Linux VLAN

[C Choy <claybuddy () yahoo com>]

Has anyone tried using Nmap 2.53 on a Linux kernel running
with the VLAN 802.1q trunking patch?

The recommended usage of the the VLAN tagging is to have a
physical interface up with no address or mask (ie ifconfig
eth0 0.0.0.0 netmask 0.0.0.0).  Then add the trunked
virtual interfaces (ie vconfig add eth0 400).

This seems to confuse Nmap 2.53 (Prolly similar results
with other revs).

The routethroughdevice() function seems to work after
commenting out a check for null routes (which is what the
VLAN implementation needs)

It seems as though anything that requires a send_raw_XXX()
will try to route out the physical interface and not a
virtual.  An 'lsof' while trying to do a stealth scan gives
me raw sockets open as 0000000FF -> 000000000.

Everything works great for straight ethernet framed sending
(ie through eth0:1)  But Nmap tries to send out to a bad
route (I think) when I hook it up to a VLAN virtual (ie
vlan0400)

I've tried using the "-e" and "-S" options with no luck.

Does anyone have an idea of a work around or know where
Nmap could be getting confused?


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