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 From:  mtnbkr <waa dash m0n0wall at revpol dot com>
 To:  =?UTF-8?B?V8WCb2R6aW1pZXJ6IEZyxIVjemVr?= <wlodek at widar dot lublin dot pl>
 Cc:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] Can't ping
 Date:  Fri, 24 Feb 2006 08:23:20 -0500
WÅ‚odzimierz FrÄ…czek wrote:
> Hello
> I try to use m0n0nowall ver.1.21 but have troubles on begining. 
> My first m0n0 NIC ( LAN ) -
> I create VLAN ( parent interface - LAN ) and give address ( OPT1 )
> Next I link my PC ( my address ) to LAN 
> I can ping of course to LAN and after adding a trace to the routing table in my Windows to OPT1
> But if I change my PC adress to for example I can't ping nowhere ( OPT1, LAN )
> Please explain me why ?
> WF

Basic reason is that your PC has not been configured to understand/work
with 802.1q (VLANS).

Your m0n0wall's VLAN interface, listening on, will only
respond to packets that are tagged with 802.1q information for the VLAN
you have configured. Your computer is sending NON-802.1q tagged ethernet
frames, and as such your m0n0wall is seeing them on its LAN interface,
and is probably dropping them, or just allowing them to pass (default
m0n0wall LAN rule is to allow all)

You will need a switch that supports VLANS (802.1q) to begin with.

Check out the following links for more information on VLANS:


Bill Arlofski
Reverse Polarity