Iptables for zimbra
SMTP
iptables -I INPUT -p tcp --dport 25 -j ACCEPT
HTTP
iptables -I INPUT -p tcp --dport 80 -j ACCEPT
POP3
iptables -I INPUT -p tcp --dport 110 -j ACCEPT
IMAP
iptables -I INPUT -p tcp --dport 143 -j ACCEPT
LDAP
iptables -I INPUT -p tcp --dport 389 -j ACCEPT
HTTPS
iptables -I INPUT -p tcp --dport 443 -j ACCEPT
SMTPS
iptables -I INPUT -p tcp --dport 465 -j ACCEPT
IMAPS
iptables -I INPUT -p tcp --dport 993 -j ACCEPT
POP3S
iptables -I INPUT -p tcp --dport 995 -j ACCEPT
VMSVC
iptables -I INPUT -p tcp --dport 7025 -j ACCEPT
Port for ZCS Web Administration
iptables -I INPUT -p tcp --dport 7071 -j ACCEPT
To save and restart Iptables
/etc/init.d/iptables save
/etc/init.d/iptables restart
Thanks for reading Zimbra open source iptables memo My blog Zimbra Mail Server,linux,bash script,centos,linux command I hope this is useful.