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 From:  "Barry Mather" <barry dot mather at dorecentres dot com dot au>
 To:  <m0n0wall at lists dot m0n0 dot ch>
 Subject:  RE: [m0n0wall] SNMP over IPsec VPN
 Date:  Tue, 5 Oct 2004 15:54:08 +1000
This is very odd, and must be a specific thing to m0n0 as I have snmp
walking and mrtg-ing perfectly using sonicwall kit ... through ipsec
tunnels ...

I have also tried a lot with m0n0 but with no success ...

One thing have not tried is running a packet sniffer on either end of
the tunnel, would be interesting to see where the packets go with an
snmp walk...

Just my 2c

-----Original Message-----
From: Chris Buechler [mailto:cbuechler at gmail dot com] 
Sent: Tuesday, 5 October 2004 3:20 PM
To: m0n0wall
Subject: [m0n0wall] SNMP over IPsec VPN

SNMP can't be queried over an IPsec VPN tunnel.  Several of us in
#m0n0wall have tried this and it doesn't work.

This has been discussed before on the list in this thread:

And the general consensus was "there is no reason it shouldn't work",
but it doesn't.

From remove VPN, if I nmap UDP scan the LAN IP of the remote m0n0wall,
it shows 161/udp open.  But snmpwalk won't pull anything.  Not getting
blocked by the firewall.

I know there are workarounds, but some enlightenment on a solution or
why it doesn't work, for documentation purposes, would be much


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