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Vista/unable to load secure sites, XP will though

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Old 02-11-2008
Jimmy
 

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Vista/unable to load secure sites, XP will though

The issue at the hotel A is very very strange. What we have is when guests
with Vista notebooks go to say AmericanExpress.com, then they try to login or
create a new acct, they can not proceed and get an error of unable to find
the page. This is not true for all secure sites, I could log into my hotmail
and yahoo just fine, but financial institutions I could not, maybe they use a
higher level of security. With XP it works just fine. I took the same Vista
notebook over to the Hotel B (we also run the internet pipe into) and it logs
to the trouble sites just fine (pretty much mimicking the symptoms the guest
are seeing). Take Vista machine back to RI, page can not be displayed. It
seems to only affecting the Vista OS and some secure sites. I did extensive
research on it yesterday and discovered there is a issue with some net
security implementations that Vista uses vs. its predecessors (.…but that
then doesn’t explain why it works at the Hotel B and not A)…this is a known
Microsoft issue best I could dig up. I did some packet captures and I found
where comms is being dropped by the website

What would you speculate the cause of this is? I am showing a lot of tcp rst
between the website and client, unfortunately I have spent about 8-10 hours
trying to do research and figure this one out, its not a local configuration
issue (guessing) becuase take Vista notebook in hotel A, doesnt work, same
machine, Hotel B, works. Take XP machine, works in both Hotel A and Hotel B.

Attaching a packet capture....whats really odd is how with same network
(Hotel A) different OS, one goes to site, the other one doesnt.

Packet 38 shows the TCP Reset being flagged btw.

Thank you, (sorry, wouldnt let me post attachements)
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