windows 2000/XP ignore icmp routing redirect

[Marco Berizzi]

Hello everybody.
This is my network diagram:

+----firewall-router----
|
|
+---internal network 1.1.1.0/24
|
|
+---internal network 172.16.1.0/24

Internal networks 1.1.1.0 & 172.16.1.0 share
the same hub/switch. The firewall has both ip
on its internal NIC: 1.1.1.254 and 172.16.1.254
When I ping from a 172.16.1.0 network host
(172.16.1.16 for example) to 1.1.1.0 (1.1.1.69
for example), the firewall send an icmp routing
redirect, but both windows 2000 and XP ignore
them.
Clues?

EnableICMPRedirect is set to 1

 

[Andrei Ungureanu]

I think you are missing a very important part of the tcp/ip networking.
You'll need a router to route between 2 different subnets and if you
firewall will not do that (and is setup as a gateway for your hosts) I don't
get how the ICMP redirect will help you (maybe only if it will send the host
to the proper device that is doing the routing between subnets).


--
Regards,
Andrei Ungureanu
www.eventid.net
Test our new EventReader!
http://www.altairtech.ca/eventreader/default2.asp?ref=au