This is an automated archive made by the Lemmit Bot.
The original was posted on /r/selfhosted by /u/StudentWithNoMaster on 2025-02-02 08:13:41+00:00.
Story time:
So last night, I realized that my Nextcloud was unable to connect to internet for 'app updates'. I was surprised because my internet was working.
My setup is basically a Pihole for DNS resolver on a Pi Zero 2W and Proxmox server with LXCs and docker containers. I use custom DNS entries to have local access with traefik and Pihole.
So I started with testing, Proxmox was reaching the Internet, but that ONE LXC was not. So I rebooted the LXC and then the system. Now, even proxmox was not connecting to the internet. Internally everything was working, just the DNS issue. So I changed the DNS to cloudflare for Proxmox and it worked. Then moved on to test Pihole, it was fine. Then tried to ping Pi from Proxmox, it just wont! Then tried to ping Proxmox from Pi, it worked! And funnily, now Proxmox has internet, but not the LXC. Then I pinged the LXC from Pi, and now the LXC has internet and everything is fine.
Just to be sure, I rebooted the entire proxmox once again. Now the entire proxmox won't work.
So after alot of back and forth, I rebooted my ROUTER. And now everybody is happy. All issues solved...
It took four hours to realize that it was a 2 min issue.