How to add an IP to access the plesk panel and ssh

Open flle /etc/sysconfig/iptables:

# nano /etc/sysconfig/iptables
-A INPUT -s 72.177.xxx.xxx/32 -p tcp -m tcp --dport 8443 -j ACCEPT
-A INPUT -s 66.226.xx.xx/32 -p tcp -m tcp --dport 10222 -j ACCEPT

Save and restart iptables

service iptables restart