Why is my IP address changing?

As participant of the net, you have an , under that you appear. If you do not use a dedicated line to connect to the internet, you internet service provider assigns an address to you, oncde you dial in. The provider has a pool of leased addresses, and selects a cuurently free one.

Hence, the address can change depending on availability.

If you connect via dial up with a modem, it is most likely to get another address on every connect.

If you use DSL, especially with a flatrate, the IP adress should change less often. A change is possible during the disconnect, that a provider forces regularly – usually every 24 hours – or at expiration of the lease-time. This lease time describes, how long the address will remain valid. Afterwards it is replaced by a new one.

Of more importance are these address changes, if you want to steadily appear as a communication partner. An example would be the operation of a webserver. It can not be addressed with its IP address, if the address keeps changing. This problem is solved with dynamic DNS.


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