAX206. Dec 26, 2020 · 在防火墙做端口转发，就算勾选启用 NAT 环回。最终也是无效果的。最终的影响就是无法在内网访问被映射出去的公网地址 Jun 14, 2009 · If you happen to use port-forwarding with your OpenWRT-powered Linksys WRT54GL, then you must know that there had been a problem that made DNAT unstable after some period of time – the port forwarding stopped working completely or it started redirecting to different ports (weird, isn’t it?), as described in #2558. Nov 19, 2019 · 问题得到了解决，原因不是 NAT loopback 不起作用，而是bridge防火墙给阻挡了回流的流量，之前一直怀疑是这样，因为发现nmap一直显示 filtered 而不是 closed Jul 17, 2024 · on Jul 17, 2024 · edited by morytyann Edits Collaborator 关于启用后NAT类型变成PortRestrictedCone，只要流量经过了插件就会这样，可以参考OpenClash的 Issue 关于公网IP入站没有跳过的问题，我这边测试过是正常的，无论是重启系统还是重启接口，你也是PPPoE拨号吗？ Jan 8, 2024 · Routing/NAT Offloading with PPPOE-WAN incorrect setup with nft which lead to decrease speed to 200Mb/s (even you have 1G/s) any setting as Packet Steering/irqbalace does not help. Aug 15, 2023 · Describe the bug OpenWRT does not NAT under sone circumstance, if ip-full is installed . 10 (tested on 23. 45 client is Mar 30, 2023 · I have a home assistant instance running on a raspberry pi at 10. 200. 1 and I want to map it on my OpenWRT LAN bridge (192. Feb 20, 2025 · For the NAT loopback, I think these are the settings I need to provide in the LuCI UI under Network -> Firewall -> Port Forwards. 05. The modem IP address is 10. Jul 4, 2025 · NAT loopback rules should present. (moved from pppoe to dchp docsis3) I have several services on my lan that i access with ddns from outside and inside the lan. I would like to have my DMZ-connected visitors to be able to access services by their global DNS IP (wan) that are redirected to another zone, let's say lan. This currently is bugged in Lede. network toplogic a main router support ipv6, and ISP assigned a public ipv6 address, ipv6 and ipv4 both works well a secondary router run openwrt behind main router, ipv6 and ipv4 both works well Oct 3, 2023 · My setup is as following: 1/ An ISP router to which I have no admin access, and which gives IPv4 address via DHCP and MAC filtering to my first OpenWRT router. 3 ip address. It worked with OpenWrt and Kernel 3. com can be used internally and externally at the same time. But it does not seem to work. I have a public service, that use the "port forward" to public, and I need access the service use the domain and public port, so I need the NAT Loopback function. These two networks are seperate. How do you easily enable NAT loopback for multiple vlans to 1 server IP address with public urls and reverse proxy. 100. I have installed "luci-app-wol". I've usually had OpenVPN Server setup in TAP mode, but have recently switched this to a TUN configuration as I have replaced my Android Phone the OpenVPN Client I used which supported TAP is no longer maintained and does not function on newer Android versions and I am wanting to avoid buying another This is a Canonical Question about Hairpin NAT (Loopback NAT). The option masq 1 translates to the '-j MASQUERADE' target for NAT. My internal network starts at router 2, everything in the network is connected to it and all ports from router 1 are redirected to router 2. 1, I have a web server at 192. Weird thing is that ICMP (ping) packets do come from the wireguard peer ip on my Hi! I wanted to configure NAT reflection so when i try to reach my public ip address (not nated private ip on my wan) traffic will stay on my router instead of going to ISP router and coming back. For what you desire, you'll have to configure complex redirects to accomplish the task using NAT. We would like to show you a description here but the site won’t allow us. WAN for internet, LAN for my personal network, and MANAGEMENT for my hosted servers. Needing assistance on create a NAT Rules so that when I visit sites like ipchicken it will show the ip address of an loopback interface that I have created. Apr 25, 2024 · Hi Everyone, I have been trying to solve this for the past couple days but just haven't been successful. I have a Synology NAS which runs… I use the auto generated rules that come from OpenWRT as an example of NAT reflection (NAT loopback). They read as such: I also tried adding a NAT rule to change the source IP. 1. ddnss. After disabling and re-enabling NAT loopback in port forward it does work, but after full reboot again unable to connect to public address from inside LAN. Aug 30, 2019 · If you officially own their modem, you can try and mod it with custom software like OpenWRT/Padavan for