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Opnsense disable ipv6 of Technology
Jun 6, 2018 · So, the Disable IPv6 tickbox in theory needs to apply those two lines to the configuration in addition to what it already does. Also, you must specify as "TCP4" or "UDP4". However, you will probably be completely unsurprised to hear that having all of that still results in OpenVPN creating an IPv6 gateway no matter what.Jun 25, 2023 · Now go to Interfaces: [LAN] and set "IPv6 Configuration Type to "Static IPv6". Under the "Static IPv6 Configuration" block, set the IP address to ::1 and dropdown 128. Click Save. Now you should be able to go to Services: DHCPv6: [LAN]. Uncheck "Enable DHCPv6 server on LAN interface.It will make DNS very flaky. I had to call Comcast in order to get this turned off and then everything ran perfectly. Try the following settings which work for me: On your "wan/internet" interface: IPv6 Configuration Type -> DHCPv6. DHCPv6 client configuration -> Basic. Prefix delegation size -> 59.IPv6: Track Interface. System > Settings > General: Networking. Prefer IPv4 over IPv6 – checked. DNS servers – left blank. Allow DNS server list to be overridden by DHCP/PPP on WAN – unchecked. Do not use the local DNS service as a nameserver for this system – unchecked. DHCPv4.I need to find a way to prevent opnsense from assigning that autoconf EUI64 address on the WAN IF or else all IPv6 traffic originating from the firewall itself fails. By default the router is using 2604:5500:30c8:0:ae1f:6bff:fe83:22f7 instead of the DHCPv6 assigned address 2604:5500:30c8::662; all my LAN clients do get an IPv6 address via ...Adding a new SSL VPN server is relatively simple. We’ll start by adding one that uses our two factor authentication. This setup offers a good protection and it is easy to setup on the clients as each client can use the same configuration. Go to VPN ‣ OpenVPN ‣ Servers and click Add in the top right corner of the form.since updating to 23.1 after my firewall does it's weekly reboot, I need to disable any one of my internal vlan interfaces on opnsense and re-enable to make IPv6 work. my WAN always gets it's ipv6 ip but something about the routing to the internal interfaces doesn't work.It’s clear that we do not live in a country that was built with accessibility in mind. Disabled people and disability activists have spoken out about how they hope remote work oppo...All settings (specific to my router) are below. Modem was supplied by Spectrum. Navigate to Advanced Settings -> IPv6 and select these settings: IPv6 = ON. Internet Connection Type = Dynamic IP (SLAAC/DHCPv6) Expand the hidden Advanced tab. Get IPv6 Address = Auto. Prefix Delegation = Enable.May 5, 2023 · So, I'm trying to get all devices to use pihole for dns. IPv4 is working perfectly. IPv6 not so much. I have input piholes ipv6 address into the DHCPv6 service page and while it is served, opnsense still includes its own IP address. My assumption is that by supplying an address in DHCPv6, opnsense should not be advertising its own.Yes, see the first test "from Notebook", this is in one of the VLAN with /64 delegation, this works fine. The same from my Linux server in the other VLAN with /64 delegation, no problems. The problem with the IPv6 connection is only on the OPNSense itself. OPNSense Interface -> Overview -> WAN -> IPv6 address:Hello, I am using OPNsense 23.7.10_1-amd64 and have a strange problem with Unbound. If I have set Unbound => General => Outgoing Network Interfaces to ALL (the default), I get a timeout from Unbound with the following query:Although, he mentions that he cannot explain why that is the case. Indeed, "disabling reply-to" worked in my case. I checked the box for HTTP and SSH on my WAN interface. You can find the location of the check box in this screenshot: settings to be changed in the rule settings, e.g. of the SSH-allow-rule. There is also a thread on the ...Select "Block" for the deny rule. Once again the source address and port needs to be set to "any" device on the LAN network. For this block rule, the destination needs to be "any" because we want to block any attempts to use any other DNS server. Select port 53 for DNS like with the allow rule.I need to disable IPS and issue a reboot to recover. Attached the screenshot on the console. igb1 is the WAN interface. It seems some IPv6 forwarding isn't working properly when IPS is enabled. I've only enabled OPNsense-* rule-sets in the Intrusion Detection service.If you are an “able-bodied” traveler, there are many things that you can do to help improve travel for those of us with disabilities. If you are an “able-bodied” traveler, there ar...Teredo tunneling is a protocol that is part of the next generation TCP/IP protocol called "IPv6." Teredo tunneling enables devices using the IPv6 protocol to communicate through