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Message-ID: <032701c08544$becab580$77cb87d4@n3.uk.knowtion.net> From: "Peter Galbavy" <peter.galbavy@knowledge.com> To: "Ryan O'Connell" <ryan@complicity.co.uk> Cc: <nanog@merit.edu> Date: Tue, 23 Jan 2001 13:59:41 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Errors-To: owner-nanog-outgoing@merit.edu Yes, we intentionally (for some other reason during testing) set the MTU on the p2p link to 554 - oops. Will get it switched back... Still wondering though - if a normal dial-up has a lower than 1500 MTU, why would they work. Will let you know if this is the problem. rgds, -- Peter Galbavy Knowledge Matters Ltd. http://www.knowledge.com/ ----- Original Message ----- From: "Ryan O'Connell" <ryan@complicity.co.uk> To: "Peter Galbavy" <peter.galbavy@knowledge.com> Cc: <nanog@merit.edu> Sent: Tuesday, January 23, 2001 12:10 PM Subject: Re: clue for the clueless please > > On Tue, Jan 23, 2001 at 10:36:33AM -0000, Peter Galbavy wrote: > > The problem is the redirection from authentication -> mailbox. It just > > hangs. Tested with multiple browsers (lynx included ;) and all the same. > > What does telnet to port 80 reveal? > > If you can get short queries back (E.g. HEAD / HTTP1/0) but not longer > queries it sounds like a PMTUD problem. Does the new customer have Frame > Relay or any other links with MTUs less than 1500? > > Windows sets the DF bit on outbound packets, and I believe Microsoft > filter PMTUD ICMP packets. > > -- > Ryan O'Connell - <ryan@complicity.co.uk> - http://www.complicity.co.uk > > I'm not losing my mind, no I'm not changing my lines, > I'm just learning new things with the passage of time > >
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