Greetings!
I've been using MRTG for years, in combination with PHP Weathermap to
monitor our infrastructure, and it works great!
But I've recently run into a bit of a snag with our firewalls, as I was
looking into automating weathermap configuration.
When I run cfgmaker on a firewall, it fails to connect the IP
information to the proper interface, instead generating configuration
like this:
### Interface 16 >> Descr: 'No-Description' | Name: 'No Name' | Ip:
'10.61.1.1' | Eth: 'No Ethernet Id' ###
### The following interface is commented out because:
### * got 'No counter exists for 16' from interface when trying to query
### * --ifref=name is not unique for this interface
#
# Target[wg-jessheim_16]: 16:...@wg-jessheim::60:5::2
# SetEnv[wg-jessheim_16]: MRTG_INT_IP="10.61.1.1"
MRTG_INT_DESCR="No-Description"
...
### Interface 131112 >> Descr: 'vlan40' | Name: 'vlan40' | Ip: 'No Ip' |
Eth: 'No Ethernet Id' ###
Target[wg-jessheim_vlan40]: #vlan40:...@wg-jessheim::60:5::2
noHC[wg-jessheim_vlan40]: yes
SetEnv[wg-jessheim_vlan40]: MRTG_INT_IP="No Ip" MRTG_INT_DESCR="vlan40"
I reported this to watchguard, but got this response:
In 12.0.1, changes were made to net-snmp to enable fixed OIDs for
interfaces.
> In previous versions, these values could change on reboot, which had
the potential to break SNMP polling of specific interfaces.
> After this change, the OIDs of specific interfaces start at 65536.
For example, getting link speed on eth0 would use OID
1.3.6.1.2.1.2.2.1.5.65536.
>
> The cfgmaker script appears to make some assumptions about how these
OID values are mapped
> and it seems to try using information returned by OID
1.3.6.1.2.1.2.2.1.1 (ifindex) to generate specific queries for each
interface.
> The problem with this is that these values do not map to the same
values used in the fixed OIDs,
> and causes cfgmaker to fail when retrieving some of the data for the
interfaces.
> The only real solutions here would be to either create a custom
script to properly parse data returned by snmpwalk
> when querying the Firebox and generate an MRTG configuration file
based on it or modify the cfgmaker script to do this.
I would prefer to not run my own custom version of cfgmaker, so was
wondering if this might get fixed upstream somehow?
--
Cheers, Morten
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