Arch Linux

Lone_Gunman

Member

Registered: 2010-02-17

Posts: 18

ISP changed to IPv6, home server unreachable

Hello all,

I'm asking for help as I'm running an Archlinux home server with Nextcloud, SSH, Plex, which became unreachable since my ISP switched me from IPv4 to IPv6 without warning.

At this time I can access my services from "inside" my home LAN, just replacing my former IPv4 to its new IPv6.,
but as soon as I'm on an external network it doesn't work anymore :

- I can ping my server IPv6
- I cannot access my NextCloud nor SSH my server

[olivier@laptop ~]$ ssh -vvv olivier@xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx
OpenSSH_8.9p1, OpenSSL 1.1.1m  14 Dec 2021
debug1: Reading configuration data /home/olivier/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: resolve_canonicalize: hostname xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx is address
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts' -> '/home/olivier/.ssh/known_hosts'
debug3: expanded UserKnownHostsFile '~/.ssh/known_hosts2' -> '/home/olivier/.ssh/known_hosts2'
debug3: ssh_connect_direct: entering
debug1: Connecting to xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx [xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx] port 22.
debug3: set_sock_tos: set socket 3 IPV6_TCLASS 0x48

Then it times out

Thanks for your help !

progandy

Member

Registered: 2012-05-17

Posts: 5,279

Re: ISP changed to IPv6, home server unreachable

Does your firewall/router allow incoming IPv6 traffic for the server ip and the desired ports?

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Lone_Gunman

Member

Registered: 2010-02-17

Posts: 18

Re: ISP changed to IPv6, home server unreachable

Actually my router is just my ISP's box and previously offered NAT functions when I was in IPv4, but now that feature has gone from its interface since it went IPv6.

So I don't know about routing, I just know I can ping my server from an outside network.
Is there another way I could check if the routing is effective ?

Lone_Gunman

Member

Registered: 2010-02-17

Posts: 18

Re: ISP changed to IPv6, home server unreachable

Ok I'm sorry, I just found a new Firewall configuration tab in my ISP box...

Set it up and now it's working, thanks for your help, can be market as SOLVED.

Slithery

Administrator

From: Norfolk, UK

Registered: 2013-12-01

Posts: 5,776

Re: ISP changed to IPv6, home server unreachable

...can be market as SOLVED.

That's your responsibility.
CoC - How to post

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No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

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