Can't get telekom ipv6 to work on LAN side

[NovyLevi]

Hey everyone!

Total newbie at OPNSense, and I've been trying to set up ipv6 for the last couple of days without success. I have followed all the tutorials and troubleshooting guides I could find online. I believe I have tried all the possible combinations of settings, but none of them has worked. Currently using track interface, with manual settings disabled. I have also added multiple firewall rules to allow icmpv6 packages with no help.

The only error(s) I see is on the attached image: /interfaces.php: dhcpd_radvd_configure(auto) found no suitable IPv6 address on ix0 (ix0 is LAN)

WAN side has an ipv6 address, and can ping ipv6 hosts. But no matter what settings I use I can't get it to work on the LAN side (I haven't tried setting static ipv6 addresses as my ISP provides me with a dynamic address.) Ipv4 is working perfectly.

Could you please help me resolve this issue?
Thanks in advance!

[Maurice]

ISP_Modem_Info.png doesn't show a modem, but a router. So you're running OPNsense behind another router. This only works if the other router supports downstream prefix delegation, which most cheap routers provided by ISPs don't.

Solution: Switch that Telekom router to bridge mode / modem mode or replace it with an actual modem.

Cheers
Maurice

[NovyLevi]

Thank you, I will ask Telekom for my PPPoE login information, and try to set it up this way.

I will report back as soon as progress is made :)

[beisser]

i can tell you that telekom pppoe works just fine with opnsense. i have it running behind a fritzbox (running as modem).
it will not work with a speedport router because those cant be configured for pppoe passthrough.
so if you have a fritzbox and get stuck with it ping me and we can work this out.

[NovyLevi]

Hey!

Thank you so much for helping me. It works flawlessly via pppoe!

P.S.: It wasn't the solution I was originally looking for, as DHCPv6 works behind the ISP router at another place where I have Telekom, and I though it would work here also. But obviously it depends on the modem provided.


Thank you again for being so patient and helpful!
Keep up the positivity!