change ip address every 6 hours

[Yannick CHAMPS]

Our "legitimate" reason is : we want to charge subcribers for fixed ip
address service.
So others must have their ip addresses changed regularly.

Can I have some details about external scripting you mentioned earlier ?


Le 14/02/2012 21:38, Simon Hobson a écrit :
> Yannick CHAMPS wrote:
>
>> could you kindly share a sample of dhcpd.conf which changes randomly
>> subscribers ip addresses every 6 hours ?
>
> No, because it's not supported. It is expressly against the RFCs which
> require the server to try and give a client the same IP address each
> time it connects - subject to it not having been given to a different
> client since it last had a lease.
> Bear in mind that it breaks so many things. To start with, all
> sessions that a customer has open (perhaps a download that's got 5
> minutes left but has been running for 2 hours) will break. That alone
> is good enough reason not to do it.
>
> There are ways to "sort of" simulate this - but they all require
> external scripting to modify the config file periodically.
>
>
> Must admit, it's not come up for some time - the usual response is
> "check the archives, it comes up regularly - and no we won't help you
> break things that badly" (or something to that effect).
>
> Do you have a specific reason for needing to do this ? Other than a
> manager telling you that he needs customers to keep changing IP
> address to make it hard to run servers at home. Such an attempt is a
> waste of time - there are many dynamic DNS servers out there that will
> "fix" that problem.
>
> I think we only saw one legitimate reason in all the times this came
> up. All the rest were "my manager needs me to break the network and
> p**s off our customers". To the latter, the response is "go find
> another job, your customers will get p**ssed off and move to a decent
> ISP - and your's will go bust".
>