Endpoint Protection

From about two days, I can't access https://www.dropbox.com from only one machine (Windows server 2003 R2 machine) while from all other clients in the same Windows domain I can access the same site without issue.

I've repeated the access via Chrome and I.e. 8 with the same result:

Chrome:

I.e. 8

I haven't no firewall that block any IP, protocol, etc...

Any idea

Does have you try different user ID ? have you clear Old IE Cashes ?

Does you have try disabled SEP client ? What SEP feature do you have installed ?

Check your traffic log, do you have a firewall rule in place to block traffic over 80/443?

Even if I change user is the same.

Because is a server machine I've installe only Antivirus and Antispyware protection.

Even if I empty cache on I.e. or chrome, nothing change.

I've just checked firewall logs:

no ports are blocked in anyway

And if you disable SEP it works?

Worked before SEP was installed?

No, even if I disable SEP I've the same issue

That Issue are not related to SEP Client.

Does machine having full internet access ?

Ok, so it's not SEP related...

Do you have an IP address? Can you ping www.example.com?

Yes.

Without restrictions

Try navigating to a non-SSL website such as http://www.example.com

Do you have a firewall or proxy in place at your gateway? Can you get to any other websites or are all blocked?

Yes I can ping all ip address (and www.dropbox.com too)

And you can navigate to some other site other than drop box?

Problem solved!

I've just uodated the Windovs 2003 Server machine via Windows Update (only Critical updates) and, now, I can access dropbox site without any issue.

Tanks to all.