slow SYN stealth scan

grinhildo

New Member


Messages: 1

Hi,

I have newly installed FreeBSD 7.2. I've compiled nmap and it's wotking but SYN stealth scan is very very very slow. I've disabled ipfw and pf with rc scripts but with no success.

Where can be the problem?
 

BuSerD

Member

Reaction score: 7
Messages: 74

It may be useful for you to post the results of your delayed scans vs typical scans that do not display the same issue.
 

SirDice

Administrator
Staff member
Administrator
Moderator

Reaction score: 8,741
Messages: 33,023

If the target host isn't returning anything scanning will be very slow.
 

anomie

Aspiring Daemon

Reaction score: 120
Messages: 781

Considering the large number of service ports you're likely scanning, and the fact that hosts on the receiving ends of your scan may be dropping tcp connect requests... you could be waiting awhile.

There is a "timing template" option that allows you to tweak timeout behavior, but that may be a can of worms in of itself depending on what you're doing and whom you're scanning.
 
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