Internet Connection Drops

[Herb]

I have a WinXP Pro computer with both wired and wireless connections. When I
boot the computer tehre is a window of approximately 10 mintutes during which
I can use the network connection. After that it simply fails! Attempts to
access the Internet result in a DNS failure.

IPCONFIG/FlushDNS does aboloutely nothing to fix the problem but if I reset
the connection with IPCONFIG /Reset then IPCONFIG/Renew it will work for
another 10 minutes or so and then fail again. This happens with both the
wired and wireless connections.

I've reloaded WinXP thinking that this would fix the problem for sure but
low-and-behold it is still doing the same thing.

My router is a Windows Server 2003 box that runs the Microsoft ISA Server
firewall. There are 100 or so other computers working behind this firewall
that do not encounter this issue.

Any help on this matter will be greatly appreciated.

Thank you, Herb

 

[John Wunderlich]

I have a WinXP Pro computer with both wired and wireless
connections. When I boot the computer tehre is a window of
approximately 10 mintutes during which I can use the network
connection. After that it simply fails! Attempts to access the
Internet result in a DNS failure.

IPCONFIG/FlushDNS does aboloutely nothing to fix the problem but
if I reset the connection with IPCONFIG /Reset then IPCONFIG/Renew
it will work for another 10 minutes or so and then fail again.
This happens with both the wired and wireless connections.

I've reloaded WinXP thinking that this would fix the problem for
sure but low-and-behold it is still doing the same thing.

My router is a Windows Server 2003 box that runs the Microsoft ISA
Server firewall. There are 100 or so other computers working
behind this firewall that do not encounter this issue.

Any help on this matter will be greatly appreciated.

Thank you, Herb

Try booting your XP machine into Safe mode with Networking and see if
the problem still persists.

If it works in safe mode, then use "msconfig" and lots of reboots to
find the application that is interfering with your connection.

Someone earlier complained of this problem and IIRC, he traced it back
to a Cisco VPN Client Software.

It's also possible that the speed/duplex of your network card is not
being sensed properly. Try taking it off of "Auto" and set it
manually.
Control Panel -> Network Connections -> [Right-Click your Connection]
-> Properties -> Configure -> Advanced -> Speed & Duplex

HTH,
John