parital connectivity under linux using DFE-538TX

i access internet using lan(via cable net) using DFE-539TX. i have windows 98 and
linux red hat 7.3 installed. While i can surf any website and use
yahoo messenger in windows 98, i cannot surf most of the sites in
linux and cannot use yahoo messenger. Only some sites like google.com
can be accessed by both linux and windows.I can get my mails using
email client in both linux and windows properly.

On analying TCP Dumps , i figured out that my machine sends TCP Reset
often..in linux while in windows it sends it rarely . In general
internet connection under  window is good while under linux is
pathetic!!!

To download these tcpdumps pls visit
http://groups.yahoo.com/group/BNPGs/files/ and dont forget to read
the "readme_first.html"

What to do so that i get same internet connectivity in linux as i get
in windows?

Before suggestion solutions, pls have a look at the number of
solutions already proposed by many networking experts and still the
problem remains.
http://www.experts-exchange.com/Networking/Linux_Networking/Q_20704833.html

-vishal
Pls send a CC of your response to
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