Corey Hudson wrote:
>> I'm trying to connect from the external interface
>> with SNMP to a host on the internal network. But I
>> can't get it to work.
>> 
>> Can anyone tell me how I should do? How do I write
>> the filter? Should I use IP pass through?
>> 
>> External ip: www.xxx.yyy.zzz ("Internet")
>> Internal ip: 192.168.10.2 (NAT)
>> Protocol: UDP/SNMP (I'm running mrtg on the external host)
>> 
>> Thanks in advance.
>
> Jonas,
> 
> Your best bet is to set up an in bound tunnel using port 25 and then
> provide the Remote Access filter from 0.0.0.0 to the external ip address of
> your firewall.  There is an example of this in the manual under appendix C,
> example 1.  It is showing 4 tunnels (web, ftp, DNS and e-mail).  In your
> case you would only need the one tunnel.  However, if your DNS is behind
> the firewall your most likely going to need the tunnel and filter set up,
> as well.

What do you mean? Port 25?

My scenario:

External                     Internal
-------------------------------------
Linux       ->    FW    ->    Cisco
(mrtg)          GnatBox       Switch

mrtg uses snmp to poll for statistics from the switch.

Would appreciate a detailed instruction on what and where I
should config.

Thanx.
 
/jonas



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