routers. You changed in ucode files or added ruleset include? No, and simply analyze this generate nftable rule, you think it is correct? I am trying to work out the correct way to support NAT reflection on my home router when I have several additional local subnets accessible via a static route (through a second openwrt router). INTRODUCTION What is NAT Loopback and why is it needed to host a public Opensimulator Region? Currently (as at August 2010), a hosted region on a home connection with a broadband router needs, what is known as NAT Loopback functionality. OpenWRT wan - 12. Currently, the fw3-generated firewall NAT rules set the source address scope to match the "lan" zone. Mar 10, 2025 · しかし、通常の設定ではWANからのみDMZへフォワードされており、LANからのアクセスはOpenWrtの管理画面が表示されてしまう。 Mar 21, 2024 · I don't think this is working. , I can connect from lan to the external IP address/port and get a response from the internal host). 1' option netmask '255. hu provider. After switching to a nanopi R6s, I can no longer get this working. Press space again to drop the item in its new position, or press escape to cancel. 10 snapshot to an older configuration that worked on 23. Everything works, however when connecting to 1. Otherwise, I think, there's only NAT bridge on laptop that can help you somehow BTW, can you access your own servers using public IP? I added a wiki config section on controlling the external interface and IP used when sending out traffic. Feb 6, 2022 · ISP gateway doesn’t have NAT loopback functionality neither allow DNS server customization WiFi router does have NAT loopback functionality and DNS server customization is possible WiFi router is set as a DMZ host of the DMZ network created by ISP gateway ISP gateway and WiFi router IP address are fixed WiFi router DHCP server functionality The ubiquitous BGW320 doesn't even have NAT loopback! By choosing an OpenWRT-supported device you'll have the chance of fixing any software issue without spending a penny, even if you plan to stay with the original firmware, it's like an extra warranty. Please advise. Yes OpenWRT has a check box called Enable NAT Loopback for each port forward. The whole idea is that if you initiate a request from lan to the wan address (es) of the router, you should be redirected to the host (server) located on the lan. I have a port-forward to an internal host (with "NAT Loopback" checked) which works properly from the WAN, and at first worked properly from the LAN (e. 168. It has taken me ages to get it working and just wanted to share what I finally found out to get it working. But now, the NAT loopback stopped working, in that packets aren't reaching the internal server. mangle rules that match bits in the packets TCP header and then modify the packet. 64. Sep 22, 2025 · Managing configuration The central network configuration is handled by the UCI network subsystem, and stored in the file /etc/config/network. The easier answer is to just add an entry to OpenWRT's DNS that points to your server internal IP. 3 port 8080 I have a port forward for anything coming in the WAN on port 80 -> 192. 1 r7258-5eb055306f on linksys 1900acs for few years now. Oct 4, 2025 · 文章浏览阅读1. Feb 17, 2024 · Once I did that, the NAT loopback started working without the tcpdump actively running. 30:30080 and I can access it within my network. Oct 18, 2020 · I know they aren't the same, but given NAT loopback doesn't seem possible I was also trying to see if I could accomplish similar via local DNS. When configured it worked great but after some days the NAT Loopback stopped working, so I was not able to access from LAN but from external was still ok, even disabling and re-enabling the function or restarting the Feb 26, 2017 · Any idea how to get NAT loopback / hairpin / reflection working with upnp created port redirects? Any universal FW rule I could add? Jul 4, 2021 · Cách khắc phục là phải thiết lập cái hairpin NAT/NAT Loopback/NAT Reflection (mỗi HĐH router gọi một kiểu, OpenWrt nó là cái NAT Loopback). I can access the camera directly with its local IP even from the main LAN. OpenWrt version r23300-86bc525d00 OpenWrt target/subtarget ipq807x/generic Device Xiaomi AX3600 Image kind Off Aug 4, 2015 · Internal port: "9" Enable NAT Loopback: enabled Extra arguments: "" But I still can't wake up (from internet, not local LAN) my NAS which is directly connected to my router but it is possible to wake up my NAS from local LAN. 3/ A second OpenWRT router for test purposes connected to the