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Old 11-03-2004, 03:12 PM   #1
sujte
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RH blocking the network


I have RH AS Version 3 running on a Dell 2450. I am using it as a simple web server. Up until today there have been no problems. There is an eth0 and eth1. eth1 is inactive, and eth0 is active. Using the graphical interface I attempted to delete eth1 because it was not being used. But after being 'deleted', it still shows up in the GUI as inactive.

Anyway, the real problem is that after doing that, the web server is somehow blocking network access to the internet. No one in the office can reach the internet when the web server is up. When I shutdown the web server we can get to the internet with no problem. Any ideas?
 
Old 11-03-2004, 03:19 PM   #2
ugge
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How are your network setup? Firewall, routing, OS.
Are the web server on a DMZ or on your regular LAN?
Can you see if the packets reach your gateway, or if they are directed to your web server?
 
Old 11-03-2004, 03:36 PM   #3
sujte
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we have a very simple network. one router/firewall connected to the modem. I use static IPs for the servers and an IP pool for the users workstations. Everyone is on the same lan/subnet. etho0 is setup as 172.31.100.118 and eth1 as 172.31.100.119.
 
Old 11-03-2004, 03:40 PM   #4
ugge
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What kind of router/firewall do you use? Linux?
Can you check the router to see if the packets arrive there?
 
Old 11-05-2004, 10:33 AM   #5
sujte
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We use a netscreen hardware firewall. I did find the problem. Another tech was setting up another linux box and used an ip that was in use on the current linux box. For some reason when they were both up, network traffic was blocked. We changed the ip on the new box, and things work fine.
 
Old 11-05-2004, 10:52 AM   #6
ugge
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Just curious if we can resolve the problem, knowing what caused the block.
Was anyone of those two mchine a gateway for your Internet connection? or a proxy of some kind?
 
Old 11-05-2004, 12:23 PM   #7
Kriptis
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it was a duplicate IP address error.....
 
Old 11-05-2004, 12:31 PM   #8
ugge
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Yes I know. Only wanted to find out HOW that duplicate IP blocked all internet traffic. If the network was brought down due to ARP or if it was something else causing the total block.
 
  


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