Identify External IP address

I have some systems with which I need to identify (preferably through
a perl script) the IP address that external traffic is going out on.

Each system has 3 nics and eth2 is connected to the internet. SOME of
them use PPPoE, some are DHCP and some are static. On the PPPoE
systems, the ip I need is associated with ppp0, not eth2.

I am thinking a crossref of 'ifconfig |grep inet' and 'route -n|grep
^0.0.0.0' will work, but I am hoping there is a simpler way.

Any help is appreciated. Thanks in advance.

Brian Andrus
batman (at) thundermail com

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Hi Brian

> I have some systems with which I need to identify (preferably through
> a perl script) the IP address that external traffic is going out on.

I have had the same problem and found an easy way to figure out my
dynamically changing ip adress.

Just open the following site: http://checkip.dyndns.org

mfg
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Brian Andrus wrote:
> I have some systems with which I need to identify (preferably through
> a perl script) the IP address that external traffic is going out on.
>
> Each system has 3 nics and eth2 is connected to the internet. SOME of
> them use PPPoE, some are DHCP and some are static. On the PPPoE
> systems, the ip I need is associated with ppp0, not eth2.

With pppd, You can use the ip-up script. It will be called with the
IP as one of its arguments upon connecting.


Cheers, Jack.

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My personal reading of the string "MicroSoft" expands to "NanoWeak"...