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Proxmox host stops responding, LXC continues (infosec.pub)
submitted 10 months ago by ProfessorHoover@infosec.pub to c/proxmox@lemmy.world
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I'm running Proxmox 9 on a server with currently a single LXC running. On no apparent time schedule, within a day but frequently within an hour, the host will stop responding to SSH, pings and the web UI stops updating. However, the LXC continues to run happily. The only way to bring the host back up is to power cycle the server.

Has anyone got any troubleshooting tips?

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[-] ProfessorHoover@infosec.pub 2 points 10 months ago

Thanks, I'll try that. Something odd is also happening where I just realised I can access it by tailscale, but not the local network so that narrows it down a bit, but I'll give the spare drive a go first.

[-] spitfire@lemmy.world 1 points 10 months ago

Hmm, are you running Tailscale on the Proxmox VE, not in a container/VM?

[-] ProfessorHoover@infosec.pub 1 points 9 months ago

I'm running it on both the host and the container

[-] spitfire@lemmy.world 1 points 9 months ago

There you go :) I’ve had a Pi running Tailscale and it ws not reachable using its local IP (it was accessible when using Tailscale IP) when Tailscale was started. When I was using Tailscale for site-to-site connectivity (subnet router) I ran it in an LXC container on PVE, so I’d advise you try that. Avoiding installation of additional software on the hypervisor seems like a smart idea - whenever I can I put stuff in containers/VMs.

this post was submitted on 06 Nov 2025
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Proxmox VE is a complete, open-source server management platform for enterprise virtualization. It tightly integrates the KVM hypervisor and Linux Containers (LXC), software-defined storage and networking functionality, on a single platform. With the integrated web-based user interface you can manage VMs and containers, high availability for clusters, or the integrated disaster recovery tools with ease.

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