Switch between ubuntu and centos firewall

Ubuntu and centos firewall switch ubuntu: ufwdisable off ufwenable enable ufwallowsmtp allow external access 25 TCP (smtp) Port ufwallow22tcp allow access 22 TCP (ssh) Port ufwallowfrom17272103221 allow 22 ubuntu and centos firewall switch ubuntu: ufw disable off ufw enable ufw allow smtp allow external access 25/tcp (smtp) Port ufw allow 22/tcp allow access 22/tcp (ssh) port ufw allow from 172.72.103.221 allows 221 to access centosservice iptables stop/start/restart on, off, and restart chkconfig iptables on/off start/off