Nmap Development mailing list archives
Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk
From: Kris Katterjohn <katterjohn () gmail com>
Date: Wed, 10 Nov 2010 19:33:08 -0600
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 11/02/2010 02:54 PM, Kris Katterjohn wrote:
On 10/18/2010 08:05 PM, Ron wrote:I didn't really collect much information, I was hoping there'd be an obvious cause. What I *can* tell you is that it didn't fail for every host, just for one or a couple.
<snip>
Thanks. Sorry, I've been busy and I forgot about this. If possible, can you find the smallest scan (hosts and ports) which still causes this problem and send me the output with debugging and script/packet tracing turned on (off-list with altered addresses if you want)? I can search through the output if you can't narrow it down much, but it would just be helpful if you can find a single host and port which can still cause this, if the problem can even occur that way. I'll try to examine this as soon as I can after I receive it and get back to you (and the list) with something.
Last week Ron and I were discussing this and he sent me all kinds of data I wanted to examine. However, I'm having a hard time seeing any reason why these failures are occurring (maybe it's a weird Linux fluke since he said he's tested on Linux distros? But then I would presume this would occur for more hosts for more people). I'll still look into it further when I have time. In r21016 I've changed it so that raw IP send failures in NSE don't cause scripts to bail with a backtrace. This was actually the original design but was changed in r20267, which was why the error Ron saw was so prominent (path-mtu is designed to recognize send failures and just drop an MTU level and try again). Cheers, Kris Katterjohn -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJM20fTAAoJEEQxgFs5kUfu8cAP/0LJzmi2ih6yOCFxlJBhNDLZ uPdQiVmtbdAvog8tD8+XwYiFgNQU/QzLPso3dVAymBhui1VALYnpHWKad4v13iR+ 0yZk2xVAEOgqOzG3wH/D6PPqTV+7DW3X6oB2QPGPpm/uJs4PFWB8CaA3q8lH+POa H4NpYE31VrinuTXFFfBneTq/cC5JuHWDUFfOHUymTUm1ApsZjfws9j9WqS1gG2FG ARFiBPKAbln4vNLiEQ+KuLVlWe9BmxMED6326kVErrjDWG7c6JU2WX0bUNc2p9so B/0r6XLNmy5VOOHkrPutTSc9G5HKno9teL7X2p/HVJAZ5lAMfhUlA7lIwsrHkXFx thKpmkGpfpqESmj3noPsXos7qq2Tr4d1yHBo/S3YYiEcxTzj2H8FVSVUwfKUSsVK KOKqciCpjKQtDvtlWxmS8M/DygL4fMe+nuM9pZcSj9Fcwr4y+veT36rm/Dc0UU7T 8HWfTAOhlzjuYiKkdEcZIfgcE3GTfIx8iJDfe5XdhFoLe7tD67M6trbSd1BpknFl XJSyKLK5/B6bGnEeU9rIKiqeFlEZfWzOU/jLJ0aXfG6/GWkqDsaxF/G5OmGkne0y aqoHRzCfzODh8h2lHsJIquLpjYMHAcxW5U5ec9j1k8PsNQ+2TDpTEMg7mZsXT0nX VV/CYsUhZVcjdlqaQNwC =bfhO -----END PGP SIGNATURE----- _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://seclists.org/nmap-dev/
Current thread:
- [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Ron (Oct 18)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Kris Katterjohn (Oct 18)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Ron (Oct 18)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Kris Katterjohn (Nov 02)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Kris Katterjohn (Nov 10)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Ron (Oct 18)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk Kris Katterjohn (Oct 18)
- Re: [NSE] errors: path-mtu, dns-cache-snoop, and firewalk David Fifield (Nov 02)