Nmap Development mailing list archives
Re: How to find MAC address
From: Andreas Ericsson <ae () op5 se>
Date: Fri, 31 Mar 2006 14:33:27 +0200
Martin O'Neal wrote:
We're not going to agree on this; the answer *was* misleading. You stated that MAC addresses were lost as soon as they go through a router, which is incomplete. They are lost from IP, they are not lost in entirety.
That's a bit like saying what you flush down the toilet doesn't vanish entirely. The question is just how much muck you're prepared to go through to get it. In that sense you'd need to apply physical violence to the nic in order to lose the MAC address entirely. What I (and Brandon) *meant* was that the information is not included in the ethernet header that reaches the destination host. I shall try to be more explicit in the future.
Nmap may not gather MAC addresses using alternative mechanisms at the moment, but there is no reason that it can't. It already interacts with higher protocols, like RPC and NetBIOS name service, from which it already gathers the hostname. The mac address is available via the same interface.
If you want to suggest improvements to nmap just spit them out. Preferrably accompanied by a patch, I imagine. Given your apparent expertise in the field I should think you're well up to the task.
FYI, MS NetBIOS is broadcast which also only works on local subnets,Er, FYI it is neither limited to broadcast, nor limited to local subnets. Another misleading answer.
I stand corrected. -- Andreas Ericsson andreas.ericsson () op5 se OP5 AB www.op5.se Tel: +46 8-230225 Fax: +46 8-230231 _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev
Current thread:
- How to find MAC address uday kumar kunta (Mar 31)
- Re: How to find MAC address Andreas Ericsson (Mar 31)
- Re: How to find MAC address Brandon Enright (Mar 31)
- <Possible follow-ups>
- RE: How to find MAC address Martin O'Neal (Mar 31)
- Re: How to find MAC address Andreas Ericsson (Mar 31)
- RE: How to find MAC address Martin O'Neal (Mar 31)
- Re: How to find MAC address Andreas Ericsson (Mar 31)
- RE: How to find MAC address Martin O'Neal (Mar 31)
- Re: How to find MAC address Fyodor (Mar 31)
- Re: How to find MAC address Andreas Ericsson (Mar 31)
- RE: How to find MAC address Martin O'Neal (Mar 31)
- Re: How to find MAC address Martin Mačok (Mar 31)
- Re: How to find MAC address Kurt Grutzmacher (Mar 31)
- Re: How to find MAC address Martin Mačok (Mar 31)
- RE: How to find MAC address Martin O'Neal (Mar 31)
- RE: How to find MAC address Yudson, Marc CTR MDA/ION (Mar 31)