DSM-G600, DNS-3xx and NSA-220 Hack Forum

wenzlerpaul wrote:

Hi,

DNS-323 as we know is equipped with its own ddns to update certain Dynamic DNS services, however, the panel did not include ZoneEdit.com which is what I was using to update a domain with my dynamic ip address.  Because of this, I created my own little script to make that auto-update for me.

Note:
crontab was not working for me.  I tried everything I could find in this forum and other site on adding a custom cron job through a script (editcron.sh for example) but the system drops my entry after few minutes when i check through crontab -l .  It appears correctly upon reboot and after few minutes it disappears, not sure why.

If you can use crontab for this purpose, you might as well use it because it is a better option.

ZoneEdit is the only service I liked that allows you to add a FQDN (domain name) and update the dynamic ip address painlessly.  I know that there are some other service that does this but this one is for ZoneEdit purpose only.

If you do not have an account with ZoneEdit, you can signup for a free account and follow the tutorial in this link http://www.4webhelp.net/tutorials/misc/zoneedit.php

Note:
On ZoneEdit, you will need to add www.domain.com and domain.com so both will resolve to your box correctly, you can add a temporary ip just to setup your domain/s

Once you have your ZoneEdit account ready and your domain name pointed to ZoneEdit dns, you can do the steps below in your DNS-323/343 box:

cd /mnt/HD_a2/ffp/start
vi zoneeditip.sh

type in or paste the following code without the asterisks:
***************************************************
#!/ffp/bin/sh

wget -qO - 'http://zoneeditusername:zoneeditpass@dynamic.zoneedit.com/auth/dynamic.html?host=www.domain.com,domain.com'


at NOW + 5 minutes < /mnt/HD_a2/ffp/start/zoneeditip.sh
***************************************************

press ESC then type :wq then enter to save and exit

to make it executable:
chmod a+x /mnt/HD_a2/ffp/start/zoneeditip.sh

To start the update:
/mnt/HD_a2/ffp/start/zoneeditip.sh

to check if the "at" has a scheduled job running:
atq

to kill a scheduled job:
cd /var/spool/at
ls
rm jobnumber (where jobnumber looks like this a00087013d90f4)


I used the code above because of my crontab problem.

On ZoneEdit, the suggested wget command was
wget -O - --http-user=username --http-passwd=password 'http://dynamic.zoneedit.com/auth/dynamic.html?host=www.mydomain.com'

However, the wget version of busybox does not have all the options added so this will cause an error of "unknown options"

refer to: http://www.zoneedit.com/doc/dynamic.html
also, the reason why I am updating both host www.domain.com and domain.com is that it somehow fails time to time to update both entries, so I just opted to update both.

You can also adjust the time on your at command, please refer to my other post regarding this matter: http://dns323.kood.org/forum/viewtopic.php?id=4720

Hope this helps,
Paul

Looks good dude!  I use zonedit as I could not find a provider that permits custom domains bought elsewhere to be used for free!
My router has an issue with DDNS, and as you know, the DNS323 restricts updates to certain services.

I have no idea about the crontab issue, but seen similar complaints - I dont have time to investigate, so will use something that works!

One question I have: does the command "at NOW +5 blah.." run the update & then creates a job for 10 minutes?
If so, does it not loop and create many jobs? I guess I'm just not understanding how the command to create a job of itself will self-sustain without issue.  I assume its ok, but just checking!

Cheers

ok scratch the last question - I addeed a ">> logfilepath/logfilename" to the end of the zoneedit mget command and it seems to work a treat
I'll worry about the file size and i/o overhead if I don't find a better solution within the next few months!