Nmap Development mailing list archives

Re: OS fingerprint extraction quality -- solved in r11437


From: "Rob Nicholls" <robert () everythingeverything co uk>
Date: Fri, 19 Dec 2008 23:49:31 -0000 (UTC)

This fixes the following bug: When scanning with an Ethernet handle (as
opposed to raw sockets), only the first host in an OS scan group would
get a result. All others would be blank fingerprints with R=N for every
probe. This was first noticed on Windows because Ethernet is the default
sending method, but it affects other platforms with --send-eth.

That's great news, and hopefully matches what I saw today: I could only
get expected results when I set --max-hostgroup to 1; any other value
would give me unusual results (some were less accurate, some had "No OS
match"). I also tested a few versions of Nmap going right back to Nmap
4.20, which exhibited the same problem. I'll try compiling and testing the
latest revision over the weekend.

Rob


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