CentOS - Oct 2009 - Monitoring OpenVPN TUNs with MRTG

I want to check some client OpenVPN TUN interfaces with MRTG running at my
VPN server, so I have to specify their OID interface numbers in mrtg.cfg.
The problem is, these numbers are dynamic, as they may change whenever
OpenVPN restarts for any reason... so, how can I write stanzas such as

Target[somehostvpninterface] : ifInOctets.X&ifOutOctets.X:public@
<SOMEHOST.IP>

without wiring up the X interface number into cfg file? Or, is there any
method to keep X from changing at the clients?
Any hints appreciated!
-- 
Eduardo Grosclaude
Universidad Nacional del Comahue
Neuquen, Argentina
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On Oct 3, 2009, at 10:32 AM, Eduardo Grosclaude wrote:
> I want to check some client OpenVPN TUN interfaces with MRTG running  
> at my VPN server, so I have to specify their OID interface numbers  
> in mrtg.cfg.
> The problem is, these numbers are dynamic, as they may change  
> whenever OpenVPN restarts for any reason... so, how can I write  
> stanzas such as
>
> Target[somehostvpninterface] :  
> ifInOctets.X&ifOutOctets.X:public@<SOMEHOST.IP>
>
> without wiring up the X interface number into cfg file? Or, is there  
> any method to keep X from changing at the clients?
> Any hints appreciated!
You can take a look at ifrename(8).

Giovanni P. Tirloni
tirloni at gmail.com




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