a...ipv6 gateway (when ipv6 is turned off) and intermittant PPPOE connection loss. Hi all - trying to figure out this problem with opnsense. I have PPPOE wan connection and I have turned off ipv6 on both the LAN and WAN interfaces but under GATEWAY it still shows an ipv6 listing. I cant stop this and delete it because it automatically turns back on ...Configure the WireGuard VPN Server. After installing the plugin, let us start configuring the WireGuard VPN Server. Go to the "VPN > WireGuard" page and click the "Local" tab. Click the "+" button to add a new WireGuard server. Click the "Enabled" checkbox. Give the server a "Name" of your choice.Disable TLS session tickets - increases privacy but also latency. Fallback Resolver. This is a normal, non-encrypted DNS resolver, that will be only used for one-shot queries when retrieving the initial resolvers list, and only if the system DNS configuration does not work. Block IPv6. Immediately respond to IPv6-related queries with an empty ...Dnsmasq DNS. Dnsmasq is a lightweight, easy to configure, DNS forwarder, which can be used to answer to dns queries from your network. Similar functionality is also provided by “Unbound DNS”, our standard enabled forward/resolver service. In some cases people prefer to use dnsmasq or combine it with our default enabled resolver (Unbound).Re: Default deny / state violation rule. « Reply #1 on: April 17, 2022, 12:10:57 am ». When you look at the automatically generated floating firewall rules, you will find exactly the one you see. I think it has just been renamed from the older "Default deny". Logged. Intel Core i9-12900H, 2 x I226, 2x Intel 710, 16 GByte, 1 TByte NVME, ZTE F6005.I had ipv6 working pretty well on my consumer router but can't seem to figure how in opnsense.Note on IPv6: As of writing, CL still doesn't have native IPv6 widely deployed. Instead, they use 6rd gateways to provide IPv6 connectivity over IPv4. CL's 6rd gateways can perform poorly and cause decreased network performance and connectivity drops, so unless you specifically need to connect to IPv6-only hosts, I'd recommend that you disable IPv6 on …Re: Communication between two LANs. There are few ways you can do it. You will need static IPv4 or IPv6 address for the machine that you use to manage networks, preferably on the LAN network. On Type choose host, and on Value type IP address of the machine you want to allow.Dnsmasq DNS. Dnsmasq is a lightweight, easy to configure, DNS forwarder, which can be used to answer to dns queries from your network. Similar functionality is also provided by “Unbound DNS”, our standard enabled forward/resolver service. In some cases people prefer to use dnsmasq or combine it with our default enabled resolver (Unbound).Yes, see the first test "from Notebook", this is in one of the VLAN with /64 delegation, this works fine. The same from my Linux server in the other VLAN with /64 delegation, no problems. The problem with the IPv6 connection is only on the OPNSense itself. OPNSense Interface -> Overview -> WAN -> IPv6 address:Interesting. I'm half way between two ISPs at present, my old static provider and my new FTTP provider, who I have to use dhcp/dhcpv6 with. Now, I do have the option to request an IA on the WAN as well as a PD, and I notices after a reboot that the dhcpdv6 needed to be started, I put that down to just momentary madness.It appears your ISP is giving you an internal IP address for IPv4 WAN; you will want to uncheck the "Block private networks" box in the WAN interface, and then set the IPv6 to None. Edit: more information may need to be provided as your Gateway monitoring address is vastly different than the interface address shown.Is there a option to disable the automatic Gateway creation for the IPv6 Gateway?At the login prompt, enter the username installer and the password opnsense to continue with the installation. Press “Enter” to continue with the default keymap (if you are using the US keyboard, otherwise select the appropriate option) Select the “Install (ZFS)” option to use the ZFS filesystem.I changed the configuration from Aliases to Host (s) and this time it let me save the changes. From then on everything worked. Final configuration: Firewall - Settings - Advanced: - Reflection for port forwards: enabled. - Reflection for 1:1: enabled. - Automatic outbound NAT for Reflection: enabled. Firewall - Nat- Port Forward:OPNsense disable IPv6. If the open source firewall OPNsense is to be used exclusively with IPv4, it is recommended to deactivate IPv6. [1] To do this, perform the following steps (tested with OPNsense 19.7): In Interfaces ‣ [WAN]' set IPv6 Configuration Type to None and click Save . In Interfaces ‣ [LAN]' set IPv6 Configuration Type to None ...This will involve two steps - first creating a firewall rule on the WAN interface to allow clients to