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ip address
richardcdon
Posts: 556
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would anyone have a idea why sky seem to give me a new ip address every day now, i kept my last one for 4 months really anoying!! im gonna ask them for a fixed one if possible :yawn:
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These days there's such a shortage of them that most ISPs reuse them as soon as possible, often handing out only 24-hour leases. When the lease expires, if you're not actively using the connection, the address will be given to someone else, and you'll be handed another address from the pool when you reconnect.
Even if Sky will hand out fixed addresses, most ISPs reserve them for business customers, and charge extra.
I don't see how that is technically possible. without taking down the connection.
I also don't see why it is desirable. you would have to immediately re-issue a new IP. so i don't see how it would help with the shortage.
This thing people think you can basically use a dynamic (most uk ISP's use them) as a static IP is very silly, Sky use sticky IP's but they can change at any time.
You only need an IP address when there is IP traffic. If you go to bed at 11pm, and don't use the link again until 8am the next day, you have no need of an IP address for those 9 hours.
I'm not sure that is correct. I've never heard of it working that way. I'm not aware of any implementation that has open TCP connections and only allocats IPs on traffic.
What is far more likely is that the router is dis-connecting and then re-connecting and getting a different IP address. Check your router and see how long it says the connection has been up for.
That would be my best guess too. That was what I was driving at, that it points to instability on the line.
If it is within the period of the original DHCP lease, it will probably get the same address back again. If the lease expires, then it could get allocated a new one. Mine gets addresses on a 24-hour basis, renewed every day. With a dynamic DNS service like dyndns.com you can usually configure the router to register the new address with your choice of hostname, so externally you'll never need to care what IP address you have,
Again i understand what you are saying. i just don't think it's how it works.
As you say, you can configure the router to only connect on demand and to drop the connection if it is not used. However, this is not a good idea with ADSL as when it keeps disconnecting/connecting it can slow down the sync as it will look like the line is not stable.
Why would it do that when releasing an IP address if (quote):
"It can remain connected at the ATM level with no active IP layer" ?
I'm happy to be shown my mistake but I don't see your point.
There is. Google "dynamic DNS". On one of the setup screens of your router there will be an option to configure a dynamic DNS service. You first need to create an account with one of the providers (I use dyndns.org, they used to be free but apparently aren't free now. [url]http:///www.dnsdynamic.org/[/url] looks like the right sort of company, but I don't know anything more about them).
You can create a hostname like "myhomecamera.dyndns.org" and every time the router gets a new IP address it will automatically login to the dynamic DNS provider and update your hostname to point to the new address. That way you don't need to care what the IP address is, you just always connect to the same hostname.
legend, sorted thanks give your self a beer:cool:
Glad it worked. Cheers !