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@Agricolovo

I am still looking to configure DS-Lite via GUI for my German cable provider but no luck.

For now I have created a script which runs on opnsense start and it works fine.

to test it - connect via ssh to opnsense, enter shell and enter following commands:

ifconfig gif0 create

ifconfig gif0 inet6 tunnel <<LOCAL IPv6 ADDRESS>> <<AFTR ADDRESS>> mtu 1460 -accept_rtadv ifdisabled

ifconfig gif0 inet 192.0.0.2 192.0.0.1 netmask 255.255.255.248

route add default -interface gif0

Hi guys,
So I have recently changed my ISP Provider (German Cable network - O2) and I having some difficulties with configuring my own router.

Modem I am using is Docsis3.1 Cable Modem Technicolor TC4400-EU. My desktop can reach only IPv6 addresses/websites while being connected directly to modem (DHCP enabled). So it means that there is only DualStack-Lite provided.

As I am not so IPv6 oriented - I have trouble with configuring it.

Followed short config manual found on wiki.cable-wiki.xyz but it seems not to be working, even the router cannot reach IPv6 addresses (for example google v6 dns).

What I've tried is:
1.

Code Select Expand

Interfaces - WAN
IPv4 Configuration Type - DHCP
IPv6 Configuration Type - DHCPv6
Prefix Delegation size - 64/59/56
with and without "Use IPv4 connectivity" option enabled

2.

Code Select Expand

Interfaces - WAN
IPv4 Configuration Type - None
IPv6 Configuration Type - Static

IPv6 Address - copied "IPv6 Address" from "ipconfig /all" while modem was connected directly to the PC
IPv6 Upstream Gateway
  Gateway IPv6 - copied "Default Gateway" from "ipconfig /all" while modem was connected directly to the PC

Tried with and without "Use IPv4 connectivity" option enabled

Code Select Expand

Interfaces->Diagnostics->Ping
Host 2001:4860:4860::8888
IP Protocol IPv6

and still 100% packet loss.

What I am missing?