c30-31ł̐ݒ
   # echo 1 > /proc/sys/net/ipv4/ip_forward
   # /sbin/iptables -t nat -A PREROUTING -p tcp -i eth1 -d 125.6.177.79 --dport 80 -j DNAT --to-destination 10.254.0.121-10.254.0.122
   # /sbin/iptables -A FORWARD -i eth1 -o eth0 -p tcp -d 10.254.0.121 --dport 80 -j ACCEPT
   # /sbin/iptables -A FORWARD -i eth1 -o eth0 -p tcp -d 10.254.0.122 --dport 80 -j ACCEPT
   # /etc/init.d/httpd stop
   # /etc/init.d/iptables save
   # cat /etc/sysconfig/iptables
   # chkconfig iptables on
   # chkconfig httpd off
   # vi /etc/sysctl.conf   #ipforwardݒ1ɕύX

c30-27,c30-25ł̐ݒ
  # route delete default
  # route add default gw 10.254.0.125 eth0
  # vi /etc/sysconfig/netwrok #default routȅ
