[plug] cannot browse Internet

Mon Feb 27 07:47:58 WST 2006

It could be something as simple as MTU's... In the past I've had DSL 
connections refuse to load web pages because the MTU was too high. You 
could ping/ftp/telnet pretty much everything fine, and web content 
wouldn't work. Lowering the MTU to 1492, or below depending on 
connection type fixed this.

I have no idea why this would suddenly happen now though

Shannon

Jon Miller wrote:
> Having some issues where all PC's (windows and Linux) cannot browse the Internet.  When I do a ping to any domain/website I get replies ok.  If I do a telnet I get a disconnection /cannot connect message.  Yet if I web browse to my ISP (Amcom) it brings up their webpage and I can do the same to bring my own up (across a VPN connection).
> Initially I thought it was our firewall, but for port 80/http request from the Cisco router we go directly to the Internet..  from the Office router and firewall I can telnet to port 80/http.
>
> I'm stumped as to what could be preventing port 80 requests.  Using ethereal I can see SYN packets only.  I can however see that something from my workstation is trying to contact kernel.org (although) this is on a Windows desktop (XPPSP2).
>
> I've done a scan for viruses and spyware, I can see that my anti-virus scanner is shutdown which makes me thing this is a virus at work.
>
> Any ideas would be greatly appreciated.
>
>
> Jon
>   
> ------------------------------------------------------------------------
>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> <HTML><HEAD>
> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
> <META content="MSHTML 6.00.2900.2802" name=GENERATOR></HEAD>
> <BODY style="MARGIN-TOP: 2px; FONT: 10pt Arial; MARGIN-LEFT: 2px">
> <DIV>Having some issues where all PC's (windows and Linux) cannot browse the 
> Internet.  When I do a ping to any domain/website I get replies ok.  
> If I do a telnet I get a disconnection /cannot connect message.  Yet if I 
> web browse to my ISP (Amcom) it brings up their webpage and I can do the same to 
> bring my own up (across a VPN connection).</DIV>
> <DIV>Initially I thought it was our firewall, but for port 80/http request from 
> the Cisco router we go directly to the Internet..  from the Office router 
> and firewall I can telnet to port 80/http.</DIV>
> <DIV> </DIV>
> <DIV>I'm stumped as to what could be preventing port 80 requests.  Using 
> ethereal I can see SYN packets only.  I can however see that something from 
> my workstation is trying to contact kernel.org (although) this is on a Windows 
> desktop (XPPSP2).</DIV>
> <DIV> </DIV>
> <DIV>I've done a scan for viruses and spyware, I can see that my anti-virus 
> scanner is shutdown which makes me thing this is a virus at work.</DIV>
> <DIV> </DIV>
> <DIV>Any ideas would be greatly appreciated.</DIV>
> <DIV> </DIV>
> <DIV> </DIV>
> <DIV>Jon</DIV></BODY></HTML>
>   
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>
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>   