No Such Object available on this agent at this OID

[ozbahceliler]

Hello,

I'm trying to set SNMP up for our pfsense. I have watched the "Monitoring pfSense 2.4 with SNMP" video which helped me to set things up on pfsense side.

However, I'm having trouble getting data from snmp, I can't match things with the video correctly. There's no information on the video about the steps below, I couldn't find a document explaining what needs to be done, so what I did was guesswork.

1. I have downloaded mibs from both:

http://files.pfsense.org/jimp/mibs/
http://files.pfsense.org/misc/mibs/

2. /jimp/mibs/ is from 2015 so I've moved those into other one and overwritten the old ones.
3. Removed .txt from the files.
4. Moved all files
5. Edited the /etc/snmp/snmp.conf , it looks like that at the moment:

mibs +ALL
mibdirs +/var/lib/snmp/mibs/iana:/var/lib/snmp/mibs/ietf:/var/lib/snmp/mibs/pfsense

5. Running the following command:

snmpget -On -M +/var/lib/snmp/mibs/pfsense -v2c -c public 10.1.1.1 BEGEMOT-PF-MIB::pfStatusRunning.0

6. This command returns:

.1.3.6.1.4.1.12325.1.200.1.1.1.0 = No Such Object available on this agent at this OID

when I do snmpwalk like that:

snmpwalk -v2c -c public 10.1.1.1

I receive a long list of items, last part is like:

SCTP-MIB::sctpInSCTPPacks.0 = Counter64: 0
SCTP-MIB::sctpDiscontinuityTime.0 = Timeticks: (0) 0:00:00.00
SCTP-MIB::sctpRtoAlgorithm.0 = INTEGER: 0
SCTP-MIB::sctpRtoMin.0 = Gauge32: 0 milliseconds
SCTP-MIB::sctpRtoMax.0 = Gauge32: 0 milliseconds
SCTP-MIB::sctpRtoInitial.0 = Gauge32: 0 milliseconds
SCTP-MIB::sctpMaxAssocs.0 = INTEGER: 0
SCTP-MIB::sctpValCookieLife.0 = Gauge32: 0 milliseconds
SCTP-MIB::sctpMaxInitRetr.0 = Gauge32: 0

Can anyone please advise, I have no idea what I'm doing, I can't really troubleshoot something I can't quite understand.

[jimp]

Are you using the built-in SNMP (bsnmpd) or the NET-SNMP add-on package?

The NET-SNMP package wouldn't have the PF data available, so those MIBs won't be relevant.

Also the most current copies of the MIBs are on your firewall already under /usr/share/snmp/mibs/ and /usr/local/share/snmp/mibs/

[ozbahceliler]

@jimp

Hello,

Thank you for your reply. I'm using NET-SNMP. I couldn't get BEGEMOT-PF-MIB::pfStatusRunning.0 to work, although I managed to get all other stuff (CPU, MEM, State table size) work.

Thank you.

[jimp]

That MIB won't work because you are using NET-SNMP. The PF MIBs only work with bsnmpd, but bsnmpd doesn't have all the features and robustness of NET-SNMP.

[ozbahceliler]

@jimp

Thank you for the information, state table size is important to us so this is why I decided using NET-SNMP over the other one, which works great. Only it was a little pain to set up on the datadog side.

All resolved :)

[jimp]

You can use custom commands in NET-SNMP to get that info if you decide to switch back.

While you can't drop this into NET-SNMP directly, you could use a command like this on a custom exec to poll it remotely:

pfctl -si | grep -A1 'State Table' | tail -1 | awk '{print $3;}'