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ic i have sean the PTCL “Download Broadband Installation Guide” in the TCP/IP they gave calss C IP address and at the end they choose "Obtain IP address Automatically but in the DNS the IP remains as it is.
Well it means that if we use ipconfig command it will show us the class C ip address which we gave durning installation.In the guide they rovide 192.168.1.3 IP address.So each time the windows start the IP will be same or it will change.If u r using PTCL broadband please check your ip at the moment ,disable it and again check that is the class C IP address is same or it is new one now.
192.168.1.3 is the internal IP provided to your computer by your ADSL modem. You can choose to have the modem provide it to you automatically when windows starts or you can choose one yourself and that will remain fixed.
The dynamic IP WAN IP that PTCL assigns you is assigned to your modem and you can see it in one of your modem settings in the install guide where it says to obtain IP automatically. If you change this setting you need to know the WAN IP provided to you by PTCL. PTCL does not disclose this info and they usually change your WAN IP periodically.
There are some dynamic-to-static IP converter services available online but they are usually not free. They provide you with a static IP and then associate your dynamic IP with it. Then they monitor your dynamic IP. When your dynamic IP changes, they update your static IP with the new dynamic IP. So it is like having a static IP. Do search online maybe you will find a free one.