RE: [nv-l] NAT problems

I use NetView for UNIX (on AIX). Have you checked the SNMP Configuration for
the IP address 123.123.123.123? You can setup a proxy for the target in the
SNMP configuration screen.

Hope this helps or applies to NetView on NT.

Ray Westphal
Enterprise Rent-A-Car

-----Original Message-----
From: Frode Jemtland [mailto:frode AT roal DOT no]
Sent: Wednesday, April 03, 2002 8:55 AM
To: nv-l AT lists.tivoli DOT com
Subject: [nv-l] NAT problems



Hello.

I have a problem with a NV installation for a ISP customer.

There is a firewall protecting the ISP from all of the customers, and each
customer has their own firewalls.

The problem is that the firewalls are using NAT. There no
problem
with the trap forwarding. But it is a problem with the status polling.

NetView is suppose to talk to a MLM at the customer site with the
public address 123.123.123.123 (bound to this host in the firewall NAT
tables). When NetView does a discovery for this node, it finds out
that the
real address is 192.168.1.10. Nobody is answering at this address (of
course), the node is marked down, even though the address (and
host name) of 123.123.123.123 can be SNMP browsed, and pinged. Can also do
the NetView test procedure for the object, both ping and demand poll
works.

Tech info:
Server: Win 2000 server, NetView 7.1
Node/MLM: Win 2000 pro, MLM for NT or win 2000 v. 7.1.0


Question:

Is there any feature in NV 7.1 that can be set, so NV knows that this
host (123.123.123.123) is a NATed host ?

Can I manipulate the route table on the server so every time it asks for
192.168.1.10 it is translated to 123.123.123.123 ?

Can I manipulate the firewall at the ISP site so it reNAT's the address
from 192.168.1.10 to 123.123.123.123 ? (probably not a good solution, but
a desperate one ;) )

I have heard about something called Tivoli CNAT, what is this, and can
it solve my problem ?!


Please ask me if any thing is unclear.



ASCII drawing (if it helps?!)

-----------------------------------------------
 10.100.1.10  nat>          <nat  192.168.1.10

 |----|       |---|         |---|       |----|
 | NV |-------|fw1|---------|fw2|-------|MLM1|
 |----|       |---|         |---|       |----|
      |                                 |
      |<-------------------------------<|
      |  trap forwarding - OK
      |
      |>-X
      |  status poll to 192.168.1.10 - unknown address

----------------------------------------------



------------------
 Frode Jemtland
 ITS - IBM Norway
------------------



---------------------------------------------------------------------
To unsubscribe, e-mail: nv-l-unsubscribe AT lists.tivoli DOT com
For additional commands, e-mail: nv-l-help AT lists.tivoli DOT com

*NOTE*
This is not an Offical Tivoli Support forum. If you need immediate
assistance from Tivoli please call the IBM Tivoli Software Group
help line at 1-800-TIVOLI8(848-6548)