Re: Display Response Times???

[Brandon Enright <bmenrigh () ucsd edu>]

On Wed, 2006-06-07 at 11:46 -0700, Jerry Baker wrote:
> Despite having searched for a way to do this for several hours, I
> cannot 
> locate a method to force nmap to display response times for each 
> connection. I need to scan a port range and get some sort of useful 
> round trip time information for each port. It can be time to receive 
> first ACK, total time to set up connection, or whatever. I just need 
> some measure of how long it took for the server to respond on each
> port.
>
> Is this at all possible with nmap?

It is possible to gather that information albeit not in a very compact
format.

You want either -d3 (debug level 3) or --packet-trace.  A quick and
dirty Perl script should be able to get the time difference between
sending and receiving.  You'll probably also want to use -n and -P0 in
conjunction with --packet-trace to reduce the amount of noise to sort
through.

Ex:

# nmap --packet-trace -n -p 80 -P0 google.com

Starting Nmap 4.03 ( http://www.insecure.org/nmap/ ) at 2006-06-07 19:01
UTC
SENT (0.0310s) TCP x.x.1.162:39134 > 64.233.167.99:80 S ttl=41 id=24537
iplen=44 seq=1891025424 win=2048
RCVD (0.0960s) TCP 64.233.167.99:80 > x.x.1.162:39134 SA ttl=239 id=9801
iplen=44 seq=1757190416 win=8190 ack=1891025425
Interesting ports on 64.233.167.99:
PORT   STATE SERVICE
80/tcp open  http

Nmap finished: 1 IP address (1 host up) scanned in 0.110 seconds

Hope that is what you are looking for.

Brandon

-- 
Brandon Enright
Network Security Analyst
UCSD ACS/Network Operations
bmenrigh () ucsd edu




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