Comments on: ARD Update DNS Script

by: yamahito

Fri, 14 Oct 2011 12:33:18 +0000

Wow, a genuine comment not from a spam bot!

I was thinking of taking down this blog; perhaps if some of this stuff is actually still useful I should at least keep an archive up here…

I’m glad this came in handy, Zev.

by: Zev Eisenberg

Thu, 13 Oct 2011 15:01:59 +0000

Thank you! This solves a problem that I encounter a few times a day at work. I have a computer at home that I have set to connect to our VPN when it reboots. However, it gets a different IP each time. I’m using DynDNS to broadcast the VPN’s IP address (it’s a 10.x.x.x subnet IP), but ARD doesn’t pick up the change automatically. This fixes it perfectly.

by: Jared Amodt

Mon, 03 Oct 2011 19:20:15 +0000

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Mon, 05 Sep 2011 07:54:06 +0000

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by: yamahito

Thu, 03 Mar 2011 17:35:09 +0000

Evidently not

by: 偷情

Thu, 03 Mar 2011 16:37:33 +0000

Its great that you Shed light on a few things I didn’t understand. Thank you , hope you can keep writing blog?2

by: yamahito

Fri, 04 May 2007 12:11:20 +0000

Hm, it looks to me like that’s a private address range (which is why the server can’t find any DNS entries for your machines).

As SilentBob says, the script will only ever be as good as the value the command “host [username]” returns. It’s only a quick and dirty fix, though, so I think any error checking isn’t really worth the time it’ll take to put it in: you know when something goes wrong, and that’s good enough for me.

You’ll need to speak to your network manager to sort out whether or not your machines need/can have DNS names.

by: SilentBob

Fri, 04 May 2007 10:56:14 +0000

It appears that the script always expects a valid response, but if the reverse DNS lookup doesn’t resolve to a hostname it comes back with an error message, and the DNS name is updated to the 6th word (as the script uses cut with a delimiter of a space), which will presumably be the same for every host that doesn’t resolve.

Some error catching should be added to the script, such as checking that the response doesn’t contain the string (or words) “server can’t find” so that it only updates the entry if it’s valid.

It might not look pretty, but I don’t think it breaks anything.

by: carlo

Fri, 04 May 2007 10:27:42 +0000

Hi this is the nslookup of the IP

Carlo:~ carlo$ nslookup 10.70.65.50
Server: 10.70.64.90
Address: 10.70.64.90#53

** server can’t find 50.65.70.10.in-addr.arpa: NXDOMAIN

Many thanks!
Ciao

by: yamahito

Fri, 04 May 2007 09:26:58 +0000

Hi Carlo:

How does the domain that ARD shows compare with what you get when you do a reverse DNS lookup on the IP address?