#!/bin/sh EXTIF=192.168.0.7 INTIF=10.0.0.1 CLIENT=10.0.0.2 echo "setting up network..." ifconfig lo 127.0.0.1 ifconfig eth0 $EXTIF txqueuelen 1000 ifconfig eth1 $INTIF txqueuelen 1000 echo "0" > /proc/sys/net/ipv4/tcp_timestamps echo "0" > /proc/sys/net/ipv4/tcp_sack echo "1" > /proc/sys/net/ipv4/tcp_vegas_cong_avoid echo "262144" > /proc/sys/net/ipv4/ip_conntrack_max echo "5000000 5000000 5000000" > /proc/sys/net/ipv4/tcp_rmem echo "5000000 5000000 5000000" > /proc/sys/net/ipv4/tcp_wmem echo "5000000 5000000 5000000" > /proc/sys/net/ipv4/tcp_mem echo "262143" > /proc/sys/net/core/rmem_max echo "262143" > /proc/sys/net/core/wmem_max echo "262143" > /proc/sys/net/core/rmem_default echo "262143" > /proc/sys/net/core/wmem_default echo "262143" > /proc/sys/net/core/optmem_max echo "100000" > /proc/sys/net/core/netdev_max_backlog echo "1" > /proc/sys/net/ipv4/ip_forward echo "262144" > /proc/sys/net/ipv4/ip_conntrack_max echo "waiting for netserver..." /usr/bin/netcat -c -l -p 8000 echo "setting up iptables..." IPTABLES=/sbin/iptables EXTIF=eth0 INTIF=eth1 $IPTABLES -P INPUT ACCEPT $IPTABLES -F INPUT $IPTABLES -P OUTPUT ACCEPT $IPTABLES -F OUTPUT $IPTABLES -P FORWARD DROP $IPTABLES -F FORWARD $IPTABLES -t nat -F $IPTABLES -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -i $INTIF -o $EXTIF -j ACCEPT $IPTABLES -A FORWARD -j LOG $IPTABLES -t nat -A POSTROUTING -o $EXTIF -j MASQUERADE echo "informing client..." sleep 5 echo "server ready" | /usr/bin/netcat -c $CLIENT 8000 echo "starting bash..." exec /bin/bash