Auto Sync keeps failing

I am trying to add sites to my hub using auto sync and it keeps failing. Chat support gave me ip addresses to have my host add to firewall, but it's still not working. My server support said they didn't see any blocked attempts of those IP addresses and asked what ports the process uses so he could check that. Any ideas? I got disconnected with Chat support so someone (I think Violeta?) is already looking into the issue. Thanks