답변주셔서 감사합니다..
허나 아래처럼 에러가 나버리는군요
이거참.. 그리고 /etc/sysconfig/network와 ifcfg-eth0 lo0 에는 GATEWAY=210.105.173.254 입력되어있습니다.
 route add -net 218.146.248.162 netmask 255.255.255.0 gateway 210.105.173.254
route: netmask doesn't match route address
  #route 내용#
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
218.146.248.0 * 255.255.255.0 U 0 0 0 eth0
127.0.0.0 * 255.0.0.0 U 0 0 0 lo
 #netstats -nr
Destination Gateway Genmask Flags MSS Window irtt Iface
218.146.248.0 0.0.0.0 255.255.255.0 U 40 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 40 0 0 lo