So I got a backupsy server to backup my data. When i setup a password-less ssh login from the backupsy server to the main server using this command sudo ssh-copy-id -i /root/.ssh/id_rsa.pub firstname.lastname@example.org Somehow I messed up the step where I enter the password for the main server. As a result, I can no loger ping the main server from backupsy and I can't ping the backupsy IP from the main server. It looks like they both block each other IP. I search on the main server for the IP of the backupsy but nothing comes up csf -g xxx.ip.of.backupsy grep xxx.ip.of.backupsy /var/log/lfd.log @eva2000 Any idea where else can i check?