Opnsense ipv6 gateway. opnsense itself can ping via ipv6, but my LAN side cannot.
Opnsense ipv6 gateway IPV6 has been working perfectly (ISP Spectrum) with MerlinWRT for years. I've configured a basic IPv6 setup (internal LAN) just for testing purposes. 7_3. ULA: Unique Local Addresses I started trying to setup ULAs for DNS on the inside, but I'm not certain with my actions here. All different paths that are available to your firewall can be managed from this page, which can be found at System->Gateways->Configuration. 8-amd64 in a Proxmox virtual machine. Jul 25, 2024 · On the WAN interface i configured IPv4 using a static IP and IPv6 using DHCPv6. I have all my VLANs correctly setup and clients are receiving a IPv6 address. To Reproduce Steps to reproduce the behavior: Do a fresh install of OPNsense and run the setup wizard. Opnsense gets an IPv6 WAN address from my ISP, and can itself ping remote servers with IPv4 and IPv6. I have my WAN set to DHCP6 and this gives me a link local (fe80::) IPv6 address in the OPNsense gateway list. DHCP. This article shows how to set up TunnelBroker, Hurricane Electric’s IPv6-in-IPv4 tunnel, with OPNsense. 7 Legacy Series WAN_DHCP6 gateway Aug 24, 2021 · I have disabled IPv6 on one of the firewalls, created an interface group of my internal interfaces, and added a floating rule in the style of "allow ifgroup_internal -> IPv6 -> !ifgroup_internal, allow ifgroup_internal -> IPv6 ->This Firewall", which is the best I can come up with right now. tobatz, April 15, 2024, 09:37:18 AM Previous topic - Next topic Oct 14, 2023 · Describe the bug IPv6 gateway reported as offline when there is a ULA address on the WAN interface because dpinger binds to the wrong address. Here is my scenerio for how my OPNSense Router is configured: Sep 5, 2025 · TL;DR - The Short Version My ISP only provides a single /64 IPv6 prefix, making it impossible to give different VLANs their own native IPv6 subnets. Unable to get IPV6 working from LAN-WAN I'm about to lose my mind, I just switched to opnsense after a few years of merlinWRT, previously used pfsense for a few years. Is it just that IPv6 support in OPNsense just isn't ready for primetime? Or is it just poorly documented? Sep 14, 2024 · That’s it – you should now have a working OPNsense internet router with IPv4 as well as IPv6 connectivity. 7 the gateway for the DHCPv6 configuration is shown disconnected in the Web-GUI. You'll need DHCPv6 Prefix Delegation for this, which also needs to be supported by the upstream router. 1 firewall with Dnsmasq as the DHCP server, and additionally configure ULA prefixes for improved local addressing. Oct 5, 2021 · I was assigned this address by the IPv6 range provider. OPNsense has its ipv6 gateway set to the link local address of my ISP's machine. Gateway groups / Multi WAN Multi WAN scenarios are commonly used for failover or load balancing, but combinations are also possible with OPNsense. Jun 23, 2024 · OPNsense 24. While I successfully get an IPv4 address assigned, and it seems like an IPv6 address is also assigned, the WAN6 gateway only displays a link-local IPv6 address. Quote from: Maurice on February 13, 2024, 07:40:40 PM A SLAAC WAN can only provide IPv6 connectivity for OPNsense itself, not for devices in its LANs. I ran pcap and saw neighbor solicitations from OPNsense to the ISP link local address. Introduction OPNsense supports native IPv6 as well as tunneled IPv6. 0. 2/27 address for IPv4 from the modem, and sometimes I eventually get an IPv6 address, but my gateway monitoring has 100% loss on the IPv4, and it doesn't even try to ping the IPv6 monitoring address. But in the WebUI, the gateway is marked as orange at status, and when I hover over it, I get the message: "Misconfigured gateway IP". If you are unsure, chances are high that you simply don't need the setting in your Feb 14, 2024 · I also have a non-local default gateway for ipv4 as well (ovh assigns /32 to me for ip address with default gateway outside of this subnet obviously) and this works fine in opnsense: Jan 5, 2025 · I'm currently facing an issue with my setup on OPNsense when attempting a PPPoE login. Oct 18, 2021 · Hello! I try to set different IPv6 gateways for different interfaces. Connect the WAN interface to a router that sends a ULA prefix (fd00::/8) in addition to the GUA prefix (2000::/3). May 25, 2025 · This step-by-step guide shows how to set up DHCPv6 on your OPNsense 25. I have run in to an odd problem, in that I can no longer enable an IPv6 gateway. So I need to figure out why my LAN clients arent getting any of that information. I have a MultiWan Set-up with IPv6. Cheers Maurice Thank you for replying I changed from SLAAC to DHCPv6, with no luck. Print Go Up Pages1 User actions OPNsense Forum Archive 23. When I add an IPv6 gateway on my WAN interface via the web interface, it does not create a route to the gateway. But if i ssh into the router and ping6 the monitor