OPNsense Forum

Archive => 21.1 Legacy Series => Topic started by: norgan on March 24, 2021, 03:27:10 am

Title: [BUG]IPV6 Link monitor can't ping
Post by: norgan on March 24, 2021, 03:27:10 am
I have a dual stack link and today I had no internet because the ipv6 wan interface had no IP address. I'm not able to properly evaluate it's state so the gateway group doesn't work.
Id like to have a ping working so i can monitor the link and flick back to ipv4 if ipv6 isn't working.


root@router:~ # ping 2401:d002:2302:b00:9ae7:f4ff:fe67:e871
ping: cannot resolve 2401:d002:2302:b00:9ae7:f4ff:fe67:e871: Host name lookup failure
root@router:~ # ping 2620:fe::fe
ping: cannot resolve 2620:fe::fe: Host name lookup failure
root@router:~ # ping6 2620:fe::fe
ping6: UDP connect: No route to host
root@router:~ #


Update: As I have come to understand, it seems the addition of an ipv6 gateway into a gateway group causes some ipv6 strangeness. I have taken the ipv6 gateway out of the group and things have settled.
Title: Re: IPV6 Link monitor can't ping
Post by: norgan on March 24, 2021, 04:06:30 am
Now that is strange, I can ping google and my next hop on the router.
2401:d002:2302:b00:9ae7:f4ff:fe67:e871

But can't ping the quad9 ipv6 dns servers.
2620:fe::fe
2620:fe::9

Perhaps they are filtering ICMP. Could someone with working ipv6 please ping one of the above and let me know if you get a response.
Title: Re: IPV6 Link monitor can't ping
Post by: norgan on March 24, 2021, 04:13:32 am
And now i can't even ping that lol I think my provider is having ipv6 issues as well but those quad9 servers don't seem to ping. I like using quad9 as a link monitor because that's my DNS forwarder target.