connect to the OPNsense WireGuard server, and then creating a firewall rule to allow access by the clients to whatever IPs they are intended to have access to. Go to Firewall ‣ Rules ‣ WAN. Click Add to add a new rule.Added: Toggle button to disable/enable multiple firewall rules #2505. Added: Port forward NAT rules with “any” protocol #4259. Added: Allow NPt to use dynamic IPv6 networks #4881. Added: Button to copy rules from one interface to another #8365. Fixed: Rule separator positions change when deleting multiple rules #9887IPv6 is too unstable. Had to disable it. Yesterday it worked, today it doesn't. And when it's enabled it takes much longer for OPNsense to startup and IPv6 just floods the logs. Shame since it worked fine on the PFsense box for quite a while. I see some issues in another thread too with IPv6. Think I will avoid IPv6 until it really becomes ...What works: DNS IPv4 resolution in the local network. Every host have (at least one) an ipv6 address. Hosts can use ipv6 locally: they can ping, ssh, whatever. Hosts can access the internet with ipv6: when going to google.com it resolves to the ipv6 address and it works. What doesn't work: Hosts accessing the local network with hostnames and ipv6.2 - Install AdGuardHome from System --> Firmware --> Plugins. 3 - Activate and start AdGuardHome from Services --> AdGuardHome. 4 - Opnsense - System - Settings -General. Untick: Do not use the local DNS service as a nameserver for this system. Untick: Allow DNS server list to be overridden by DHCP/PPP on WAN.All settings (specific to my router) are below. Modem was supplied by Spectrum. Navigate to Advanced Settings -> IPv6 and select these settings: IPv6 = ON. Internet Connection Type = Dynamic IP (SLAAC/DHCPv6) Expand the hidden Advanced tab. Get IPv6 Address = Auto. Prefix Delegation = Enable.23.1 (January 26, 2023) ¶. For more than 8 years now, OPNsense is driving innovation through modularising and hardening the open source firewall, with simple and reliable firmware upgrades, multi-language support, fast adoption of upstream software updates as well as clear and stable 2-Clause BSD licensing.Router Advertisements (Mode) The mode selection contains some predefined settings for radvd, which influence a set of configuration options and are intended for specific implementation scenarios. They define the type of client deployment used in your network. Router Only. Only advertise this router, clients are using static IPv6 addressses.As a disabled veteran, you may be eligible for home repair grants that can help you make necessary repairs to your home. These grants can help you improve the safety and accessibil...The Allow IPv6 option controls a set of block rules which prevent IPv6 traffic from being handled by the firewall. This option does not disable IPv6 functions or prevent it from being configured, it only controls traffic flow. When the option is enabled, IPv6 traffic will be allowed when permitted by firewall rules and/or automatic rules ... Now both IPv4 and IPv6 traffic is routed6 - In Opnsense disable Unbound. In case you want to use itClick Add DNS Server and repeat the prev
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Re: My OPNSense cant route IPv6. « Reply #1 on: March 13, 2021, 01:18:29 am ». 64 prefix means you are limited to 1 subnet = wan, so you can not setup ipv6 for your lan/dmz. "Interfaces -> Overview -> WAN -> IPv6 delegated prefix". If you have a prefix <=63 you have to setup router advertisement for SLAAC.I tried using these instructions for disabling IPv6 on Windows 2008 R2 but it did not disable the protocol for localhost. Pinging localhost or VPS-Web will still return ::1: instead of 127.0.0.1. I can use ping localhost -4 to get the correct address, but IPv6 takes precedence over IPv4 so the 3rd party software only gets the IPv6 address.After upgrading to 23.1.8, DNS resolution from various clients became slow (most likely running into various timeouts) up to completely unreliable. I noticed that on the Windows client, the IPv6 ULA of the OPNsense is handed out as DNS server to the clients, which is not the case with 23.1.7_3. On GNU/Linux I get the IPv4 and the IPv6 ULA of ...This manual explains how to set up OpenVPN on OPNsense devices. The IPv6 configuration explained here works only if your internet service provider offers IPv6 and your OPNsense is configured to use it. Skip the IPv6 configuration if you don't want to use it.If you wanted to disable IPv6 altogether, you could do so in OpnSense settings. Or block all IPv6 traffic. Disabling DHCPv6 only does not keep any client from using IPv6, since DHCPv6 is only one of three variants to get at an IPv6 - the other ones are static assignment (like with IPv4) and SLAAC.At the login prompt, enter the username installer and the password opnsense to continue with the