ls -l /etc/rc.local
-rwxr-xr-x 1 root root 843 2012-09-27 17:02 /etc/rc.local

/etc/rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

#Flush of all rules
iptables -F
#permit SSH access
iptables  -A INPUT -p tcp --dport 22 -j ACCEPT
#Permit local traffic
iptables  -A INPUT -p tcp -s 127.0.0.1/8 -j ACCEPT
iptables  -A INPUT -p tcp -s 192.168.0.98 -j ACCEPT
#Permit access from you workstation
iptables  -A INPUT -p tcp -s 192.168.0.98 -j ACCEPT
#Block all Zimbra ports for incoming traffic
iptables -A INPUT -i eth0 -p tcp -m multiport --dport 25,80,110,143,443,993,995 -j REJECT
#Block all Zimbra outgoing traffic
iptables -A OUTPUT -o eth0 -p tcp --dport 25 -j REJECT

exit 0