From: offset (offset@svcroot.net)
Date: Tue Mar 21 2006 - 16:44:44 EST
Thanks for the suggestions, I'll read into those more.
Does anyone have any ideas on which kernel/tcp tuning parameters would be helpful to
investigate for large scale nmap/nessus scans? ( stuff in /proc, sysctl.conf, etc)
-off
On Mon, Mar 20, 2006 at 09:46:19PM -0800, David M. Zendzian wrote:
> Offset,
> The kernel does matter some, but overall the size of the box
> (cpu/memory) and the network connection will matter the most for
> large/extended scans.
>
> You may want to check (google) these options to see the best way of
> tuning based on the parameters available to your system:
> -T[0-5]: Set timing template (higher is faster)
> --min-hostgroup/max-hostgroup <size>: Parallel host scan group sizes
> --min-parallelism/max-parallelism <msec>: Probe parallelization
> --min-rtt-timeout/max-rtt-timeout/initial-rtt-timeout <msec>: Specifies
> probe round trip time.
> --max-retries <tries>: Caps number of port scan probe retransmissions.
> --host-timeout <msec>: Give up on target after this long
> --scan-delay/--max-scan-delay <msec>: Adjust delay between probe
>
> dmz
>
> offset wrote:
> >Greetings,
> >
> >Does anyone have any recommendations regarding kernel/tcp tuning for high
> >volume nmap/nessus type scans?
> >
> >linux kernel 2.6.9.34.EL
> >
> >I'm concerned about the machine freezing during an extended network scan
> >due to resource constraints on linux.
> >
> >The bulk of the nmap scans will be sT and sS.
> >
> >-off
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