Weird results - frustrated

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance



Setup is as follows:
ISP is road runner - houston, tx
firewall zonealarm - tested both on enabled and disabled
Cable modem connected to linksys wrt54g wireless rounter
Windows 2003 server connected via lan to wrt54g
Multiple Windows XP clients connected via wireless to wrt54g

On Windows 2003 using IE 6
Slow browsing if any at all at times
can ping FQDN www.google.com sometimes fails sometimes successful
when fails I do nslookup and get response with IP addresses, sometimes
nslookup fails
when fails I ping IP addresses from nslookup with success

On XP machines connected via wireless
completed same procedures as above with same results

I have also tried connecting cable modem directly to computer bypassing
linksys router and same results
Tech support from road runner says no dns issues

What is this then????

P.S. Had very similiar issues about 2 months back, Tech support gave me new
set of DNS servers to try, resolved problem till now
Have tried both using these same DNS servers plus the DNS servers that ISP
DHCP pushes me with same results


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