title: TF31002: Unable to Connect to this Team Foundation server
body: <p>I have a server that the team foundation server is installed on. I can connect to TFS from several computers, but I can't connect to its from my laptop through internet. I can connect to it from web, but I can't via team explorer. </p>
  
  <p>Indeed I can't add server via team explorer in visual studio, and I receive following error.</p>
  
  <p><img src="https://i.stack.imgur.com/I8gFC.png" alt="TF31002 Error message"></p>
  
  <p>I have connected to this server for 3 months. Then I deleted the team project from server and worked offline. Now I want to add my solution to TFS, but I can't connect to it.</p>