Custom Script for StrongDNS Ip Update on Reboot

[Lee Banwell]

I use a DNS service that requires me to update my IP address every time my router reboots and I get assigned a new IP.

I am given a specific identifier in the format of -

"https://strongdns.com/ipupdater/***Unique Key***"

Now I can do this manually.. but would like to add a custom command to the startup of the router everytime my ISP resets my connection (approx every 3 days). StrongDNS themselves document the command that can be used for DD-WRT routers.

I've also read through https://github.com/RMerl/asuswrt-merlin/wiki/Custom-DDNS but I am still unsure how to proceed? I see the wget -q0 - "Http*** command being used but i am not sure if I can just substitute in the simple command from my DNS service. I note also that he DD-wrt instruction mark the script as Cron?

I've installed both Putty, Notepad ++ and WinSCP but I am unsure how to turn all that into a custom script for my router to run every time my connection get reconfigure due to router reboot or ISP renewal.

I am hoping it would as simple as loading a custom script into the Jffs area of the router?

Any help greatly appreciated.

 

[Lee Banwell]

Anyone?

 

[SpaceDog]

Anyone?

Login to your router via SSH (enable SSH at Administration > System).

Create a file /jffs/script/ddns-start that contains this:

#!/bin/sh

curl -s -k "https://strongdns.com/ipupdater/PASTE_YOUR_KEY_HERE" >/dev/null

if [ $? -eq 0 ]; then
/sbin/ddns_custom_updated 1
else
/sbin/ddns_custom_updated 0
fi

Make sure JFFS custom scripts are enabled (Administration > System).

That's it.

 

[Lee Banwell]

Yeah got something like the above working but it was continually updating my IP address to StrongDNS every 30 secs or so. Also had to enable the script by switching on Custom DDNS in router setup.

In the end I've settled on a wan-start script instead.

#!/bin/sh
logger -t $(basename $0) "Start"
sleep 10
curl -s -k "https://strongdns.com/ipupdater/MY KEY HERE"
logger -t $(basename $0) "End"

Seems to be working.