Re: UDP scans

[don () mainframe dgrc crc ca (Donald McLachlan)]

> From igor () txc com Wed Feb 24 11:46 EST 1999
>
> On Tue, Feb 23, 1999 at 02:17:13PM -0500, Donald McLachlan wrote:
> > I find it interesting that the "rough table of current Nmap operating system
> > support: " does not mention "UDP scan (-sU)".  I'm trying to use this
> > on Solais 2.5, 2.6, and 7 to no avail.  Has anyone successfully built
> > nmap for UDP scans for these versions of Solaris?
> >
> > I suspect nmap is not properly "detect[ing] this rate limiting and slow[ing]
> > down accordingly" as documented in the on-line man page.  :-(
> >
> > Is it feasible to add an option to specify an inter-UDP probe delay?
> >
> > Don
>
> nmap-2.08 runs fine with -sU under Solaris 2.x for me.
> I've had the same problem with earlier versions.
>
> Igor

I just compiled nmap-2.08 on:

        SunOS `hostname` 5.5 Generic sun4c sparc SUNW,Sun_4_75

and ran "nmap -sU" against:

        SunOS `hostname` 5.5 Generic_103093-25 sun4m sparc SUNW,SPARCstation-10

It scanned 1029 ports in 38 seconds.  That is ~ 27 ports per second.  This
is far in excess of the 2 messages per second quoted for Solaris in the
man page.  Any suggestions what to try next?

Don