DNS client update IP thru cron or other?

Discussion in 'Server Operation' started by domino, Aug 17, 2005.

  1. domino

    domino New Member

    I've search here and didn't find any hit that pertains to my question. So i'm sorry if this has been covered. I know this should be posted in the proper site, but I figured this post can be useful to other n00bs like myself.

    How do I add the fallowing to cron every 15min?

    Code:
    wget -O - --http-user=username --http-passwd=password "https://dynamic.zoneedit.com/auth/dynamic.html?host=domain.com" 
    I have webmin installed and I am in the cron section. I'm guessing I paste the code above in the "Input to command" box. But what do I type in the "Command" box? Should I run this job as root? What if I need to update 3 other domains? Do I create 3 other cron jobs?

    Can anyone recomend a n00b friendly DNS client with gui? What about ez-ipupdate? I have the RPM version for RedHat, but will it work properly with Fedora?

    Greets!
     
  2. falko

    falko Super Moderator

    You can run

    Code:
    crontab -e
    to edit your cronjobs. There you enter

    Code:
    */15 * * * * wget -O - --http-user=username --http-passwd=password "https://dynamic.zoneedit.com/auth/dynamic.html?host=domain.com"
    and save the file.

    Code:
    Should I run this job as root?
    At least you won't have any permissions problem then... :p If you know the cron job is working and doesn't destroy anything, then you can run it as root.

    Yes.
     
  3. till

    till Super Moderator

    I would solve it like this:

    1) Write a small shell script that contains the code for the zoneupdates, lets call it zoneupdate.sh, we store it for example in the /root folder.

    Contents of /root/zoneupdate.sh

    Code:
    #!/bin/bash
    
    wget -O - --http-user=username --http-passwd=password "https://dynamic.zoneedit.com/auth/dynamic.html?host=domain.com"
    In this shellscript you can add a line for each domain.

    To make the script executable, run this comand:

    Code:
    chmod +x /root/zoneupdate.sh
    Now we add the cronjob. Run this command on the shell as root user to open the root crontab in an editor:

    Code:
    crontab -e
    Then we insert this line at the end and save the file:

    Code:
    0,15,30,45 * * * * /root/zoneupdate.sh &> /dev/null
    (This is untested and may contain errors :D )
     
  4. domino

    domino New Member

    Hmm, I had wanted to do the cron job at first. Then I read about the script but couldn't understand it until till explained it. Since I will be adding 5 of my own domains, and a handfull of hosted subdomains from dynDNS, I think the script will be the best way to go. As long as there are no errors :p. Will post back the results.

    Thank you both!!
     
  5. domino

    domino New Member

    Ok, I read that running a cron job for 10 domains every 15min. on the same DNS server was not a very nice thing to do to a free DNS service, so no cron :(. I tried the script that till mentioned and when I tried to run the script manually, the script froze :(.

    I looked and search for half the day. Then finally ran accross ddclient-3.6.6. It says anyone with brains can run and install it, so I guess I must lack brains because it took me another 4hrs to get it installed and running. Well, I think I have it running as I don't know if my ISP changed my IP the last 24hrs. I will now in the next 2 days though.
     
  6. domino

    domino New Member

    I feel like kicking myself in the ass for not thinking about this. I guees the exicement of running everything in linux caught me offgaurd. Anyway sorry for making this my personal blog thread :p. So here it goes.

    I ran win/apache + DynSite client before I installed VMWare and Fedora as a guest OS. I removed apache for win32 but kept DynSite installed. When trying to clean the system and deciding whether or not to remove DynSite, it suddenly occured to me that I can still use DynSite to update my IP! Since Fedora and Widnows + DynSite are on the same network, the AP/Router will take care of the site requests.

    So there it is! A newbie guide to updating your Dynamic IP. If you have a windows unit set up on your network, installing a DNS client on it will reduce the headaches. I would like to add that linux has 1 less thing to run every 3 minutes. :cool:
     

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