Hello
We have gone through your job description and we can develop a web page where you can put an IP and it gets added to the Windows firewall to a specific rule.
We have a team of developers having experience ranging from 1 to 12 years in Microsoft.Net based Technologies.
Highlights of our expertise are : Web and Windows development using ASP.Net, MVC, C#, WPF, WCF, SQL server, WebAPI, JQuery, Bootstrap, XML etc.
Please contact us in a chat and we can discuss the details.
Thanks