Re: nmap performance -> timeout issue

[Martin Mačok <martin.macok () underground cz>]

On Wed, Apr 13, 2005 at 08:29:53PM +0200, Maarten Hartsuijker wrote:

> The first subnet I'm testing is /23, pix protected->icmp filtered and
> after finishing only half the scan after two days, I aborted and started
> tuning.

On filtered ports - does the firewall returns ICMP Destination
Unreachables? Are they rate-limited? If yes and yes, try this patch:

http://Xtrmntr.org/ORBman/tmp/nmap/nmap-3.78-defeat_ICMP_ratelimit.patch

(it should apply to 3.81 too)

Martin Mačok
ICT Security Consultant


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