Nmap Development mailing list archives
Re: Nmap question (timeout versus scan-delay)
From: Martin Mačok <martin.macok () underground cz>
Date: Thu, 5 Oct 2006 17:38:48 +0200
On Thu, Oct 05, 2006 at 11:08:02AM -0400, John P. Wilson wrote:
If scan-delay is zero (which I assume it is by default) then I suppose multiple probes can be sent to multiple ports at once, right (parallel probing)?
Yes.
If scan-delay is greater than zero then, as you point out, this enforces serialization - only dealing with one probe at a time.
Not exactly true because scan_delay could be smaller than timeout and next probe can be sent out before giving up waiting for reply to previous probe.
Is there ever a case where multiple probes are sent all at once to one port?
I don't know of any.
If no reply is received and timeout expires, and if there are still retries to perform, is the probe sent out immediately, regardless of what scan-delay is set to?
No, if scan_delay is greater than timeout then the next probe will not be sent sooner than scan_delay after previous probe was sent.
Also: must scan-delay be greater than timeout?
No. Martin Mačok ICT Security Consultant _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://SecLists.Org
Current thread:
- Re: Nmap question (timeout versus scan-delay) John P. Wilson (Oct 05)
- Re: Nmap question (timeout versus scan-delay) Martin Mačok (Oct 05)
- <Possible follow-ups>
- Re: Nmap question (timeout versus scan-delay) John P. Wilson (Oct 05)