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Application that emails you upon External IP change
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Fresh-Faced Recruit
Join Date: Jul 2006
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I have an iMac G5 running OS X Server 10.5.6 in a standard configuration. I also have an ISP that supplies a dynamic IP. Although the IP has not changed in a while I would like to know if it does.
I see that there was a program called WIMP that did this but does not see to be developed anymore... I did happen to track it down but it didn't seem to work for me.
Anyone know of an application that does this.
Thanks.
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Moderator  Join Date: May 2001
Location: Hilbert space
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Why don't you use dyndns instead? This way, you don't have to remember your IP at all. And if you want to know the IP, all you need to do is lookup the IP of [myname].dyndns.org.
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I don't suffer from insanity, I enjoy every minute of it.
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Fresh-Faced Recruit
Join Date: Jul 2006
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I though that was a pay service?... Is it free - I was trying to do this on the cheap with even without the easiness factor... but if this works that would great!
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Moderator Join Date: May 2001
Location: Hilbert space
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The basic dyndns is free. They offer extra services for money, but the service I describe exists for many, many years and has always been free. Every modern router I have used has an option to access dyndns. (Your router needs to send the new IP to the dyndns server if it is changed.)
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I don't suffer from insanity, I enjoy every minute of it.
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Fresh-Faced Recruit
Join Date: Jul 2006
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I will et an account then. Thanks for the tip... I just want to run an FTP server from my machine and need a domain that will update with the IP change when it occurs.
I have a DLink DIR-655 - just need to find some instructions on how to set this up now.
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Moderator Join Date: May 2001
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Don't use ftp over the internet! Activate Remote Login in the Sharing panel of the System Preferences. If you want to download something, then use sftp://mycomputer.dyndns.org instead of ftp://. sftp looks like ftp, but it is encrypted. ftp sends username and password in clear text, so people could listen in and hack your computer.
With ssh (which is the daemon you activate), you can also forward traffic, it's a cheap man's vpn. I have access to my parent's screen this way (I've activated screen sharing) so I can help if they have a problem and I happen to be on another continent. Ditto for file sharing.
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I don't suffer from insanity, I enjoy every minute of it.
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Clinically Insane
Join Date: Oct 2000
Location: Los Angeles
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Can you use the built-in OS X screen sharing through SSH?
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"The natural progress of things is for liberty to yield and government to gain ground." TJ
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Moderator Join Date: May 2001
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Yes, I do it regularly to update my parents' Mac mini.
You have to set up an ssh tunnel which takes about two minutes and login via Terminal before you try to connect (although you could write a primitive Apple Script that executes said Terminal command for you). I can give you instructions if you're interested.
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I don't suffer from insanity, I enjoy every minute of it.
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Moderator  Join Date: Oct 2001
Location: San Jose, CA
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Originally Posted by OreoCookie 
Every modern router I have used has an option to access dyndns. (Your router needs to send the new IP to the dyndns server if it is changed.)
Except Apple's routers! Grrrr...
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Moderator Join Date: May 2001
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Fortunately there is a tool for OS X that makes everything work. Basically it does what your router usually does: checks whether your IP has changed in regular intervals and then sends a message to dyndns to update your IP.
To be honest, I didn't know about this until today. Even the very first dsl router I've had was able to do this, no idea why Apple has made such a glaring omission. I just bought my Airport Express base station for the sound output 
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I don't suffer from insanity, I enjoy every minute of it.
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Moderator Join Date: Oct 2001
Location: San Jose, CA
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That is a good solution that I had not noticed, but it does require always having a Mac running the app on your LAN. When I travel, the only network machine behind my router is my hacked series 1 DirecTivo, and I have no idea if the Linux tool available at dyndns will work with it.
Steve
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Celebrating 10 years and 4000 posts on MacNN!
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Fresh-Faced Recruit
Join Date: Jul 2006
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So what is this app for osx that will tell dyndns when my IP changes? I am not going to use FTP over the net... well I am but I am going to use Rumpus for its web ftp function...
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Moderator Join Date: Oct 2001
Location: San Jose, CA
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Celebrating 10 years and 4000 posts on MacNN!
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Moderator Join Date: May 2001
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Originally Posted by jderosa3
So what is this app for osx that will tell dyndns when my IP changes? I am not going to use FTP over the net... well I am but I am going to use Rumpus for its web ftp function...
As I said, pretty much any router can do this without additional software. Follow the instructions on page 55 of your router's manual. It's always, always better to let the router do it if possible.
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I don't suffer from insanity, I enjoy every minute of it.
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Fresh-Faced Recruit
Join Date: Jul 2006
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