I'm trying to monitor all configured VPN connections in our Barracuda CloudGen Firewall. There are +100 of them, so it would be nice if things run as automatically as possible. Ideally would be, of course, a periodically scan of all configured vpn-connections, and adding or deleting them from PRTG, but manually adding or removing one at the time is acceptable.

Since PRTG doesn't contain any sensors for Barracuda products, I had to import the MIB manually and change the incorrectly created ovl lookup file, which resulted in showing 'down'-states as 'OK'. That is now solved.

I've come to the point where I can add all the VPN-state sensors in one action using the SNMP library feature. Before adding them, I can select which VPNs to add. At that point, the names are pretty clear, like: "vpn tunnels: IPSEC-OfficeAMS-192.168.99.0-..." but after adding them, the name of the sensor changes briefly in: "Table(vpn tunnels: IPSEC-Office...): [tablename] / [rowidentifier]". The tablename and rowidentifier make place for the full OID, which makes things pretty unclear.

I have played around with the Port Name Template under SNMP Compatibility Options, but whatever I use there, nothing changes when I add the next item. Am I overseeing something or is it simply not possible in this situation?

Version 18.4.48.1279+

Article Comments

Hi Bryan,

Thank you for your message.

While creating the sensor you're able to use the default [tablename] and [rowidentifier] placeholders or any other Table OID which has the same index as the entries from the current table. Please use an OID which uniquely identifies the interface, e.g. the OID which holds the name of the tunnels.

This is also explained in more detail in the following blog post (section "Creating the Sensor"):
What can I monitor with the snmp custom table sensor?

Does that help?

Kind regards,
Andreas Günther
Tech Support, Paessler AG


Jan, 2019 - Permalink