Openwrt disable all ipv6. 1 [IPTV] LAN_PHY_IF=eth0. all. I use RB5009 with installation on a clean system after reset. Thanks for your help. All ipv6 capable devices will assign themselves link local addresses, which have nothing to do with internet access and are rarely even used on general LAN connectivity (besides icmp). Installating OpenWrt is then done as follows: In order to completely remove IPv6 support and related packages you also need to ask the imagebuilder to do so by also passing this option to the make command: CONFIG_IPV6=n. Also, the default installation of the web interface includes the package luci-proto-ipv6, required to configure IPv6 from the luci web interface. Step 3: Disable the DHCP server on the lan interface It is critical that the DHCP server is disabled for the lan interface since only one DHCP server may be running on a subnet at a time. My actual /etc/config/dhcp, anonymized: config dnsmasq option domainneeded '1' option localise_queries '1' option rebind_protection '1' option rebind OpenWrt 22. It accepts the same UCI configuration syntax as fw3. in the build directory for qca-nss-drv can you provide the output of: egrep -r -B4 -A5 "NSS_DRV_WIFI (O|_)" Also, to reduce noise, disable all the NSS client drivers and only select the following NSS modules and options. You can performe them in the console of the router but the preferred way is via SSH. Learn how to openwrt disable ipv6 for better security with simple steps. 07704-2908a90) 运营商 联通 smartdns来源以及版本 OpenWRT上已经安装好的 smartdns 1. Hello OpenWrt community! I'm looking for some assistance or pointing in the right direction on how I can look to turn off IPv6 on my OpenWrt install, which is essentially an out-of-the-box setup on a Banana Pi R3. I was After removing my IPv6 through the method I've found on a number of sites for openwrt, I am still getting a IPv6 address. But, it won't make any easier to configure openwrt if you disable IPv6, you will only save some bytes from your device storage, possibly allowing you installing more packages. OpenWrt Disable IPV6 The following steps will disable IPV6 on your OpenWrt router . 3. The issue I have is one of my LAN clients (wireless) doesnt like IPv6 (a Sony Smart TV) which causes it to What is the proper way to disable ipv6 on pppoe wan interface? I tried: uncheck Enable IPv6 in wan interface options It didn't work. conf to persist reboots). Routers If you have configured your router to connect to Mullvad VPN then you can find help in the Troubleshooting section of our router guides if you get a DNS leak. I'm not bought in to using IPv6 yet and frankly, I haven't messed with all of its settings enough to feel comfortable that I can fully protect it. It is, practically, impossible to correctly get IPV6 working only using LuCI. Once this is all done, we can “Save” and “Save & Apply” the settings we’ve made. 1 build for Ubiquiti Edgerouter-X (ER-X) Host Showing IPV6 Address tmomas February 16, 2019, 9:43am 2 I recently bought a new router which I have not debranded yet, so I can't turn off IPv6. Aside from the many reasons that this support should be on and the direction everyone should be moving which I agree with, I'm looking to understand how I can flip the switch to Hi, in menuconfig, Is it a big deal to remove all ipv6 settings in the menu? I dont need it, so if it is possible i would remove them all. Openwrt by default will give out site local addresses, but Jul 24, 2016 · On initial installation (or settings reset) OpenWrt generates a Unique Local Address prefix and assigns ULAs to all the devices in the network, allowing them to communicate internally via IPv6 even without global IPv6 connectivity. The problem is that there is no option to assign a static IPv6 address so I have to manually update it when I reboot the Pihole. They give you an address and then you work with that. my isp don't use ipv6 (sic!), how to disable ipv6 dhcp only for this wan interface? On some forum suggest to remove wan6 from config, but some people said this can create "race condition". 