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Old 09-23-2003, 11:12 AM   #1
LQ Newbie
Registered: Sep 2003
Location: Salt Lake City, Utah
Distribution: Red Hat 9
Posts: 22

Rep: Reputation: 15
Gateway issues - can't ping certain hosts on attached network

Our network is setup like this:

Internet ---[x.x.x.x] gw/firewall 1 [] --- network --- [] cisco gw2 [] --- network

The gw1/firewall is a Watchguard technologies FireBox. The cisco gw 2 is a 10Mbit Cisco 1600 series router.

Most machines on the network can see everything in the network great, including the firebox ( Most machines being Windows NT/2000 and HPUX.

However, we have two Redhat 9 machines that can't ping most of the time, and can sometimes. The route seems to come and go. All the machines have a default gateway of

I think the problem is that the machines on can't send a reply. Their default gateway is

The gw has this entry in its routing table:

net (it won't let them put in /24 strangely)

It can ping (NT Server) and (HPUX 11) but can't ping (RH 9) It also can't ping (our end of the Cisco router)

They have to add a direct host route to be able to reach the Linux box: gw

This is added to the firebox, and then any machine on can ping Linux just fine! They have to add another entry to be able to ping

Why is this? Why doesn't the initial network route on send them over here? What is going on? Any ideas?

Any computer in can have the route added: netmask gw

and that computer can see any of our machines (including Linux) but the gateway won't do that...

Thanks for any insights!
Old 09-24-2003, 02:59 AM   #2
Registered: Aug 2003
Location: Seattle, Wa
Distribution: Fedora,Trustix,Debian
Posts: 290

Rep: Reputation: 30
If you have a dhcp server you could set it up to send out those static routes as part of the ip lease.


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