3 nic and routing
Hi,
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(210.212.236.96/27). I have subdivided this into
groups of 16 each and one group is given for my dmz
(210.212.236.112/28)
First card eth0(210.212.236.97) connected to my cisco
router. 2rd card (eth1) to internal lan with pvt ips.
Third(eth2) (210.212.236.113) 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 210.212.236.105
I am able to ping to router and access net from the
firewall but unable to ping even the router
(210.212.236.105) 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
210.212.236.112 * 255.255.255.240 U
0 0 0 eth2
210.212.236.96 * 255.255.255.240 U
0 0 0 eth0
192.168.100.0 * 255.255.255.0 U
0 0 0 eth1
default 210.212.236.105 0.0.0.0 UG
0 0 0 eth0
For example, if I try to traceroute to
210.212.236.105, it reaches the correct card in the
firewall but from there it times out. (no ipchain
rules running right now).
Any suggestions ?
Suresh
=====
Suresh Kumar R.
Assistant Professor
Dept of Electronics & Communication
College of Engineering,
Thiruvananthapuram - 695 016, INDIA
Email : sureshkumar@ieee.org
Phone : 91-471-515660/515653/595634
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