Hi all,
I'm having this intermittent issue from time to time and for the life of me cannot sort it out. I'm using WireGuard tunnel on a Ubuntu 22.04 LTS machine with a custom script. This script refreshes the keys daily (via API): it deletes old interface key, then interface, then creates new interface with the new keys. So far so good, this setup has been working reliably for some years.
Starting roughly from the summer of last year I've started having the issue.
Sometimes (usually once per week, but it can happen multiple times per day) tunnel hangs. Like, there's no packets flowing, anything, pings just timeout (no destination unreachable stuff, just black hole). Restarting the same tunnel with wg-quick doesn't help as well, I have to refresh the keys via script again and then it works. Like a key gets banned for some reason? I'm also not visiting anything which can put me on the list, and also if this was the case I would expect Mullvad to block my account, not a single key.
It's certainly not a key limitation, because it's a dedicated account and I can see that script removes a key which was in use, so there's no overflow (when I log in to the account it always has 1/5 keys).
Have anyone also experience it?