Nmap Development mailing list archives
Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets
From: jah <jah () zadkiel plus com>
Date: Thu, 01 May 2008 00:23:38 +0100
On 30/04/2008 22:44, Brandon Enright wrote:
The end result of all of this is that Nmap can only make 11215879 unique IPs and that if you pass a number greater than about 64M to -iR you should be able to generate all of them. I have generated a list of 100M several times and confirmed that it always produces the same 11215879 unique IPs.
That's incredible. And particularly poor. Nice find!
The other (not mutually-exclusive) option available to us is to implement our own PRNG using Mersenne Twister or some other high-quality PRNG. This has a few advantages over what we have right now: * Even if OpenSSL isn't compiled in, we'll still have a good RNG source * We could implement a --seed option to generate the *same* set of IPs across all operating systems Nmap runs on * There is a big coolness factor associated with quality PRNGs ;-) ... If anyone thinks --seed would be useful now is the time to chime in!
--seed would surely be useful when testing stuff and needing to reuse the same random targets. MT can be made cryptographically secure too, according to the blurb http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/efaq.html <http://www.math.sci.hiroshima-u.ac.jp/%7Em-mat/MT/efaq.html> so there could be both options even without OpenSSL? jah _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://SecLists.Org
Current thread:
- [Bug]? -iR <num_hosts> on windows XP generates duplicate targets jah (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Fyodor (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets jah (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Fyodor (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (Apr 23)
- RE: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Thomas Buchanan (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Fyodor (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets jah (Apr 24)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (Apr 30)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets jah (Apr 30)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets David Fifield (Apr 30)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (Apr 30)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Kris Katterjohn (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Kris Katterjohn (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets doug (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets doug (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Brandon Enright (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets Fyodor (Apr 23)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets doug (May 01)
- Re: [Bug]? -iR <num_hosts> on windows XP generates duplicate targets doug (May 01)