How to block nmap's uptime detection?
Alexander Demenshin <firstname.lastname@example.org>
Fri, 25 Jan 2002 04:45:54 +0100
On Thu, Jan 24, 2002 at 10:34:29PM -0500, Steve Snyder wrote:
> Running nmap against my firewall (from another network), it can
> successfully report the uptime of my firewall machine.
I am not sure but if you will drop packets to all unopened ports
(instead of rejecting those), it might help.
And, I found also that nmap's detection of uptime is unreliable,
sometimes it reports wrong uptime (for Linux 2.4 at least).
BTW, why do you want to hide this info? :)