Check a device for SNMP

Posted on 2011-04-22
Last Modified: 2012-05-11
Hello, I'm trying to setup a remote device with MRTG 2.17.1 for bandwidth monitoring, I have setup my local gateway already.  However, I first want to make sure that I'm able to poll the device with SNMP, which uses UDP port 161. I'm not able to ping the device currently ICMP packets are being blocked.

My question, is there a way to verify whether I'm able to poll the device with SNMP? Do I need to have ICMP filtering turn off for SNMP polling to work?

Any help or suggestions would be appreciated.
Question by:vrosas_03

    Author Comment

    Oh, forgot to mention that I'm running Windows Server 2003 / Windows XP SP3.

    Thank you.
    LVL 11

    Assisted Solution

    telnet 161
    If it connects the port is open and snmp is listening
    LVL 57

    Accepted Solution

    Well the telnet trick only works if it is listening on TCP port 161, which normally SNMP will not do.

    I would just use cfgmaker to configure it for MRTG.  If it listening on UDP 161 and you know what the community string is, it will work.  If not it will not work.

    Do you have admin access to the device?  If so, see if it is configured to allow SNMP queries and what the community string is.

    LVL 21

    Assisted Solution

    You might be able to see what is going on if you do a packet capture with Wireshark or something while testing it if you want to go to that level.
    LVL 3

    Assisted Solution

    Your SNMP software will give you a connection OK or NOT OK status.

    Author Closing Comment


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