first OpenWRT LAN through wired connection and DHCP. Regular port forward is simple and I haven't set it up yet. The provided router is in brige mode and I should not be behind NAT, after talking a couple of hours with customer support. In order to use the same url from both internal and external access, I was previously using NAT loopback on an edgrouter x. To avoid this you need to rewrite the source IP of the request as well, and that's what the snat rule ("NAT hairpinning" / "NAT loopback") is for. NAT loopback not working on r36114. I added lan and wlan to the Reflection zones list and disabled the Factorio-lan and Factorio-wlan rules. Node 3 in this image is hosting a web server on 192. 3:8080 Aug 5, 2025 · Hi, I use my openwrt router as my wireguard endpoint. NAT offloading is NOT activated. This way I can safely access the internet and my home services on the go. Loopback should work from that IP address. 6. 06. 23. This changes the DST IP from the Public to the LAN, and allows the packet to travel using the zones regular routing rules. 100 and 192. 34. It turns out that the problem was caused by installing Docker via the OpenWRT plugin/software manager. I have configured the loopback interface as a br-lan interface. Sep 14, 2025 · You need flat routing and accept-forward rule, not NAT. Inside the LAN the webserver is at 192. Up until now every thing Jan 10, 2025 · Hi, I have got a bit of a question regurding loopback NAT. So it's not accessible directly from the guest network (different vlan). Please add an option to select from which zones NAT loopback should be working. Is this a bug or is there a workaround for this issue? Aug 16, 2021 · Hi, I'm trying to connect to my domain name "www. Now, my NAS is accessible by domain from both ouside and inside (thanks to NAT Loopback). When I use luci-app-wol I am able to wake up my NAS only with etherwake but not with WoL. . Is it possible to restrict this somehow to the just the LAN network? The server for which I'm creating the port forwarding rules, is located in the LAN network. 2 in hope, it fixes some problems: One of them is, that the NAT loopback rules get not automatically created on interface up / fi Oct 30, 2022 · From searching on the internet, it seems that this problem is quite common, and the solution always is to enable some loopback/reflection of router WAN IP to LAN. here… Jan 27, 2025 · Because on my previous non-openwrt router, port forwarding worked properly. The device I've attempted this first is a spectrum sax1v1k and as I'm away now I've replicated it on a virtualbox vm. Is there something . Hopefully someone else finds this answer useful 3 Likes Enabling NAT reflection Forwarding ports 80 and 443 - Breaks HTTP/S on that vlan system Closed February 27, 2024, 8:22am 4 Jan 10, 2025 · Any idea how I could massage the OpenWRT firewall rules so it also knows that the 192. I have multiple internal vlans, and multiple firewall zones (e. 1 Like Cannot see hosted service with external IP and NAT loopback Hosting website: Rejected request from RFC1918 IP to public server address Hairpin nat broken not May 10, 2023 · In NAT loopback not working I asked about NAT loopback issues. I have configured port forwarding with NAT loopback from within luci but it doesn Jun 26, 2025 · I am new to openwrt. The problem is that in my network configuration, the OpenWRT router doesn't have the public IP assigned to its WAN interface, because it sits behind an ISP router with 1:1 NAT. 9w次，点赞4次，收藏31次。文章描述了在OpenWrt环境下，遇到本地局域网设备无法通过域名访问主机的NAT环回问题。尽管已开启WAN口入站数据和转发，问题依然存在。解决方案是发现端口转发未监听LAN口，通过修改设置添加LAN口监听后，成功解决了端口转发和UPNP的访问问题。 一、NAT Loopback/Harpin NAT即网络地址转换，它的存在有效地解决了IP地址不够用的问题，主要通过将内部的私有IP地址转换成可以在公网使用的公网IP地址。有兴趣的小伙伴可以自行深入学习。 Jun 9, 2023 · Describe the bug NAT loopback does't work on current device after upper kernel to 6. Split DNS sort of works, but DNS caching is not standardized and has caused all sorts of issues (especially with VPN stuff). Nov 14, 2022 · Good Evening, Desperately hoping someone can help me with this as I am pulling my hair out. I have done multiple network captures on eth1 and I am not seeing packets being rewritten on the first hop that should be marked as matching the rule. Keep in mind that your bridge device br-lan might need to be in promiscuous mode for it to work. 1' option type 'bridge' option proto 'static' option ipaddr '192. I have tried manually adding iptable rules with DNAT + SNAT. 1, which is "Powered by OpenWRT", but they don't me May 6, 2020 · Hey all, first time needed to post to configure something that up untill now didn't find a solution for. seperate DCHP, DNS, e Nov 21, 2024 · I'm from hungary using digi. But it works fine if i'm not connected to the LAN. While dragging, use the arrow keys to move the item. I've switched this week my isp to get higher down/up speed. 