They must have some sort of lookup going on. I've accessed via Tor and got presented with some additional authentication pages.
Don On 8/11/2012 1:21 PM, Guillaume Ross wrote: > I'm not a Facebook user so I can't easily test, but is it possible > that Facebook has anti-spam and anti-botnet processes that will scan > your IP in order to know if it is an open proxy? > Maybe that happens when you have an office with NAT and multiple users > coming from the same IP. > > Guillaume > > On 2012-08-09, at 1:15 PM, Wynn Fenwick <[email protected] > <mailto:[email protected]>> wrote: > >> Shaun, >> >> What IPS is it? >> "Coming from facebook" -- how is it determining that? >> What ports are being hit? >> >> Sometimes geolocation software will try multiple datagrams to your >> originating IP to assess the fastest data centre from which to >> deliver content to the requestor, but it is usually not spread across >> multiple TCP ports to my knowledge. The stimulus is likely a browser >> on your PC and your source IP is not known to Facebook (today). >> >> Another explanation is that numerous outbound TCP connections from an >> ephemeral source port will generate return SYN-ACK packets coming >> back to those multiple source ports... so perhaps your "IPS" isn't >> very state-aware. If the destination ports are > 1024 and are in >> sequence, then its likely that. >> >> Else it would be interesting to see the answers above. >> >> W >> >> >> On 07/08/2012 4:55 PM, Shaun Curry wrote: >>> >>> I have noticed some weird "stuff" coming from facebook. My IPS >>> blocked a "Probable Port Scan" from a facebook address going >>> directly to an internal machine. Has anyone dealt with this >>> before? How do I stop it without totally blocking facebook? >>> >>> >>> >>> Shaun >>> >>> >>> >>> _______________________________________________ >>> Pauldotcom mailing list >>> [email protected] >>> http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom >>> Main Web Site: http://pauldotcom.com >> >> _______________________________________________ >> Pauldotcom mailing list >> [email protected] <mailto:[email protected]> >> http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom >> Main Web Site: http://pauldotcom.com > > > > _______________________________________________ > Pauldotcom mailing list > [email protected] > http://mail.pauldotcom.com/cgi-bin/mailman/listinfo/pauldotcom > Main Web Site: http://pauldotcom.com
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