Re: listening address format

On 18 January 2011 21:42, Barry Leggett <[email protected]> wrote:
> The listening address format is defined as [transport:]hostname[:port] or
> [transport:]IPv4-address[:port] on the web page
> (http://www.net-snmp.org/docs/man/snmpd.html) and
> [transport:]port[@interface/address],... within snmpd.conf, but neither of
> these seem to work. What is the correct format if you want to specify the ip
> address (or address range) and port for each user.

What do you mean by an "address .. for each user" ?

The listening address is concerned with the agent as a whole,
not with individual users.

For example, if the system has three network interfaces:
   10.0.0.1,    172.16.0.1    and    192.168.0.1
then by default, the agent will listen on all three (plus the loopback address)
But if you start the agent using

      snmpd  udp:10.0.0.1

then it will *only* listen for connections on this interface
(and not on the other two, or on loopback)



> I have found that specifying ports only does work (eg 1032. 161) but I want
> to restrict the use of a particular port to only certain addresses or range
> of addresses.

If you want to restrict the *remote* addresses that can connect to
the agent, then this probably isn't the correct approach.

Have a look at the tcp-wrappers configuration (typically hosts.allow)
instead.

Dave

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