SSL Ciphers IIS 5.0

Posted on 2005-03-21
Medium Priority
Last Modified: 2009-07-29
A recent security scan on an IIS 5.0 box discovered that the server allows weak ciphers.

I found out how to to disable unwanted ciphers, but I am unsure which to disable.


I want to disable anything less than 128-bit encryption.

Question by:testtest25
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Accepted Solution

spacity69 earned 2000 total points
ID: 13592456
I would only enable the ones with 128/128 or higher. RC2 would also be disabled on my servers. You also should only enable SSLv3.


Expert Comment

ID: 13596252
Agreed. use 128 and above and you should be ok.

the only thing to watch out for is that if you have users with older browsers, they may not be capable of the higher levels (128+) and by leaving the ciphers it allows clients (eg browsers) to negotiate a lower level of encryption.

Most people dont even realise this.

Expert Comment

ID: 13601962
True, the user just asked about 128 though. I usually leave a export 40 bit enabled with a step up certificate then have the webserver display a nice message saying hey you need 128 bit ssl to use the rest of my site.

I use Iplanet web servers though not iis :)

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