I have seen some devices "leak" DHCP out through the WAN, but not
actually give out any IPs. Specifically, I've seen numerous Cisco PIX
firewalls do it, and I've also seen a couple of Belkin routers behave
this way. They trigger Mikrotik's DHCP alert, but they aren't
actually giving out IPs on the WAN segment. Perhaps this is what's
happening here...
Craig
Quoting Josh Luthman <[email protected]>:
Is the NSM2 in router or soho router mode?
What version is it? There was a bug where NAT wasn't doing NAT right.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Tue, May 1, 2012 at 10:54 AM, Stuart Pierce <[email protected]> wrote:
Well valid servers I think would be any mac address of what I
consider to be valid dhcp servers, so I only have one and that
is the Tik box itself.
But I see alerts saying an unknown dhcp server and the mac
address is that of a NM2 that is in router mode. It's WAN is the
WLAN and it's in dhcp mode and the WLAN is not part of the
bridge.
So either the NM2 dhcp server is leaking out of the WLAN/WAN
side or the Tik box is whhhhacky. Hard to tell which one
anymore.
---------- Original Message ----------------------------------
From: Josh Luthman <[email protected]>
Reply-To: Mikrotik discussions <[email protected]>
Date: Tue, 1 May 2012 11:51:37 -0400
What you're looking for is a MAC address that is hosting a DHCP
server
that shouldn't. You might need to whitelist your own if it's
the MT
itself, but definitely need to if it's another device on the
network.
I can't recall for sure.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Tue, May 1, 2012 at 10:48 AM, Stuart Pierce
<[email protected]> wrote:
I set up a Tik box to just see/test out the dhcp alert and
used
the mac of the Tik ethernet port that the Tik dhcp server is
using to give out ip addresses as the valid server.
So when I get an alert that a cpe, that is in router mode, is
an
unknown dhcp server.....what does that say ?
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