IP address changing?

thepharcyde

thepharcyde

thepharcyde

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Joined
17 Mar 2004
Posts
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Is it normal that everytime I disconnect from the internet/reboot my router that my IP address changes?

I am with Tiscali.

Just done it three times in a row and different everytime

79.64.76.225
79.64.125.135
79.64.59.215
 
With Tiscali you don't get a static address. It changes everytime. This is called a dynamic IP address.
 
thepharcyde said:
Oh I did not know this. Whats the difference, how come they do this?
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With some Internet providors you get static IP's but most home users don't need static addresses. Sometimes you have to pay for them. They are only good in a server environment or you run some sort of constant Internet service like email/web sites e.t.c.
 
wannabedamned said:
If you require a Static IP address, You can usually contact your provider and request one. But it does cost.
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Not all ISPs allow this. All the big main companies don't. I am on sky and they don't provide them. Dynamic is fine for most users anyway.
 
andr3w1984 said:
Not all ISPs allow this. All the big main companies don't. I am on sky and they don't provide them. Dynamic is fine for most users anyway.
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Nah do not need one was a bit miffed as I thought you were assigned your own etc for security reasons. So I potentially get assigned one which someone else has been assigned in the past?
 
thepharcyde said:
Nah do not need one was a bit miffed as I thought you were assigned your own etc for security reasons. So I potentially get assigned one which someone else has been assigned in the past?
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Yes, You have an Lease Obtained/Lease Expires date and once you reboot your router/modem or you loose connection it automatically renews the address. Sometimes you will get the same one sometimes you won't.

Yes, you could indeed get one that someone has had in the past.
 
Certain situations permit the need for static addressing such as running an email server on your internal network, your external domain requires that your MX (Mail Exchanger) record points to your external public ip address, if this were to change periodically it would cause interruption in the delivery of inbound mail.

Similar principals also apply to applications such as web servers and site to site vpns.

Consumers dont require static addressing as they haven't a need to run such service, ISP's also forbid running externally facing servers on there consumer products and push people towards purchasing there business services which tend to include lower line contention rates for DSL technologies as well as static addressing.
 
i think the op may have been mixing static WAN IP and internal IP up. Not that it matters. And since isp's are obliged to record any one ip at any one time and the owner thereof i find it highly unlikely that you could be brought to task over another users misuse of the internet, quite likely inadmissable as evidence anyway.
 
There may not be able problems legaly with what the person who had the IP before you did, but that doesnt mean the person couldnt have got the IP banned from tons of places, leaving any new owners of that IP blocked from them same places untill a new IP is obtained.
 
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