0 or higher. It is recommended to turn off IPv6 (the method is described later in this WiKi), or switch the main route to IPv6; If you have questions or have better suggestions, please send an email to techsupport@friendlyarm. Follow the following steps to disable IPV6 on your OpenWrt router: The default firmware provides full IPv6 support with a DHCPv6 client (odhcp6c), an RA & DHCPv6 Server (odhcpd) and a IPv6 firewall (ip6tables). Using IPv6 Linux If you see an IPv6 DNS address then try to enable IPv6 in the Mullvad app settings, or disable IPv6 in Linux. If your ISP does do IPV6. My Proxmox gets the IPv6 from my Openwrt router using DHCPv6 and all the VMs also gets their global IPv6 addresses from the router. All recent firmware versions (up to at least 2. In my LuCI I have disabled every possible IPv6 property. x. If it's out there, then appologies for any repetition. If this is not the case, you will need to upgrade first. com; I also don't want to entirely disable IPv6, I just don't want OpenWrt giving out DNS addresses to my LAN clients that aren't my pi-hole, which isn't happening on IPv4 but is happening on IPv6. 514795] Segment Routing with IPv6 Sun Dec 14 10:14:24 2025 kern. notice dnsmasq: found already running OpenWrt Disable IPV6 The following steps will disable IPV6 on your OpenWrt router . My VPN VM is IPv6 inbound only even though I have a public IPv4. Providing IPv6 default route with DHCP Announce IPv6 default route for clients using the ULA prefix. Hi, Is there a recommended “standard” range for IPv6 home use? Most of my devices use IPv6, but my router has always just handled it for me so I have never really learned its makeup. 20. info kernel: [ 1. A second "wan_6" interface appeared and it's functional and used. If it’s impossible, please tell me which rules to add to the firewall to block all IPs greater or equal to 192. 123. 026. . 问题现象 ipv6一直是失败状态，无法获得ipv6域名解析。 另外一个问题： recv failed, server 8. 100 I’m using both IPV4 and IPV6 I will have better sleep once this is set. Dynamic IPv6 does not matter since I only match the last static prefix in the router firewall and use the script to update the DynDNS hostname. 4) and my ISP is Now Broadband, who support IPv6. Aug 7, 2023 · how to disable completely ipv6 on openwrt You can't disable IPv6 completely. 1 涉及的配置 (注意去除个人相关信息) o What I had done is disable DHCP on Pihole and use OpenWRT's odhcpd. inf… You can ask all you want, that is no problem. disable_ipv6=1 Reload network/reboot and now your router will be pure IPv4. This works great for my case. What could I do? Sun Dec 14 10:14:24 2025 kern. Q: Why do i If your main network is IPv4, and NanoPC-T6 works in IPv6, the computer may not be able to connect to the Internet. 06. 국내 isp는 개인에게 ipv6을 서비스 하지 않기 때문에 따로 ipv6을 이용하지 않는다면 굳이 ipv6 관련 기능을 켜 둘 필요가 없다. 05. br-lan: port 7 (rax2) entered forwarding state do nothing in nat_hw_enable init_all_vif_name DEVICES=wifi0 wifi1 dev=wifi0 dev=wifi1 wifi_macfilter iwpriv ra0 set AccessPolicy=0 iwpriv rax0 set AccessPolicy=0 iwpriv ra2 set AccessPolicy=0 iwpriv rax2 Flash Layout Cudy TR3000 Flash Layout Layer0 SLC SPI-NAND flash memory chip, spi0. com shows me that my router is still having IPv6 DNS. 0-rc4 incorporates over 4300 commits since branching the previous OpenWrt 24. 0-ipq40xx-generic-avm_fritzbox-4040-squashfs-eva, but the IPv6 address still is assigned to the br-lan interface. Great job! Thank you! After adding my sites /ip firewall address-list add address=@my_site@ tracert @my_site@ shows that at step 2 the node is 172. We help companies of all sizes seamlessly adapt their infrastructure for growth, offering Wi-Fi, IoT, security, and remote management solutions. In /etc/config/dhcp, in section config dhcp 'lan', I've added option dhcpv6 'disabled' and How to set this part (disable ipv6) through uci command in latest openwrt ? It seems doesnt work like previous versions ? I use openWrt on a router, in a straightforward router mode (behind ISP’s modem in bridge mode). 3 and traffic goes to the VLESS tunnel, but the site works very very slowly. To allow resolving the internal IP address of the SOCKS5 proxy you may have to disable "DNS rebind protection" in OpenWrt under Network > DHCP and DNS. Hi, I have read posts about disabling IPv6 on OpenWRT standard builds, but cant seem to find an answer to my question. Disable ISP prefix delegation to prevent IPv6 leaks on VPN client. While it can be done you might be better off thinking about why you're disabling IPv6 and if it's actually necessary to do so. 2 iptables: No chain/target/match by that name. ipv6. WireGuard on a router (OpenWrt) Last we need to go to the DHCP Server sub-tab “IPv6 Settings” and disable all three of: RA-Service, DHCPv6-Service, and NDP-Proxy. In /etc/config/network, in section config interface 'lan', I've removed option ip6assign '60' and added option ipv6 '0'. default. 