IP it works. Feb 13, 2025 · With OpnSense, it is possible to create firewall aliases of type "Dynamic IPv6 Host", that specify only the EUI-64 part of the address and are provided with the 64 bits long prefix of the (V)LAN interface. IPv4 connectivity works flawlessly, but I can't seem to get proper IPv6 functionality. I'm running into strange behaviour with IPv6 Gateway Groups in Firewall rules. the gateway shows as 'pending' It is setup with gateway monitoring pinging Google's DNS. If you’re based in the US and you use Netflix, you might not want to follow these instructions. I've seen a whole lot of IPv6 questions in here and not a whole lot of actual useful answers when it comes to making IPv6 work on OPNsense when it's worked fine on other platforms. All I know is that Step 1 is to enable a Virtual IP alias for each subnet. This guide will setup a OPNSense behind a FB, handover delegated prefixes from the provider and configure local interfaces on the OPNSense to cope with dynamically changing IPv6 prefixes. Feb 17, 2024 · When adding the IPv6 address to Tunnel Address in the WireGuard Instance configuration, specify a /127 mask, rather than a /128 Then, when creating an IPv6 Gateway for the tunnel, specify the IP address to be another IPv6 address that is within the /127 subnet of the Tunnel Address Jan 15, 2025 · IPv6 gateway monitoring problem - bug?route add -host -inet6 2001:4860:4860::8888 gw fd00::52e6:36ff:fe01:3dca dev vlan0. set the specific IPV6 gateway, into a rule that negates our own prefix ) -> Thus when something does not belong to our own "ipv6 networks", we route it out a specific IPv6 WAN interface. Jan 24, 2016 · [SOLVED] A bit confused about the Upstream Gateway?If there is a separate upstream link via the Interface then it may not be advertised due extra routers between the gateway and your interface and/or because the network was set up statically and doesn't automatically set an upstream gateway via e. Apr 28, 2024 · then it reports an IPv6 address, a Gateway, DNS servers and the IPv6 prefix delegation (2001:1111:1111:9700::/56) Could it be that I need to configure OPNsense differently to link in properly with the modem? Gateways and monitoring The address you are trying to monitor should be reachable using the interface the gateway is attached to, either directly or using a static route (check System ‣ Routes ‣ Status). You can test the latter here or with a simple Google test. Jul 25, 2022 · I'm having issues getting public IPv6 addresses out to the LAN clients. With the above setup, this "IPv6NET" interface acts as a second WAN interface, specific for IPv6 communication. Unchecking that and saving results in Mar 9, 2024 · Hi OPNsense team. Which IPv6 address should be advertised to the client as default gateway? The static IPv6 address or the link-local address? In my setup the link-local address is published to the clients, is this the intended behaviour? br Mar 12, 2021 · Recently my ISP implemented IPv6 and I discovered it by accident while I was connected directly to the GPON router. DHCPv6 Server not Feb 1, 2024 · I currently have ipv6 disabled on LAN since LAN devices are experiencing high initial connection latency due to trying ipv6 addresses and timing out. Gateway monitoring is enabled on the IPv6 Gateway and despite it showing as Offline, I have full IPv6 connectivity, confirmed with IPv6 test websites and ping6 to google. Your clients on LAN should now get a local IPv6 address from DHCPv6, the outbound NAT rule should allow you to pass the IPv6 tests and communicate with IPv6 internet hosts via the single IPv6 WAN address that the T-mobile home router gives out. Apr 26, 2025 · This is a work-around for those of us wanting to combat bufferbloat with FQ-CoDel and ECN as per the OPNsense guide, but are seeing high packet loss on the IPv6 gateway (specifically on upload) with the shaping applied. 0004 and everything seems to work normally. Both have a gateway that monitors the connection. Let this be: FD69:420:B33F:1::1/64 Now what? Do I need to enable DHCPv6 in the Interface configuration All traffic in OPNsense travels via interfaces. I can access the IPv6 enabled outside world from within the Opnsense server. Under RA for BRDG, I have RA set to 'assisted', source address as automatic, checked 'advertise default gateway', under DNS options checked 'Use the DNS config of the DHCPv6 server' Feb 13, 2024 · IPv6 Rules with Gateway not working. Jan 4, 2019 · Hi. Both WAN's work great in terms of IPv6 individually (e. . 