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Internet hangs

Bob3975
Bob3975 asked
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Medium Priority
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Last Modified: 2010-04-11
Hello Experts,

The internet connection I have periodically hangs.  To insure you have as much info as possible I've created http://www.promonmc.com/_network/ which maps out the network and its settings.  

If I unplug the Linksys router for a few seconds the internet begins responding again.  Sometimes if I wait more or less 5 minutes and no internet access is attempted Xp Laptop will begin talking to the internet again, other times this doesn't seem to work.  Of course if you need more info I can provide it.  In the diagram I've not provided the settings for "W98 Laptop" since it doesn't matter if it is on or off, the internet still hangs.
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Commented:
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Les MooreSr. Systems Engineer
CERTIFIED EXPERT
Top Expert 2008

Commented:
Sounds like you might have a worm infested node on the network that eats up the CPU of the router after a period of time. Reboot the router, problem goes away-for a while. This is the exact symptoms of MSBlaster and Welchia worm.
Les MooreSr. Systems Engineer
CERTIFIED EXPERT
Top Expert 2008

Commented:
It's not in the router, it's on a workstation. The floods of packets overwhelm that little CPU in the router having to NAT every packet.

Author

Commented:
linksys router version is 1.43, sep 4, 2002

Author

Commented:
Irmoore - I have the latest Norton Antivirus and it doesn't see it.

sconstable - Looking at the Linksys web site, how do I know if I have the router w/4 port switch or router w/4 port switch ver. 3?
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Top Expert 2010

Commented:
The linksys firmware is a good place to start.  

Also, check the MTU setting on the linksys,  try 1400.   If its set higher,  I've seen linksys do wierd things.  My own experience with my home linksys.  

Author

Commented:
sconstable - I've upgraded the firmware, only time will tell if this does the trick.  I'll need to wait a few days before I can be sure and award points.  I'll be sure to let you know either way.

MikeKane - on http://www.promonmc.com/_network/BEFSR41Settings.htm you can see MTU is disabled.  What is MTU?  Should it be enabled?

aindelicato - thanks.  Are my settings ok?
Top Expert 2010
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Les MooreSr. Systems Engineer
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Top Expert 2008
Commented:
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Top Expert 2010

Commented:
I thought it odd also.  But this is personal experience here.    Definately worth a shot.   It sure couldn't hurt to try.
Les MooreSr. Systems Engineer
CERTIFIED EXPERT
Top Expert 2008

Commented:
Agree.
Could just be the router going bad...

<8-{

Author

Commented:
Turned out to be an easy answer for a bunch of points.  However you don't know what you do don't know until you're told you don't know it.  The network appears to be working fine after upgrading the firmware.  Thanks to all for at least trying.
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