Nmap Development: Re: [updated patch] Re: fragment scan got broken between 3.50 and 3.75

[Fyodor <fyodor () insecure org>]

On Tue, Jan 11, 2005 at 02:01:54PM +0100, Martin Ma?ok wrote:
> I have again updated the patch since. Now the data payload MTU can be
> specified using "--mtu N" too. It also tries to fragment all packets
> (ie. including pinging and OS fingerprinting besides just the scanning).
> The --packet_trace implementation was enhanced so now it tries to get
> more info from fragments than the previous one.
>
> For more, see
> http://Xtrmntr.org/ORBman/tmp/nmap/nmap-3.78-fragment.patch
Thanks - I have applied this for the next version of Nmap.  I also
went through your (long!) list of other patches at
http://xtrmntr.org/ORBman/tmp/nmap/ and applied them all except for:

CONNECT-closedflitered - I'm not sure how common this API response is
                         among platforms and it may confuse users.

defeat_ICMP_ratelimit - This will certainly speed things up, but there
                        is a risk of decreasing accuracy.

detect_TARPIT - This is a very cool technique, but I'm not sure it
  belongs in the core distribution.  For example, sometimes you might
  want to scan tarpits.  If it just printed a note in verbose mode
  about potentially tarpitted hosts, that might be better.

option-max_retransmissions - This might generate "bug reports" because
  it only affects port scanning, and not other aspects that retransmit
  such as ping scanning, idle scan, or OS detection.  But making it
  count in all these cases doesn't necessarily solve the problem,
  because you may not want to use the same value for every kind of
  retransmission.  Making the -T variables control this is a good idea
  though, which I should probably implement.  I'm just not sure I want
  a command-line parameter for it.

no_pcap_localhost_workaround - This might be OK, but I'm a wimp and am
  worried it would break something.  My main concern is that I don't
  remember the exact problem that required this workaround in the
  first place.  The workaround doesn't really hurt anything.

I hope to have a new version of Nmap out within a week or so.

Cheers,
Fyodor

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