1. The solution is to use a private ULA (Unique Local Address) range for all internal VLANs and create a single IPv6 Outbound NAT rule in OPNsense. Gateways define the possible routes that can be used to access other networks, such as the internet. Gateways: Name: ISP, Interface: WAN, Prio: 2 (upstream), Gateway: link local IPv6 of next router (with modem) Name: Tunnelbroker, Interface: TUNNELBROKER, Prio: 3, Gateway: remote IPv6 from broker Interfaces: WAN - IPv6: DHCPv6 OPT2 - IPv6: Track interface . Remember that there is no NAT in a (sane) IPv6 configuration. Got to "System > Gateways > Single Oct 29, 2023 · WAN_DHCP6 gateway missingOctober 31, 2023, 06:49:09 PM #6 Now there definitely seems to be a routing issue. There is an IPv6 connection from my ISP and from a Tunnelbroker. Oct 29, 2024 · BRDG: IPv6 set to 'track interface' with parent interface of WAN1, assigned a prefix ID of 1, allowed manual adjustment of DHCPv6 and Router Assignments. You can also use the 'track interface' option for the WAN in OPNsense - YMMV. Feb 28, 2021 · From ‘disabled’ to ‘Assisted’ Save all settings and ensure all services are restarted. I am using EE 4G internet (UK) --> Zyxel N7101 --> OPNSense and cannot get IPv6 to work either despite literally trying every possible combination. Thus, the gateway appears down as there is no route to it. It is also able to send ULA addresses to LAN clients via DHCPv6 with my private static prefix, allowing all LAN machines to ping/connect each other via IPv6. Feb 23, 2025 · If you want to make one or more clients reachable from the internet, like you need to do when you are doing file-sharing, follow the below to make it work for Pv4 and IPv6. The "IP address" field in the default created WAN_DHCP6 gateway is set to "dynamic" but the gateway field stays empty. Let's say that Web Server A is in a subnet. So I configured OPNSense to get an IPv6 address via DHCPv6. May 30, 2023 · Hi Guys, very occasional poster here and for the most part OPNsense has been pretty faultless. May some basic stupid question, but the whole IPv6 topic is quite new for me. In the gateway setting I enabled "Upstream Gateway". The technology used to offer multiwan is called “policy based routing” or “source routing” and depends on the firewall functionality of OPNsense. Netflix now blocks TunnelBroker. Feb 3, 2018 · I had ipv6 working pretty well on my consumer router but can't seem to figure how in opnsense. May 8, 2023 · I am seeking your assistance in configuring IPv6 on OPNsense 23. The reason I use dhcpv6 is it seems to be the only way to get the ipv6 addresses of the hosts in the dns. This works Dec 22, 2024 · Routing IPv6 traffic through OpenVPN TAP tunnel - No gateway Started by kb1sph, December 22, 2024, 05:47:04 PM Previous topic - Next topic Mar 27, 2021 · My IPv6 setup with my ISP is by prefix only. With version 24. This guide is based on a Vodafone Cable connection (formerly Kabel-BW) and an AVM Fritz!Box Cable May 18, 2023 · Interface Overview shows an address (/128), a link-local address (/64), a delegated prefix (/59) and 2 IPv6 DNS servers but no IPv6 gateway. Assign the OPNsense interface in the same subnet a Virtual IP alias. g. Below are my configs. opnsense itself can ping via ipv6, but my LAN side cannot. I can get IPv6 addresses in WAN and LAN but it inconsistently passes IPv6 to clients and clients cannot ping local or external IPv6 addresses. When I manually add the route via SSH Jan 12, 2024 · When I turn on Track Interface (WAN) for my Servernet VLAN, OPNsense automatically creates a new gateway for me, "SERVERNET_TRACK6", which steals the default route for IPv6 traffic, rendering the protocol useless in my LAN. By default, WAN and LAN are assigned, but many more are possible, like GUESTNET (captive portal) and PFSYNC (high availability). This translates the private ULA addresses to the WAN's public IPv6 address, giving every device on Introduction The AVM Fritz!Box, or FB for short, is a popular home router for DSL, Cable and Fiber in Germany. IPv6 has long been shipped as a default option in OPNsense and received gradual improvements over the years, but configuration complexity, ISP problems and sometimes also software bugs can cause connectivity to fail or not establish at all. TiA IPv6 behind Rented Gateway Hello everyone, To start off, here is my setup: Internet -> Rented Modem (Comcast/Xfinity) -> OPNSense -> Switch -> Device I managed to force the OPNSense box to use a specific IP and DMZed the IP from the gateway. System | Gateways | Single . Apr 15, 2024 · Gateway monitoring issue with multiple IPv6 WAN addresses Started by markus. I've been attempting to get IPV6 working on opnsense with zero luck. Every time I go in to the config screen, 'Disabled' is ticked. Has anyone else experienced this behavior? I wanted to ask here before filing a bug report. Sep 26, 2018 · It's very unusual for an ISP to expect you to set your WAN IPv6 address as a static. If you use IRC or need access to SMTP over the TunnelBroker connection, Hurricane Electric Jan 21, 2025 · I get a 192. Specifically, I would like to know how to assign IPv6 GUA addresses dynamically provided by the Internet provider and ULA addresses simultaneously on the LAN interface. Checking the routing table, I only see ipv4 entries. bzy 3bd9s 1avf3 lvosbt ira 2w6n orn5ewg epfi5e sy yjuk