Re: DHClient Exit Scripts

[Hal Vaughan <hal@halblog.com>]

On Aug 15, 2010, at 6:37 PM, Boyd Stephen Smith Jr. wrote:

> In <[🔎] 1AF890A5-5BF9-46C9-8C4B-B709170DD545@halblog.com>, Hal Vaughan wrote:
>> I've been reading the man pages for dhclient, but I'm stuck with one key
>> question I've missed.
>> 
>> I have an exit script set up to notify me of the IP address of a particular
>> system (on a LAN) whenever the IP address changes.
>> 
>> I know whenever dhclient runs, it runs the exit scripts.  The one issue I'm
>> not clear of is whether the exit scripts will be run any time the IP
>> address changes, like when a lease expires.  I know it'll run at reboot or
>> if networking is restarted, but will the exit scripts be run when the IP
>> address is changed by the DHCP?  If it's not, is there any program that
>> runs under those conditions?
> 
> I can't answer the specific question, but I knows that there are DynDNS 
> clients in Debian that are capable of notifying a remote system whenever the 
> local system's IP changes.  One of these clients should be able to "speak" a 
> "dialect" you can process.

I had always thought those were for external IP addresses, not for inside a LAN.  I'll check on that.

Thanks!



Hal