아이피 별로 route Gateway 분기하기

route del default
route add default gw 172.20.10.1
route add 130.80.10.185 gw 192.168.0.1
route add 130.68.49.35 gw 192.168.0.1

root@debian:~# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 192.168.43.1 0.0.0.0 UG 0 0 0 wlan0
130.80.10.185 192.168.nate.co 255.255.255.255 UGH 0 0 0 eth0
link-local * 255.255.0.0 U 1000 0 0 wlan0
192.168.0.0 * 255.255.255.0 U 0 0 0 eth0
192.168.43.0 * 255.255.255.0 U 0 0 0 wlan0

 

——————————————————————————–
U : 활성화중
G : 게이트웨이 설정중
H : 호스트 대상
——————————————————————————–
# 130.68.41.0 네트워크 영역에 대해서 패킷이 나가는 GW를 192.168.0.1로 지정한다는 의미

sudo route add -net 130.68.41.0 netmask 255.255.255.0 gw 192.168.0.1

user1@webterror:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.20.10.1 0.0.0.0 UG 0 0 0 wlan0
130.68.41.0 192.168.0.1 255.255.255.0 UG 0 0 0 eth0
130.80.10.185 192.168.0.1 255.255.255.255 UGH 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0
172.20.10.0 0.0.0.0 255.255.255.240 U 2 0 0 wlan0
192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth0

ip 명령어로 라우터 테이블 관리하기

root@debian:~# netstat -anr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 wlan0

echo "1 admin" >> /etc/iproute2/rt_tables 
ip route add 192.168.0.0/24 dev eth0 src 192.168.0.44 table admin
ip route list table admin

root@debian:~# ifconfig
eth0 Link encap:Ethernet HWaddr 60:eb:69:88:6d:e5 
inet addr:192.168.0.44 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::62eb:69ff:fe88:6de5/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:178704 errors:0 dropped:493 overruns:0 frame:0
TX packets:51972 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000 
RX bytes:24565172 (23.4 MiB) TX bytes:4149861 (3.9 MiB)
Interrupt:42 Base address:0xe000

lo Link encap:Local Loopback 
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6697 errors:0 dropped:0 overruns:0 frame:0
TX packets:6697 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0 
RX bytes:1228216 (1.1 MiB) TX bytes:1228216 (1.1 MiB)

wlan0 Link encap:Ethernet HWaddr 20:7c:8f:4b:e4:92 
inet addr:192.168.43.112 Bcast:192.168.43.255 Mask:255.255.255.0
inet6 addr: fe80::227c:8fff:fe4b:e492/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:33385 errors:0 dropped:0 overruns:0 frame:0
TX packets:29834 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000 
RX bytes:29576215 (28.2 MiB) TX bytes:4271975 (4.0 MiB)