1) that it should resolve the host. 3 my domain name www. In OpenWrt, the underlying design for this is reflection. Oct 26, 2024 · Hey, just wanted to write here about using NAT reflection on my OpenWRT box (x86, 23. com" from inside the LAN but it fails. OpenWrt version r20134-5f15225c1e OpenWrt target/subtarget ath79/generic De Jan 20, 2017 · config interface 'loopback' option ifname 'lo' option proto 'static' option ipaddr '127. g. For example: my external IP is 3. I searched the forum before posting - and saw some similar queries - but they were either not in a double-NAT configuration - or the solution to their issue, didn't seem applicable to my scenario. How can i do one to one Nat via Luci ? My network is . If you're trying to reach a host by WAN IP/port from another network: Nov 19, 2023 · 背景 本人在设置设置完NAS的端口转发之后，出现以下情况： 在内网无法通过域名访问NAS，仅能通过内网ip访问 外网可以正常通过域名访问 原因 根据网络资料，可能是openwrt中的docker插件与NAT环回冲突 解决办法 Step1: 关闭端口转发中的NAT环回 這裡的問題在於，openwrt 的 nat loopback，實際上是斷斷續續出過問題的，加上版本的碎片化，你在嘈雜的互聯網裡，很難找到你的錯誤究竟是哪個。 這直接導致了，問題很多，答案也很多，但是大家的插口並不兼容。 The second question is: is it achievable to prepare such NAT loopback rules to have my NAS visible from internal network using my WAN IP/domain name (Horizon doesn't support NAT loopback, so everything has to be done on Linksys). Option reflection_zone is missing. In the meantime I managed to find the cause of the issue: If dockerd is installed and running, NAT loopback doesn't work (no reject but simply no traffic comes through). 05 Feb 18, 2023 · I'm trying to configure a Wireless Router running OpenWRT, with a WireGuard Client configured to connect to a Wireguard Server running on my home network. I have a new ASUS TUF-AX4200 Router which I am trying to setup as a repeater, taking an existing 5Ghz Wifi signal and pushing it out again further (in future, with a new SSID, password and even subnet, but that is not the current issue). (4 CPU core does not solve the problem, CPU usage are still below 1%) By default rules is negerate by openwrt is as Openwrt Nat Loopback - Video Nat Loopback : What is nat loopback and why is it needed to host a public opensimulator region?. Many DSL routers/modems prevent loopback connections as a security feature. Plus no more NAT loopback issue like I had in the past! (Is it because IPv6 is setup correctly from a LAN point of view? If I ping v4 my NAS from its domain name, it fails but ping v6 works. 9w次，点赞4次，收藏31次。文章描述了在OpenWrt环境下，遇到本地局域网设备无法通过域名访问主机的NAT环回问题。尽管已开启WAN口入站数据和转发，问题依然存在。解决方案是发现端口转发未监听LAN口，通过修改设置添加LAN口监听后，成功解决了端口转发和UPNP的访问问题。 Description When you create a Port Forward rule to access luci from Internet with the nat loopback option there is a problem with the reflection rule wich is not created, for this reason, from Internet you can enter on luci using the host domain:port but from lan you cannot. Hi Great people of OPENWRT! So i need to set a loopback for my self-hosted stuff for: 1: beta testing if I broke something and checking 2: uptime kuma to monitor so I can access remote to monitor currently showing all external domains and deader then Elvis 3) I work hybrid and I want to set my browsers up to default to the my domain for searching I can't seem to find a set of instructions The Aug 5, 2015 · Hello! I have NAT loopback on the port forwards on my router and I can access all of them using my external valid hostname. Jun 27, 2023 · OpenWrt 24. Sep 9, 2025 · 12zz September 10, 2025, 2:21am 6 I ran into the same NAT loopback issue again while reconfiguring everything, but this time I was able to pinpoint the exact cause. B seems like that's the problem and in most cases where two hosts are in the same LAN turning on NAT loopback solves the problem. example. 0' option ip6assign '60' config interface 'wan' option ifname May 23, 2021 · @A. The solution is described in this issue on GitHub (It's in Russian). After removing Docker, NAT loopback started working correctly again. 10 using a letsencrypt ssl cert for external access. After network configuration customization you need to reload or restart the network service to apply the changes. de from local lan? 真的是一个老主题了。我最近遇到这个问题。顺手解决了之后，就来答一波吧。 