TL;DR When defining networking on Proxmox 4 LXC containers, use an appropriate CIDR suffix (e.g. 24) - don’t use 32! On my Proxmox 4 server I’m running a whole load of lovely LXC containers. Unfortunately, I had trouble connecting to them. From a client machine, I got the error ssh_exchange_identification: read: Connection reset by peer On the server I was connecting to (which I could get a console for through the Proxmox GUI, or a session on using pct enter from the Proxmox host) I ran a SSHD process with debug to see what was happening:

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I’ve got an EdgeRouter LITE (ERL) which I used as my home router until a powercut fried it a while ago (looks like I’m not the only one to have this issue). The symptoms were it powering on but not giving any DHCP addresses, or after a factory reset responding on the default IP of 192.168.1.1. It was a real shame, because it had been a great bit of kit up until then.

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