installation. Press “Enter” to continue with the default keymap (if you are using the US keyboard, otherwise select the appropriate option) Select the “Install (ZFS)” option to use the ZFS filesystem.For many, many years, people believed that people with intellectual disability (ID) could not have mental illn For many, many years, people believed that people with intellectual d...Pick a /64 subnet from the delegation for your LAN and assign a fixed IP for the OPNsense LAN interface. Set up RADVD on OPNsense to advertise the route to the internet. You can also advertise the IPv6 address of your Pi-Hole for DNS. Services -> Router Advertisements -> LAN. Set it to unmanaged, high.Donating to disabled veterans is a noble and selfless act, but it can be difficult to know where to start. Before you pick up donations for disabled veterans, there are a few thing...In OPNsense high availability and failover is organised around carp, which makes it a logical choice to combine both technologies here as well. A couple of different strategies are supported to combine both technologies, ranging from disable the daemon when in carp mode to more fine grained control of how routes are propogated when a machine is ...It is required for ipv6. If you are concerned about using the dhcpv4, all clients, that I know of prioritize DNS received via DHCP (v4 or v6) over RDNSS (Router Advertisement). EDIT: The Alias should not break. 2. Reply. I've seen a bunch of guides on how to properly force IPv4 DNS requests through a specific DNS server, but they seemed to be ...My ISP (Cox) supports IPv6 and it cannot be disabled; I would like to extend the "goodness" of PiHole advert blocking to mobile devices that currently bypass ad-blocking by using IPv6 ; Whether I like …Re: IPv6 Configuration Type - LAN. As discussed elsewhere not too long ago dynamic address assignments always carry the risk of introducing intermittent connectivity issues due to the nature of the approach and complexity of the code and communication involved. Best practice: if you have a static assignment use it.Since IPv6 usually doesn't require any sort of NATing, i wouldn't be surprised if applications break when your host has a GUA from provider A and you're NPTing it to the prefix of provider B. I don't know if/how clients can be made aware of an existing NPT; Dynamic prefixes may not work at all, at least with OPNsense.The safest way is to have IPv6 disabled for something like 2 hours and then re-enable it with the settings that should work: 1. Disable IPv6 on the WAN interface and any LAN interfaces. 2. Disable "Block private networks" on WAN. 3. Optional: Manually implement FW rules to still block RFC1918 IPv4 addresses on the WAN interface. 4.Navigate to Firewall -> Rules -> LAN and delete the IPv6 rule. After that, click on the edit button next to IPv4. Scroll down and under Advanced features, select Gateway as NORDVPN_VPN4. Click Save. Next, click +Add, change Source to LAN net and Destination to LAN Address, don't change anything else, Save and Apply Changes.In Interfaces -> LAN , find IPv6 Configuration Type and set it to "Track Interface". Next, further down the same page, find the "Track IPv6 Interface" section (you might need to apply the above before this is visible). And Set IPv6 Interface to WAN. Apply.Throwing some things that I already have tried: - Disable IPv6 server side and client side (as far as I know). - Disable the checkboxes of "Block private networks" and "Block begun networks" on the WAN interface. - Add a rule to allow anything on any interface using a floating rule. - Some stupid things that don't make any sense.First, we have to head to System > Advanced > Networking. Then, we have to uncheck the “Allow IPv6” checkbox. Next, it is time to turn on Logging for PFsense Default Blocks. We can do this by heading to Rules under Firewalls. Now, click the icon to view the logs in the top right corner.My IPv6 configuration on the LAN interface is: - Track Interface (WAN) - Prefix ID 0. The result: - The LAN interface gets a public IPv6 Address and a link local address (fe80::1:1) - The WAN-pppoe interface gets a link local IPv6 address and a link local gateway from my ISP. - The LAN-clients get propper public IPv6 Addresses from the ...Block all IPv6 (1000000003) how to turn off logging of this item ? Locked post. New comments cannot be posted. ... Disable IPV6 upvotes ... Fresh OPNsense install, no access to Web GUI upvotes ...Click on "Create New Network" to create a VLAN. Enter the "Network Name" of "USER (20)" and the "VLAN ID" of 20, which is the same VLAN ID used for the OPNsense/switch VLAN configuration. Repeat this step with the other VLANs using the following values: Network Name. VLAN ID.If you connect from inside your LAN to the outside (WAN) IP-address of your firewall, you indeed will get the normal