I've broken something in my networking, but I don't know what.

[rorywohl]

For the last couple of days, no matter what script I try to run, I get errors similar to the following:

✔️ Started LXC Container ⠴ Customizing LXC ContainerW: Failed to fetch http://deb.debian.org/debian/dists/bookworm/InRelease Temporary failure resolving 'deb.debian.org' W: Failed to fetch http://deb.debian.org/debian/dists/bookworm-updates/InRelease Cannot initiate the connection to debian.map.fastlydns.net:80 (2a04:4e42::644). - connect (101: Network is unreachable) Cannot initiate the connection to debian.map.fastlydns.net:80 (2a04:4e42:200::644). - connect (101: Network is unreachable) Cannot initiate the connection to debian.map.fastlydns.net:80 (2a04:4e42:400::644). - connect (101: Network is unreachable) Cannot initiate the connection to debian.map.fastlydns.net:80 (2a04:4e42:600::644). - connect (101: Network is unreachable) Could not connect to debian.map.fastlydns.net:80 (151.101.2.132). - connect (113: No route to host) Could not connect to debian.map.fastlydns.net:80 (151.101.66.132). - connect (113: No route to host) Could not connect to debian.map.fastlydns.net:80 (151.101.130.132). - connect (113: No route to host) Could not connect to debian.map.fastlydns.net:80 (151.101.194.132). - connect (113: No route to host) Cannot initiate the connection to deb.debian.org:80 (2a04:4e42:400::644). - connect (101: Network is unreachable) Cannot initiate the connection to deb.debian.org:80 (2a04:4e42:200::644). - connect (101: Network is unreachable) Cannot initiate the connection to deb.debian.org:80 (2a04:4e42::644). - connect (101: Network is unreachable) Cannot initiate the connection to deb.debian.org:80 (2a04:4e42:600::644). - connect (101: Network is unreachable) W: Failed to fetch http://security.debian.org/dists/bookworm-security/InRelease Temporary failure resolving 'security.debian.org' W: Some index files failed to download. They have been ignored, or old ones used instead. ⠸ Customizing LXC ContainerE: Failed to fetch http://deb.debian.org/debian/pool/main/c/curl/libcurl4_7.88.1-10%2bdeb12u7_amd64.deb 404 Not Found [IP: 151.101.130.132 80] E: Failed to fetch http://deb.debian.org/debian/pool/main/c/curl/curl_7.88.1-10%2bdeb12u7_amd64.deb 404 Not Found [IP: 151.101.130.132 80] E: Failed to fetch http://deb.debian.org/debian/pool/main/g/glib2.0/libglib2.0-0_2.74.6-2%2bdeb12u3_amd64.deb 404 Not Found [IP: 151.101.130.132 80] E: Failed to fetch http://deb.debian.org/debian/pool/main/g/glib2.0/libglib2.0-data_2.74.6-2%2bdeb12u3_all.deb 404 Not Found [IP: 151.101.130.132 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? ⠧ Customizing LXC Container [ERROR] in line 1245: exit code 0: while executing command pct exec "$CTID" -- bash -c "apt-get update >/dev/null && apt-get install -y sudo curl mc gnupg2 >/dev/null"

If I open a shell on the "half-baked" LXC, I initially can't resolve hostnames, ping hosts, etc., but if I wait a couple of minutes, then DNS resolution starts to work. But, by then, the script has timed out.

Does anyone have any suggestions on where I can look to try and figure this out?

Thank you!

[MickLesk]

1. try to disable ipv6

2. check network inside:
   cat /etc/resolv.conf
   ping -c1 deb.debian.org
   getent hosts deb.debian.org

3. PiHole / Adblock? Disable for Testing

4. try temporary dns in lxc / container:
   echo "nameserver 1.1.1.1" > /etc/resolv.conf

[rorywohl]

OK, well, this morning, everything works fine. The only thing I changed when running a script was to specify 1.1.1.1 as the dns server when prompted by the host.

But, I don't think that's what made the difference as it looks like the container used the dns servers specified by dhcp:

root@nocodb:~# cat /etc/resolv.conf
domain ardeidae.internal
search ardeidae.internal
nameserver 192.168.232.25
nameserver 1.1.1.1
nameserver 1.0.0.1

Anyway, all good now. Thanks for your suggestions, I will try them if it happens again.

(I believe the act of posting a problem causes the universe to take notice & fix it 😉 )