[mrtg] Re: SMTP on TCP port

[Peter P. Benac]

Chris,

    I'd be more interested in what kind of errors you are having binding to
UDP port 161 and why you are trying to bind to port 161?  You don't need to
bind to port 161 unless you are writing an SNMP agent.  Furthermore Redhat's
SNMP agents will bind to this port during the startup process and this will
block any additional software from binding to that port.

    You need to do snmpget's and snmp writes TO port 161 on the devices you
are trying to manage.  This does not require you bind to any port on the
system you are running your SNMP software on.  To extract data from a device
all you need to do is open a socket with the DISTINATION port set to 161 and
not the SOURCE port. SNMP Agents don't really care what port sources the
request to it's port 161.

Regards,
Pete
----
Peter P. Benac, CCNA
Emacolet Networking Services, Inc
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> -----Original Message-----
> From: mrtg-bounce at list.ee.ethz.ch 
> [mailto:mrtg-bounce at list.ee.ethz.ch] On Behalf Of Chris Wilson
> Sent: Wednesday, November 26, 2003 6:03
> To: Vincent De Keyzer
> Cc: mrtg at list.ee.ethz.ch
> Subject: [mrtg] Re: SMTP on TCP port
> 
> 
> Hi,
> 
> I was having immence problem binding net-snmp to a udp port, it just 
> wouldn't go.  I tried evcerything I could think of, however it worked 
> first time on TCP (so it wasn't the config file!).
> 
> I could properly walk it etc.
> 
> Therefore I thought that if MRTG could access TCP ports then it would 
> mean that I didn't have to contine battleing against funny 
> things that 
> redhat has probably done to its system.
> 
> Cheers,
> 
> Chris
> 
> Vincent De Keyzer wrote:
> > Chris,
> > 
> > Afaik SNMP works on UDP only.
> > 
> > Why would you want to do this?
> > 
> > Vincent
 

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