Strange network problems...

[Marcus Williams]

On 08/01/2009 16:16, Marcus Williams wrote:
> We've started to get really odd network problems at work. It feels like
> a NAT problem but I havnt really got a clue as I cant track it down. The
> easiest way to reproduce it is from a browser - I can be happily
> googling when suddenly I'll get back an error from google saying my
> request wasnt understood. The strange thing about this is it appears to
> be someone elses request to a different site if that makes sense. So
> google is getting an HTTP request for something like /myspace/photo.jpg
> or a mangled version of my request.

A more concrete example - one of our java apps talks to a pop3 server on 
our network (via port 110). Every now and again we're getting this 
exception (with a different Unexpected response message each time):

javax.mail.MessagingException: Connect failed;
   nested exception is:
     java.io.IOException: Unexpected response: GET 
/search?q=pdf2ps&rls=com.microsoft:en-gb:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7GFRD_en-GB 
HTTP/1.1
     at com.sun.mail.pop3.POP3Store.protocolConnect(POP3Store.java:161)
     at javax.mail.Service.connect(Service.java:288)
     at javax.mail.Service.connect(Service.java:169)
     at 
com.kyaksystems.ICTModelTool.Server.EMailClient.run(EMailClient.java:81)

... so in this case the POP3 connection somehow got the search request 
for pdf2ps from a different machine.

Still no clue whats causing it.

Marcus