Lesson 3

Dates: 2/5/2009
Linux networking
Linux for Engineering and IT Applications


Packet Routing

  • Unisys machines (no routing) 
    
[unisys14]# netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.5.0     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
0.0.0.0         192.168.5.240   0.0.0.0         UG       40 0          0 eth0

  • Our firewall, capone (routing between 192.168.5.0 and 128.6.238.64): 
    
[alexei@capone alexei]$ netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
128.6.238.64    0.0.0.0         255.255.255.240 U         0 0          0 eth0
192.168.5.0     0.0.0.0         255.255.255.0   U         0 0          0 eth1
127.0.0.0       0.0.0.0         255.0.0.0       U         0 0          0 lo
0.0.0.0         128.6.238.65    0.0.0.0         UG        0 0          0 eth0



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