3 nic and routing
I am trying to setup a linux (debian potato, kernel
2.2.19) box as a firewall . I have 3 nics on it.
I have got a bunch of 32 public ips from my
isp(18.104.22.168/27). I have subdivided this into
groups of 16 each and one group is given for my dmz
First card eth0(22.214.171.124) connected to my cisco
router. 2rd card (eth1) to internal lan with pvt ips.
Third(eth2) (126.96.36.199) one to a hub which
connects to my machines with public ips (my dmz).my
dmz has proxy/mail/web servers.
My router ip is 188.8.131.52
I am able to ping to router and access net from the
firewall but unable to ping even the router
(184.108.40.206) from other machines connected
to eth1 or eth2. From all machines, I can ping all
cards in the firewall.
This is route output:
Destination Gateway Genmask Flags
Metric Ref Use Iface
220.127.116.11 * 255.255.255.240 U
0 0 0 eth2
18.104.22.168 * 255.255.255.240 U
0 0 0 eth0
192.168.100.0 * 255.255.255.0 U
0 0 0 eth1
default 22.214.171.124 0.0.0.0 UG
0 0 0 eth0
For example, if I try to traceroute to
126.96.36.199, it reaches the correct card in the
firewall but from there it times out. (no ipchain
rules running right now).
Any suggestions ?
Suresh Kumar R.
Dept of Electronics & Communication
College of Engineering,
Thiruvananthapuram - 695 016, INDIA
Email : email@example.com
Phone : 91-471-515660/515653/595634
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