I have a CentOS 7 server using restic to backup data to a B2 (Backblaze) server. B2 uses port 443 for it’s connection.
When I run restic with no firewall, it works great and backs up to B2 just fine. However, when I enable the firewall with port 443 open, it just hangs and never even connects to B2.
lsof -i -P -n
and it shows:
restic 53047 root 3u IPv4 122320698 0t0 TCP xx.x.x.xx:40084->18.104.22.168:443 (ESTABLISHED)
My firewall is on the WAN Incoming and even though port 443 is open, it will not make a connection. Does anyone know what other ports need to be open for this to set up to function correctly?