0) can disable firmware signature verification to flash OpenWrt. Jan 6, 2021 · How to disable ipv6 on the router Installing and Using OpenWrt Network and Wireless Configuration asdffdsa January 6, 2021, 10:14pm OpenWrt Disable IPV6 The following steps will disable IPV6 on your OpenWrt router . Regards. Only the main changes are listed below. 123 (Public IPv4 Adress) Address 2: ::1 I want the AAAA record Address 2: ::1 to be gone. Follow the following steps to disable IPV6 on your OpenWrt router: I remove/disable as much ipv6 as I can, and still find references to ipv6 in my log. Too many kernel / firewall / whatever modules are nowadays dual-stack, so some ipv6 support is always compiled in. Follow the following steps to disable IPV6 on your OpenWrt router: Mar 19, 2024 · In my instance I installed a new OpenWRT router on a network as a replacement to their old ISP router. com Address 1: 123. disable_ipv6=1 After reboot IPv6 addresses still show in interfaces list : ( Any more ideas, how to be free from annoying IPv6 stuff? I'm investigate log, and I found the next rows: Thu Feb 25 13:19:51 2016 user. The purpose of the script is to automatically generate and update IPv6 DNS host names on the OpenWrt/LEDE router, making access to devices by name (either IPv4 or IPv6) on your network a snap. This is a cheatsheet for quick lookup of networking UCI options, useful for experienced users. how to disable completely ipv6 on openwrt You can't disable IPv6 completely. But in the APs Associated tab the appear my wireless connection with IPv6 host: How could I disable all IPv6 configuration? I want to use only IPv4 in my network. I can i prevent the wifi from passing this traffic Is there a way to completely disable ipv6 support from LuCI without building a custom image? Or what steps can I take from LuCI to disable/remove as much of it as I can? How to disable IPv6 entirely in 18. OpenWRT Disable IPV6 - How to disable IPV6 for OpenWRT Router STARTUP HAKK 14. My router currently has the settings: ULA: enabled Unique local address: fdaa:bbcc:ddee:0:5eb1:3eff:fe14:8a55 ULA prefix / length: fdaa:bbcc:ddee::/64 IPv6 address allocation: stateless I assume I uncheck ULA I am connecting my OpenWrt router to my ISP router. Let's see how and why disabling IPv6 on GNU/Linux systems and on OpenWRT routers. It seems that by default openWrt enables IPv4 and IPv6 for both WAN and LAN. Improve your router’s safety and avoid potential risks from IPv6 attacks. I'm quite confused with SLAAC, DHPv6, Port Forward and Traffic Rules with IPv6, it doesn't seem to be straightforward, like IPv4. Give it a minute at least to make sure all clients are disconnected. I'm not entirely sure what else to do to remove this. On initial installation (or settings reset) OpenWrt generates a Unique Local Address prefix and assigns ULAs to all the devices in the network, allowing them to communicate internally via IPv6 even without global IPv6 connectivity. stop it No effect. 8. I feel IPv6 on LAN complicates the configuration, and I see very little benefit to it. 1 Address: 127. 03 and later ships with firewall4 by default, which uses nftables as a backend. com Server: 127. There's various services you can disable and a bunch of sysctls you could tune to disable IPv6 link local addressing on interfaces but there's no high level configuration options for that. Sep 17, 2025 · Learn how to openwrt disable ipv6 for better security with simple steps. Is there an automated solution to this? You can disable IPv6 globally using this sysctl value (add to /etc/sysctl. 38. 17. disable IPV6 openwrt. conf - remark all rows about IPv6 and put this: net. Probably easier just not handing out IPv6 DNS and force all lookups via your "Smart DNS" - you'll probably still lose IPv6 connectivity as not all IPv4 only DNS offer IPv6 records (they can, but some don't). 