login page. If you check the same from outside - it won't work. Or should not - if you did not change anything. So - check from an outside address. LAN-client -> LAN-IP of firewall = works.In AdGuard Home navigate to Settings -> DNS settings and scroll down to Upstream DNS servers -> Private reverse DNS servers. Here we enter the Unbound server we changed earlier in OPNsense settings, 192.168.1.1:5353, or with other port pointing to you OPNsense instance if you have another one.Two reasons to disable it: Either your ISP doesn't provide it on your connection, or you don't use it on any of your hosts. For the first, not much damage leaving it on if your ISP isn't transporting IPv6 traffic to your port. For the Second, if you're not using it, you want to turn off or block IPv6 so that dangerous IPv6 traffic can't pass ...And same problem. In all cases from a LAN workstation: - we have an IPv6. - we ping the IPv6 LAN leg of OPNsense. - we ping the leg of LAN 2. - we ping the WAN leg of OPNsense. - but we do not ping the IPv6 of the Freebox or external sites. From the OPNsense, in the ping tests page: - we ping the WAN leg, the Freebox and the outside in IPv6 if ...OPNsense 16.1.8-amd64 FreeBSD 10.2-RELEASE-p14 OpenSSLHello, Yesterday, I updated OPNSense fro
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In addition, this aforementioned guide sets up AdGuardHome on the LAN for DNS. I am going to set up AdGuardHome DNS on both the IPV4 and IPV6 local hosts - which are the default interfaces for OPNsense UNBOUND. AdGuardHome works flawlessly with both OpenVPN and WireGuard protocols. No need for firewall rules or port forwarding with this set up.The Allow IPv6 option controls a set of block rules which prevent IPv6 traffic from being handled by the firewall. This option does not disable IPv6 functions or prevent it from being configured, it only controls traffic flow. When the option is enabled, IPv6 traffic will be allowed when permitted by firewall rules and/or automatic rules ...Disable hardware TCP segmentation offload, also checked by default, prevents the system to offload packet segmentation to the network card. This option is incompatible with IPS in OPNsense and is broken in some network cards. (the ifconfig settings in the OS related to this setting are tso, tso4, tso6)The only way I see working around the delusional-at-best attitude of OpenVPN here is to somehow instruct OPNsense to explicitly ignore and not create the IPv6 gateway for an OVPN client that does not explicitly request one. Otherwise, the user is going to get badly screwed from a POLA perspective as their VPN quits working or their …Nov 25, 2021 · Re: Prevent Ipv6 auto Gateway creation OpenVpn. When creating OpenVpn Client Connection, IPv4 and IPv6 Gateway is created. There should be the option as in PF-Sense to chose if just IPv4 or IPv6 or Both are created. And for now, even if the IPv6 Gateways are not want / needed they are present under Gateways, and cannot be deleted afterwards ...Re: IPv6 with Telekom not working after upgrade. Perhaps to add vital information: if you have WAN DHCPv6 and LAN tracking with a valid delegated prefix you don't need to do anything upgrading to 23.1 (other than doing the upgrade of course). PPPoEv6 is a side effect of the PPPoE connection and in the issue above it was used to connect the WAN ...As described in the Zerotier Manual, a local.conf can be created to enable or disable custom node-specific configuration overrides. Further details of permitted options can be found on the ZeroTier Manual. Please note that the local.conf must be a valid JSON document otherwise the service will fail to start.To configure your OPNsense firewall, you may perform the following task. Define an alias. Create a firewall rule. Select a firewall rule. Move a firewall rule. Delete a firewall rule. Enable/Disable a firewall rule. Edit a firewall rule. Clone a firewall rule. Enable/Disable logging for a firewall rule. 1. The Use of Aliases in pf Firewall RulesI create my OpenVPN Clients with Disable IPv6 checked. Should the IPv6 gateway be automatically created in this case? I disable the _VPNV6 gateways and my OpenVPN Client appears to work correctly. This is largely an FYI item for those designing the proper OPNsense actions to router configuration events.I've been using OPNsense for a couple of years now and have always been working with IPV4. Recently my ISP also allowed my home to have IPV6 enabled, but I can't get it to work out. From the email I've gotten from my ISP they only said to configure the Prefix delegation size to 56, and to have it as DHCPv6.OPNSense IPv6 DNS with Active Directory. Hi All, just being playing OPNsense and real noob with IPv6. So I have a router getting IPv6 from my ISP which is working all fine. However, I don't know how to setup Routing advertising