不同厂家对这个问题有不同的术语，以下是部分关键词： paloalto叫u-turn 华三、思科叫nat hairpin 深信服叫双向nat 还有叫nat reflection nat回流 nat loopback 有用的就是以下几个链接：如果路由器固件是老毛子、梅林、直接都有 Oct 27, 2017 · when the Interface is configured as non bridge Interface, the NAT loopback works without any problem with the connected devices to this interface, but, when the Interface will be configured as bridge interface, the NAT loopback won't work (I mean in this case, it won't work with the connected devices to this Interface) any advice please??? Jul 8, 2006 · In which case, I'd recommend using NAT (OpenWRT will do this out of the box) to hide your LAN behind the routers external IP Address, and just serve any random IP over your local network. modem-router in bridge mode-----> Openwrt makes pppoe connection----->192. It looks like nat loopback is not working. 0/24 with two hosts (+ router): 192. I've configured port forwarding which is working Feb 12, 2018 · Hello, Dunno if I m posting on right place, I have a TP-Link TL-WDR4300 with the latest LEDE version, it works fine but I need some port forwards to access external and internal. 194. 200 but Jan 11, 2023 · 文章浏览阅读1. 05 and 21. May 29, 2019 · Hi,&nbsp;I've found a thread about nat loopback but no answer. NAT loopback works only from LAN, not from other zones. e. hi, i changed the router of the provider today, after that router is my router running openwrt and nat i am also using home-assistant remote connect; everything worked fine until i changed the providers router. With these settings, http (s)://service. That said the site (and any other site I checked) lists the port as closed. Jul 27, 2023 · I have created on OpenWRT 3 different network interfaces. 2 with same results) even when dockerd is disabled and docker firewall, interface and device is deleted nat loopback still does not work. The generic form of this question is: We have a network with clients, a server, and a NAT Router. Then I've got another router showing an internal IP from router 1 on its WAN interface, let's call that one "router 2". ) Questions: Oct 18, 2023 · Network address translation | NAT hairpinning NAT hairpinning, also known as NAT loopback or NAT reflection, is a feature in many consumer routers where a machine on the LAN is able to access another machine on the LAN via the external IP address of the LAN/router (with port forwarding set up on the router to direct requests to the appropriate machine on the LAN). This notion is officially Aug 13, 2025 · A number of chains (mis-termed _rule) for each special target and zone. Dec 28, 2014 · I've been unable to find much information on whether my router (Linksys EA4500) supports NAT loopback, so I'd like to perform a test to tell me whether accessing my external ip address from within the network actually goes out to the internet and back or if the router is smart enough to keep the traffic local. Here’s how to do it. This changes the DST IP from the Public to the I would like to have my DMZ-connected visitors to be able to access services by their global DNS IP (wan) that are redirected to another zone, let's say lan. 200 ip which i want to be in One to One Nat. "Enabled" is the default state, so that's why you might not see an option reflection 1 in the config files. I'd never have thought I'd have to ask this again, but I can't seem to be able to forward port 80 & 443 on my openwrt box. I am reporting an issue for OpenWrt, not an unsupported fork. com resolves to this 3. My problem now is that I noticed that my NGINX reverse proxy gets my phones wireguard traffic from my LAN interface instead of my wireguard phone peer IP. With the parameter "option reflection_src internal/external" you can control whether reflected traffic is rewritten to your WAN or your routers LAN address. 70. In my case there are 2 LANs so option seems not to work unfortunately Jan 13, 2021 · Table of Contents Router vs switch vs gateway and NAT OpenWrt roles Router/gateway and double NAT problem with IPv4 or mixed IPv4/IPv6 Routers / gateways Switches and client APs OpenWrt as cascaded router behind another router (double NAT) Device as router, internet ISP device as modem-bridge Device as double-NAT router with DS-Lite Device as router with disabled NAT, additional routing rules Jan 27, 2020 · NAT Loopback 大流量情况下，对路由器要求高，造成传输效率低，搞不好就死机了。 不知你使用的工具对处于局域网和互联网的同一机器优先级判定是如何的，可以同时指定互联网 DDNS 的域名，然后在指定一个内网解析的域名，这样处于互联网时通过端口转发访问，处于内网是优先使用内网地址直链 Port Forwarding Port 80 & 443 EDIT: It seems to be NAT reflection which I can't get to work. 3.