GET script DDNS

[benganb]

Hi, I need to update domain with my dynamic IP. The build in ddns support do not cover my Swedish dns provider loopia.

Is there a way to run a scrip every hour according to this specification?
I have a n66u with fork

https://support.loopia.com/wiki/About_the_DynDNS_support


The following is an example of a permitted GET request to Loopia:

GET /XDynDNSServer/XDynDNS.php?
system=custom&
hostname=myhost.com&
myip=11.22.33.44&
backmx=YES
HTTP/1.0
Host: dns.loopia.se
Authorization: Basic usernameassword
User-Agent: myclient/1.0 me@null.net

 

[RMerlin]

Use "wget" through a cron job. See the Wiki for info on user scripts and Cron usage.

However, note that contacting that server every hour might be considered abusive usage by the DDNS provider, and they might end up blocking you.

 

[benganb]

Thanks Merlin!
When I search the wiki, I get many many examples....
https://github.com/RMerl/asuswrt-merlin/search?p=2&q=wget&type=Code&utf8=✓

Can anyone guide me?

Whats the appropriate frequency for update ip? Or is there a way to script update only when the router have a new ip?

 

[Martineau]

Thanks Merlin!
When I search the wiki, I get many many examples....
https://github.com/RMerl/asuswrt-merlin/search?p=2&q=wget&type=Code&utf8=✓

Can anyone guide me?

Whats the appropriate frequency for update ip? Or is there a way to script update only when the router have a new ip?

In wan-start (depending on the Primary or secondary parm) I save the WAN IP address to my persistent USB drive if init-start was run.

MY_WANIPADDR=$(nvram get wan0_ipaddr)

MYROUTER=$(nvram get computer_name)

# Save the current WAN I/P address
echo $MY_WANIPADDR >/tmp/mnt/$MYROUTER/IPADDR.txt

then invoke my email script....


and my email script contains logic to retrieve the previous saved WAN IP address and checks to see if it has changed...

MY_WANIPADDR=$(nvram get wan0_ipaddr)
MYROUTER=$(nvram get computer_name)
MY_WANIPADDRX=$(cat /tmp/mnt/$MYROUTER/IPADDR.txt)


if [ "$MY_WANIPADDR" = "$MY_WANIPADDRX" ]; then
   logger -t "($(basename $0))" $$ WAN IP unchanged
else
   echo "My new "$ISP" IP address is: >"$MY_WANIPADDR"< was >"$MY_WANIPADDRX"<" >>$TEMPFILE
   echo $MY_WANIPADDR >/tmp/mnt/$MYROUTER/IPADDR.txt
   logger -t "($(basename $0))" $$ WAN IP changed!!!
fi

Regards,