8:853, Bad address 运行环境 固件型号 OpenWRT OpenWrt Rockchip / LuCI Master (git-23. WARNING: disabling IPv6 may have unintended consequences. However, browserleaks. conf. 0 128 MiB Layer1 BL2 (u-boot) 1 MiB u-boot-env 512 KiB factory 2 MiB bdinfo 256 KiB FIP 2 MiB ubi (UBI Partition) 64 MiB Layer2 kernel Linux kernel (raw image) rootfs mounted: “ /rom ”, SquashFS size depends on selected packages rootfs_data mounted: “ /overlay ”, UBIFS all remaining free space Layer3 To install OpenWrt, you should have a TP-Link firmware installed with version 2. BUT the important distinction is what kind of addresses they get. uncheck every other option related to ipv6 in wan No effect. Hello, I have a Mikrotik router and some OpenWRT APs in my network, I don't want to use IPv6 yet, I have disabled all IPv6 related configuration (I suppose). I have a purely ipv4 network, all my lan based devices have ipv6 disabled. thanks list : ( Then I'm edit /etc/sysctl. 1#53 Name: my. delete the wan_6 Appears back. net. I know very little on the subject, so I wanted to run a few questions by you guys before I do something stupid with my config. 10 release and has been under development for over one year. It does this by creating a hosts file giving local DNS names to IPv6 addresses that IPv6 enabled devices I've tried to disable IPv6 on my Fritzbox 4040, image openwrt-23. It's able to receive my both ISPs' PD and has SLAAC and both DHCPv6 working, together with DNS resolving for LAN devices domain names. 0. stop odhcp6c in Startup It's not listed there!!! kill it from command line It gets Contribute to mai-gh/openwrt_setup development by creating an account on GitHub. At the same time, the solution on OpenWRT, configured to connect to the same VPS server, shows good speed. Hi there, i want to prevent the local DNS server on my OpenWRT router to announce IPv6 records when querying the hostname by which the router is reachable from the Internet. Restarting a DHCP server and flushing its table is not a good idea, unless you make sure to disconnect all the clients from your network first (disable WiFi AP's). Unless you disable ipv6 on all the devices, they will still "receive" ipv6 addresses. host. [IPTV] WAN_PHY_IF=eth1. Worth to mention that: ~# tracero… OpenWrt 25. however, every time an android phone / ipad device is connected to my wifi, i get flooded with ipv6 5353 traffic. The only thing I could grasp after going through the forums is that SLAAC likes to change the IPv6 address up to a certain time and the device doesn't request for DHCPv6(?) as SLAAC takes care of that and it's impossible to set an IPv6 Static Lease from the router Our global team develops innovative, cost-effective hardware and software that delivers dependable, secure network connectivity. If you, successfully, blocked the IPV6 from getting past the wan port it would involve/affect IPV6 everywhere on your lan For example, you have IPV6 open for service but your ISP does not, you IPv6 gateway Set up IPv6 tunnel broker or use IPv6 NAT or NPT if necessary. In general one could say that completely disabling IPv6 is not a supported configuration anymore [when using prebuilt images]. Follow the following steps to disable IPV6 on your OpenWrt router: Afaik disabling IPv6 is not a 'supported' option in openwrt. All the steps are performed via the command line. 03. disable_ipv6 = 1 And your OpenWRT will essentially drop IPv6. 6K subscribers Subscribed net. So, I typically disable it on my OpenWRT devices. 12. GitHub Gist: instantly share code, notes, and snippets. I already have a DHCPv6 server on the network but also no actual IPv6 setup or upstream connectivity. root@openwrt:~# nslookup my. 2022. Follow the following steps to disable IPV6 on your OpenWrt router: OpenWrt Disable IPV6 The following steps will disable IPV6 on your OpenWrt router . I'm running the latest standard build for a BT Home Hub 5 (22. Services are designed to run in dual stack mode. The UCI firewall configuration in /etc/config/firewall covers a reasonable subset of NetFilter rules, but not all of them To provide more functionality, include mechanisms are available. mhakr, rjezy, 7zha09, 3g9a, qc6dt, sddkd, xbmv, jlipd, 0ine, ndizhi,