#!/bin/sh
#
# SMTP and POP3
#

source /filter/fw.conf
echo "$0"

ARG=$1
if [ ${1:-none} = "none" ]; then
    ARG="refresh"
    ipchains -F mail
else
    if [ $ARG != "refresh" -a $ARG != "purge" -a $ARG != "delete" ]; then
        echo
        echo "Usage:   $0 <refresh|purge|delete>"
        echo "Example: $0 refresh    (default)"
        echo
        exit
    fi
fi
case $ARG in ( refresh ) ACTION="-A"; ipchains -F mail;;
             ( purge )   ACTION="-D";;
             ( delete )  ACTION="-D"; ipchains -F mail; exit;;
esac

###------- Edit Rules Below -------###

# FORWARD input in
ipchains $ACTION mail -p TCP -i $IF_IP -s $NET_ALL $HI -d $ZEUS smtp -j ACCEPT
ipchains $ACTION mail -p TCP -i $IF_IP ! -y -s $NET_ALL smtp -d $NET_IP2 $HI -j ACCEPT

ipchains $ACTION mail -p TCP -i $IF_IP ! -y -s $NET_ALL pop2 -d $NET_IP2 $HI -j ACCEPT
ipchains $ACTION mail -p TCP -i $IF_IP ! -y -s $NET_ALL pop3 -d $NET_IP2 $HI -j ACCEPT
ipchains $ACTION mail -p TCP -i $IF_IP ! -y -s $NET_ALL imap2 -d $NET_IP2 $HI -j ACCEPT
ipchains $ACTION mail -p TCP -i $IF_IP ! -y -s $NET_ALL 106 -d $NET_IP2 $HI -j ACCEPT

# send port unreachable icmp messages to auth requests to avoid timeouts
ipchains $ACTION mail -p TCP -i $IF_IP -s $NET_ALL $HI -d $NET_IP2 $AUTH -j REJECT