[mrtg] Re: no SNMP Response

Alex van den Bogaerdt alex at slot.hollandcasino.nl
Thu Apr 4 23:04:55 MEST 2002

yuriy wrote:

> Roth,

I think she prefers to be called Gabrielle :)

> -with snmp everything is ok

What do you mean?  You can query the box using SNMP yet you
cannot query it using MRTG?  Or do you mean that local SNMP
access is OK and it is just your site having problems?

> -community I can change myself because I have access through telnet
> -there is no access lists to snmp on this box

Great.  Do define an access list, accepting packets from your site and
then accepting everything else.  Then show the statistics for this
access list and see if you receive packets on this router.

It doesn't provide a solution but it does help you troubleshoot the

>  What is interesting about their firewall: how can I check this from my
> side?

You can telnet so a routing problem is not likely.  That leaves
the snmp protocol related stuff.

If the access list shows that packets do come in, yet you do not see
the replies, chances are that the firewall is blocking the replies.

If you do not see snmp packets going in to the router, the firewall
might block incoming traffic.

There may be other problems; I guess what I tried to say to you is to
break down the problem into smaller portions.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
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