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Dynamic DNS

cdean040797
cdean040797 asked
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Last Modified: 2010-03-18
I am curious about dynamic DNS.  There are 2 sites I can refernce to http://dns.nws.net and www.dyndns.com  I like the way NWS is setup and how simple it is.  I want to know where I can get the code or know how to do the Dynamic DNS serving on my Linux box.  I was told the code and information was free, but no one wants to give me the information.  I want to pop it in and get it up and running on a friennds machine.  Can you please help me???

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The code is available on those sites.

Sometimes sales people makes things seems more rosy than they are.

Let me try to explain.
The client side is easy. You send a message to this site, and thats it.
The server side is a bit more complicated:
The customer must have an account at the server. The owner of the server owns a domain name. Lets say olsen.com.
Your account could be northwind. So the domain name you would "buy" as your dynamic address would be northwind.olsen.com.
Now what happenes when you log in is that olsen.com modifies his nameserver to reflect your address.
To do so he must:
1) modify his hosts table and (optional) his reverse table.
2) modify his SOA serial number
3) reload the nameserver.
The time to live must be very small, and no secondary nameservers must be involved, since they would contain incorrect data for some time, making connection impossible.

So if you want to do that, all you need is:
- a real live connection and a domain name.
- no secondary nameservers.
- scripts (I would use email) to inject the client number.
- scripts to update the nameserver forward file and
- script to reload the nameserver.
Not very complicated, but very expensive.
If you don't have a free live netconnection that is.

There is another problem though.
I am the domain responsible for a few domains. If somebody in our organisation would like to do that, I can tell you they would face a "mission very impossible". To put it simple - nobody gets near my nameservers. If they upload bogous data to the other nameservices, my mailbox will be instantly full. All 2.1GB

Not to scare you off - but you could become a very unpopular person.

Sincerely yours
Karsten Jeppesen <kj@yarc.com, northwind@earthlink.net>

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