VPN connection stopped working. What's wrong?

Question

openvpn

I set it up according to this instruction:
https://www.digitalocean.com/community/tutorials/o...
Until recently, everything worked.
Now it seems to connect, but curl cannot see a single site (it just hangs stupidly)
Where to look for a problem? What logs to poke around? Tell me please.

Answer 1

POSTROUTING rule crashed on the server