[Nagiosplug-devel] feature request - selecting yournetwork interface

[Thomas Guyot-Sionnest]

I don't agree. I suggested this feature for check_ping some time ago but it
was dismissed because it was ping-version-dependant. It's even better to
implement it with check_tcp but I don't have the knowledge to modify
check_tcp for that.

The idea is in that in complex & secure setups, your hosts are connected to
different vlans depending on what they do. When you changes the firewall
rules to allow or remove accesses it's allways possible that you make a
mistake and have some service blocked for some hosts.

Using Linux VLAN support I'd like to be able to have one IP per VLAN and
check all interconectivity between vlans and other sites. So for example I
may want to know if hosts in the .7 vlan can connect to the mail server in
the .4 vlan, but since I have an IP in the .4 vlan already it won't go
trough the firewall. So I must specify to sent it from the .7 vlan.

Thomas

> -----Original Message-----
> From: nagiosplug-devel-bounces at lists.sourceforge.net 
> [mailto:nagiosplug-devel-bounces at lists.sourceforge.net] On 
> Behalf Of Andreas Ericsson
> Sent: September 29, 2006 4:44
> To: Nagios Plugin Development Mailing List
> Subject: Re: [Nagiosplug-devel] feature request - selecting 
> yournetwork interface
> 
> garrett honeycutt wrote:
> > The ability to select which interface plugins use, specifically
> > check_tcp, would be ideal. Machines that have multiple interfaces or
> > multiple IP's bound to the same interface, ie: eth0:1, 
> eth0:2, etc could
> > take advantage of this. 
> > 
> > I have an application that sends data out on different 
> interfaces and
> > since I cannot replicate that behavior with the plugins, 
> they fail. Any
> > ideas, suggestions, or code would be beneficial.
> > 
> 
> This would only make sense if you have more than one IP-address 
> connecting to the same subnet, or if some of your interfaces 
> share the 
> same routing rules (so that it's completely arbitrary which 
> interface is 
> used to reach a particular network). All the above cases are 
> situations 
> where multiple interfaces doesn't really make sense.
> 
> If you post your routing rules and interface setup I might be able to 
> help you sort this out. Either way, it should be fixable 
> without surgery.
> 
> -- 
> Andreas Ericsson                   andreas.ericsson at op5.se
> OP5 AB                             www.op5.se
> Tel: +46 8-230225                  Fax: +46 8-230231
> 
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