Re: Failure with single web site (detailed)

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"Malke" <notreally@xxxxxxxxxxxxxxx> wrote in message
news:Op0DAureHHA.4020@xxxxxxxxxxxxxxxxxxxxxxx
Kevin Underriner wrote:
Problem: unable to connect to a single web site (www.linkedin.com;
69.25.56.150).

Summary: I have no idea if this is at all possible ... it seems as if
there is something preventing HTTP traffic to and from IP address
69.25.56.150 on only the afflicted machine.

Details:

System is Windows XP with all current service packs and updates.

Browser failure is with both ie7 and firefox (both updated with all
current packs/patches).

Problem has started very recently - web site was actively used up to
three days ago.

No changes were (consciously) made to the machine.

DNS resolution is fine. nslookup www.linkedin.com responds with
69.25.56.150.

ping works fine (ping www.linkedin.com or ping 69.25.56.150).

Site is accessible from another machine on the same network (this
eliminates any weird route caching on the network hardware).

Hosts file has nothing of interest.

Other linkedin ip addresses work (http://69.25.56.151), but any
redirection to a link with www.linkedin.com in the address fail as this
of course goes back to 69.25.56.150.

No proxies exist - direct network connection.

Problem is unaffected by the use of firewall (sygate), or any of the
Norton security stuff.

Spyware - clean. Adware - clean. Hijackthis - clean.

ipconfig /release, /renew, /fushdns, /registerdns - no affect.

Of course there were many (many) reboots during the diagnostics and
testing issued above.

Do you have any antispam type of software running? I see you have a Norton
product and I believe they have an antispam function in some of their
software. It may be that a recent update to an antispam type of program is
identifying this website as spam. SpywareBlaster also does this sort of
thing and Spybot Search & Destroy has an "immunization" feature but IIRC
only for IE.


I ran tests with and without antispam, firewalls, security, etc. So, to
answer your question, no, I do not have any antispam software running.

Also, on rereading my original post, there may be some confusion - all web
sites that I've tried succeed perfectly. Only 69.25.56.150
(www.linkedin.com) fails.

Additional Diagnostics:

69.25.56.150 is www.linkedin.com
69.25.56.151 is another ip address for some part of the linked in pages, but
not the regular site

telnet 69.25.56.150 80 - this fails (times out)
telnet 69.25.56.151 80 - this succeeds

The telnet test isn't that surprising - same results can be seen from a
browser. The telnet test does however eliminate the problem being specific
to ie7 or firefox.

We also know that not everything is blocked to/from 69.25.56.150. Both ping
and "telnet 69.25.56.150 25" succeed. Port 25 is SMTP.

BTW - all command line tests are run from cygwin.



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