Re: Nmap 3.59ALPHA6: Release candidate

[Fyodor <fyodor () insecure org>]

On Sat, Aug 28, 2004 at 05:51:52PM -0500, eric wrote:
> On Fri, 2004-08-27 at 17:14:32 -0700, Fyodor proclaimed...
>
> Synscanning is seriously broken on FreeBSD. 
>
> For instance...
>
> $ sudo nmap -v -d -sT -T4 -p 80,443 140.192.1.0/24
> Nmap run completed -- 256 IP addresses (0 hosts up) scanned in 10.644 seconds
>
> $ nmap -sT -T4 -d -v -p 22,80 140.192.1.0/24
> Nmap run completed -- 256 IP addresses (16 hosts up) scanned in 12.600 seconds

Thanks for the report.  It appears to be the ping scanner that is
broken (hence "0 hosts up", so the SYN scanner is not tried).  I
investigated with my OpenBSD box and it looks like I forgot to set the
IP_HDRINCL sockopt.  Apparently Linux doesn't care, but *BSD does.
I'll have a fix for the next version, which I hope to release within a
day.

Cheers,
-F

PS: I also found a problem that could lead to a deadlock during a port
    scan (ALPHA6 only).  If you experience this, try adding
    "--min_parallelism 1" .  Will be fixed in ALPHA7.


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