Struggling to Get SNMP Working on Netgear DGN1000 Router

Where do you have PRTG set up? If you are forwarding the ports for SNMP to your computer, then if you are monitoring from outside the network, these requests would be being sent to the computer you described. When PRTG would request SNMP information, the requests would then be forwarded to the computer you specified and most likely this computer does not have SNMP enabled for a Bandwidth sensor.

If you are trying to monitor the router from the computer described, you should first check that SNMP is enabled on the device and set up correctly. The easiest way to do this would be to use the SNMP tester that we have. You can run it from the server running PRTG and see if you can read the up-time of the device. If you cannot, then something is not configured correctly with the Router.

You should also be able to query the router directly from a computer that is attached to the router and see the SNMP data.

Hi Greg, I have PRTG set up on the computer at the IP I listed - I am routing the SNMP information to this address. Your first paragraph reminded me to enable the SNMP service in Windows 7, which I have now done, but this has not fixed my issue.

I cannot connect to or read information from the router over SNMP using the tester application. Device IP is the router, at 192.168.0.1, and I am local IP 192.168.0.10. For now, I am using the default community string 'public'. But under both SNMP V1 and V2c, I receive the same error as in my original post.

I realise this now points to another element of my network, i.e. the router setup or how my PC is receiving the SNMP information, but do you have any ideas / troubleshooting steps? I followed the instructions provided to me by Netgear tech support, port/service routing and all.

- HateDread.

HateDread,

If your computer running PRTG at the .10 address is directly connected to the Netgear router, you shouldn't need any routing rules set up in the router. You would want PRTG to send the Get requests directly to the router. Try removing the routes or port forwarding from the router and see if that works. If not, try temporarily disabling the firewall to see if it's blocking the traffic still.

Also, I noticed in the manual that SNMP is by default disabled so you will need to enable that as well which looks like is done through a menu not normally available. Are you able to read SNMP data from any other device? You may want to check that the firewall on the computer has the firewall open to receive the data back from the router.