NET-SNMP Firewall Ports

Hi,

 

I require clarification on the ports required to be opened for NET-SNMP
to work.

 

I know that UDP 161 is required, but I have been unable to confirm if
this needs to be opened as a 2 way rule as shown below:

 

Source                         Destination                  Port

Monitoring Server           Monitored Server            UDP 161

Monitored Server            Monitoring Server           UDP 161

 

 

Or a 1 way rule as shown below:

 

Source                         Destination                  Port

Monitoring Server           Monitored Server            UDP 161

 

I have checked the FAQ and archived messages and have been unable to
find this information. I managed to find the following info (Link
<http://www.net-snmp.org/wiki/index.php/FAQ:General_18> ), but it
doesn't quite clarify the question for me:

 

What ports does SNMP use? 

There are three main network ports (and one named socket), which are
typically used by SNMP. These are: 

    UDP port 161       - SNMP requests (GET* and SET)

    UDP port 162       - SNMP notifications  (Traps/Informs)

    TCP port 705       - AgentX

    /var/agentx/master - AgentX

 

We don't use SNMP Traps and I am not aware of what AgentX is, we use
Solarwinds as our monitoring server and NET-SNMP as the SNMPv3 agent for
all servers within our DMZ.

 

Regards

 

Kevin Evans            

Systems Administrator

ICT Unit

7 Camberwell Way

Doxford Park

Sunderland

SR3 3XN

 

Tel: 0191 561 4244

mailto:[email protected]
<mailto:[email protected]> 

 

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