Question : sbs 2003 wont load some webpages

Hi All

I have a sbs2003 box. It uses a single NIC to a router. From the server I am unable to load certain webpages i.e. www.msn.co.za, www.yahoo.com, www.hotmail.com, www.speedtest.net etc.
Some webpages load fine and others dont. I have checked that my DNS is working and it resolves. I have changed DNS's and still have the same problem.

Anyone got any ideas or suggestions?

Answer : sbs 2003 wont load some webpages

Thanks guys, tried all of the above... what i found extremely strange is if i plugged myself either directly into the adsl router then browsing etc was fine, but yet through the server i had this problem...


Resolution....
i replaced the adsl router and all suddenly perfect and normal....  ( I still don't comprehend..)