TCP Sequence numbers.

From: Garry Optland <garry_at_pp.nsw.gov.au>
Date: Wed, 27 Jan 1999 10:47:03 +1100 (EST)

Hi all,

I have clean installed DU4.0E, on a PWS433au with no graphics card,
mandatory subsets only. I am using enhanced security.

If I do a "nmap -O" for the machine, I get a worrying message from nmap:

TCP Sequence Prediction: Class=constant sequence number (!)
                         Difficulty=0 (Trivial joke)

This is the only 4.0E machine I have access to. Other machines with DU3.x
or 4.0A-D seem to at least change the sequence number.

Is there any way to change how DU generates sequence numbers? Has anyone
used nmap -O against a DU4.0E machine with different results?

Any help appreciated.

Regards,
         Garry.
Received on Tue Jan 26 1999 - 23:48:17 NZDT