so I can point DNS to my Active Directory Server. Also IPv6 on the Domain Controllers should i make it static to the ...The Fair Housing Act protects adults with disabilities from discrimination by mortgage lenders, and this is an important way to ensure that people of all ability levels can enjoy e...I finally decided to reboot opnsense, and than ipv6 worked again. The removed device got its ipv6 ip back (although not added as static anymore) and received the same ipv6 ip as before.I need to find a way to prevent opnsense from assigning that autoconf EUI64 address on the WAN IF or else all IPv6 traffic originating from the firewall itself fails. By default the router is using 2604:5500:30c8:0:ae1f:6bff:fe83:22f7 instead of the DHCPv6 assigned address 2604:5500:30c8::662; all my LAN clients do get an IPv6 address via ...Re: 23.7.8 - IPV6 issues with WG / DHCPv6 / Gateways / RADVD. opnsense-patch a40dd50aec6 fixed the issue, so looks like it reversed the commit and I was able to start all services and everything is working as normal. The site where its running doesnt have GUAs, so its running ULAs with VTI, frr didnt have an issue and was still sending BGP ...In order to access OPNsense via SSH, SSH access will need to be configured via System ‣ Settings ‣ Administration . Under the "Secure Shell" heading, the following options are available: Secure Shell Server. Enable a secure shell service. Login Group. Select the allowed groups for remote login.If you are a veteran, one of the greatest available benefits is access to a low-cost education post-service. Much of this greater access is possible through scholarships specifical...On June 22, 2021, just a few weeks before the city’s Summer Paralympic Games were slated to begin, Tokyo’s Dawn Avatar Robot Cafe officially opened its doors for business. What hel...Disable TLS session tickets - increases privacy but also latency. Fallback Resolver. This is a normal, non-encrypted DNS resolver, that will be only used for one-shot queries when retrieving the initial resolvers list, and only if the system DNS configuration does not work. Block IPv6. Immediately respond to IPv6-related queries with an empty ...OPNsense 22.7 released. July 28, 2022. Hi there, For more than 7 and a half years now, OPNsense is driving innovation through. modularising and hardening the open source firewall, with simple. and reliable firmware upgrades, multi-language support, fast adoption. of upstream software updates as well as clear and stable 2-Clause BSD.At the login prompt, enter the username installer and the password opnsense to continue with the installation. Press "Enter" to continue with the default keymap (if you are using the US keyboard, otherwise select the appropriate option) Select the "Install (ZFS)" option to use the ZFS filesystem.I have found it reasonably straightforward including IPv6 and I have followed the upgrades within some days of release since installing. Currently 19.7.2 on HP T610, Intel PRO/1000 quad NIC. The last few days when I have come to send large mails through Claws-Mail I am seeing Default deny rule messages between my desktop and my ISP's server.Re: Windows 10 still see IPv6 even though IPv6 is disabled on this VLAN. Make sure the Ethernet port the Windows system is plugged into is not set to receive ANY other VLANs tagged. Ports plugged into VLAN unaware systems/devices SHOULD NOT be set to tag any additional VLANs, they should ONLY have the "native" VLAN untagged.For outgoing IPv6 access, you can usually allow any -> any, so the only question is incoming IPv6 traffic. When I do that, the devices on the guest-like VLAN will be able to reach the devices on the LAN VLAN without restriction. That entirely defeats the idea of allowing only what I want to allow. Quote.To make a long story short: IPv6 IPsec connections cannot be established. A packet capture shows that the OPNsense responds to incoming ISAKMP traffic. However, response packets never reach the IPsec originator. It looks like the IPv6 gateway drops the packets for whatever reason. Further research in the forum put me on the right track.Without Prefix Delegation, track interface requires a point-to-point WAN interface with SLAAC. If your modem supports this (some do), you can "pass through" the WAN-side /64 to a single LAN. Otherwise, you would indeed need to bind multiple IPv6 addresses to the WAN interface in order to make them available to hosts in the LAN.Let's Encrypt supports IPv6 both for accessing the ACME API using an ACME client, and for the DNS lookups and HTTP requests we make when validating your control of domain names.Disable IPv6 on each interface. Navigate to Interfaces to see a list of the interfaces on your firewall (the list under Assignments and Switches.) Start with the WAN interface. Yes, normally you do, probably without thinkin