Nmap Development mailing list archives

Re: [NSE] HUGE ssl-enum-ciphers speed improvement


From: Kris Katterjohn <katterjohn () gmail com>
Date: Thu, 12 Jul 2012 17:53:59 -0500

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Hey Dan,

On 07/12/2012 04:37 PM, Daniel Miller wrote:
List,

I've found a way to vastly improve the speed and efficiency of the 
ssl-enum-ciphers by letting the server choose ciphers instead of trying
every single one. First, the numbers, based on a scan of nmap.org, port
443. Before: 858 Client Hello messages, 9.56s NSE time. After: 24 Client
Hello messages, 3.07s NSE time.


I thought this sounded cool so I gave it a quick try against nmap.org and
gmail.com:

Unpatched: Nmap done: 2 IP addresses (2 hosts up) scanned in 20.16 seconds
Patched: Nmap done: 2 IP addresses (2 hosts up) scanned in 4.64 seconds

And the only difference I saw was the addition of DEFLATE with nmap.org as
you mentioned.

Nice.

Dan


Cheers,
Kris Katterjohn

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