does anyone understand how these products can inspect SSL?
Perhaps I could understand if it was just the bitorrent encypted
traffic... but surely SSL is designed to be encrypted end to end?
You'd have to intercept the certificate and replace it, prompting a
warning to the user.
The only other way I can think of would be something like a
cryptographic weakness in SSL or brute forcing it somehow, but this
seems like it would take a ridiculous amount of computing power and just
doesn't seem possible...
If SSL is truely decryptable on the fly in real-time in this way (or
even just from packet captures after some effort) it would effectively
render all e-business too dangerous to ever do again. I'd never buy
another book from Amazon ever again!
Anyone care to explain how these products are supposed to work and if
they really can decrypt SSL or if this is marketing speech for noticing
encrypted patterns which isn't the same thing?
-h
Hari Sekhon
Kevin Overcash wrote:
Breach Security has a product called BreachView SSL that passively decrypts SSL traffic for an IDS without terminating the SSL session. The product comes as either a software plug-in or an appliance.
http://www.breach.com/products_breachviewssl.aspI can't (although personally I
haven't encrypted bitorrent so
ko
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Panayiotis
Psihoyios
Sent: Thursday, March 08, 2007 10:01 AM
To: 'Ove Dalgård Hansen'; [email protected]
Subject: RE: Bittorrent - utorrent
Since it is going through SSL (and no IDS can look into SSL), you have two
options:
Plan A: Deny SSL traffic, but that usually this is not possible,
Plan B: Let your users out through a proxy server, which will identify
non-browser traffic using http/s header inspection. Configure your firewall
to permit HTTP/S out only from your proxy and not your clients.
Regards,
Panayiotis
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Ove Dalgard Hansen
Sent: Wednesday, March 07, 2007 9:38 PM
To: [email protected]
Subject: Bittorrent - utorrent
Hello Everyone,
I am in a bit of trouble,
On a network where i am configuring IDS - using ASA5510 + SSM module, we try
to deny access to Bittorrent downloads - it consumes quite a bit of bandwith
and is not allowed by the company's policy.
We try to filter bittorrent which succedes - but the utorrent changes
protocol and goes by the SSL port 443 and thereby circumvent the IDS, since
its not possible to see the encrypted traffic.
Does anyone out there have a good idea of how i am to solve the issue?
Best Regards
Ove Hansen
IT-Quality A/S
Banemarksvej 50F
Denmark - 2605
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