Script to detect dynamic ip change and update to config file

Shell Programming and Scripting
1

Hi All,

I am newbie here and request your assistance.

I have a service running on public ip, but since I have a dynamic IP it keeps on changing and every time I need to manually get the new ip and add to the config file and restart the service. This has become bit time consuming.

Hence, I am looking for a script that can do the following action.

Detect IP address in ppp0 whenever it changes -> capture the new IP address and update that to my config file and save -> Restart my service.

Thanking you.
Regards
Shaan

2

What operating system/distribution? It'd be preferred to put it in your ppp-up script, or ifup scripts if available.

3

CentOS 5.5

Thank you.
Shaan

4

Aside from how to invoke it, does the service config really needed changed? Could you possibly listen to 0.0.0.0 and just restart the service?

I don't deal with CentOS but I believe it has an ifup-local script. You could possibly just put service xxx restart in there.

To give details to modify the config file we'd have to know how it looks

5

Here's the config file. Wherever "PublicIP" appears, I need the ppp0 ip to be updated and save the file. I already have a "Start Service" and "Stop Service" script ready. So only difficulty is how to grab public ip from ppp0 whenever it changes and add that to the place of "PublicIP"

webproxy -l PublicIP -s local:127.0.0.1:7722 -F -L 501 -m 19001 -M 21000 -P PublicIP -B
Setstart -E -n 1 -l PublicIP -l 127.0.0.1 -W PublicIP

---------- Post updated 12-27-12 at 11:22 PM ---------- Previous update was 12-26-12 at 11:28 PM ----------

Any positive feedback from experts..