Configuration of the “/etc/rc.d/init.d/firewall” script file for the Mail Server

echo -n “Starting Firewalling Services:”
# Some definitions for easy maintenance.
# EDIT THESE TO SUIT YOUR SYSTEM AND ISP.

EXTERNAL_INTERFACE=”ethO”
LOOPBACK_INTERFACE=”lo”
IPADDR=”my.ip.address”
ANYWHERE=”any/O”
NAMESERVER_1=”my.name.server.1″
NAMESERVER_2=”my.name.server.2″
MY_ISP=”my.isp.address.range/24″
SMTP_SERVER=”my.smtp.server”
SYSLOG_SERVER=”syslog.internal.server”
SYSLOG_CLIENT=”sys.int.client.range/24″
LOOPBACK=”127.0.0.0/8″
CLASS_A=”10.0.0.0/8″
CLASS_B=”172.16.0.0/12″
CLASS_C=”192.168.0.0/16″
CLASS_D_MULTICAST=”224.0.0.0/4″
CLASS_E_RESERVED_NET=”240.0.0.0/5″
BROADCAST_SRC=”0.0.0.0″
BROADCAST_DEST=”255.255.255.255″
PRIVPORTS=”0:1023″
UNPRIVPORTS=”1024:65535″

# Internet connected interface
# Your local naming convention
# Your IP address
# Match any IP address
# Everyone must have at least one
# Your secondary name server
# ISP & NOC address range
# Your Mail Hub Server.
# Your syslog internal server
# Your syslog internal client range
# Reserved loopback address range
# Class A private networks
# Class B private networks
# Class C private networks
# Class D multicast addresses
# Class E reserved addresses
# Broadcast source address
# Broadcast destination address
# Well known, privileged port range
# Unprivileged port range

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