How do I map a port to a different port with IIS rewrite rules?

Question

I want to proxy public ports, for example 20001, to a local port that's always 5000 lower (15001). How can I accomplish this using rewrite rules?

Answer 1

Here are the steps to accomplish your goal :

1. Open IIS Manager and navigate to the website you want to configure.
2. In the Features View, double-click URL Rewrite.
3. In the URL Rewrite module, click the Add Rule(s) action in the right-side panel.
4. Select Reverse Proxy as the rule template, then click OK.
5. In the Inbound rule section, specify the following information:
   • Rule name: Give the rule name like "Reverse Proxy Port 20001 to 15001".
   • Requested URL: Matches the Pattern.
   • Using: Wildcards.
   • Pattern: :20001/
6. In the Outbound rule section, specify the following information:
   • Server Proxy Pass Through: Checked.
   • URL Rewrite: Unchecked.
   • Reverse rewrite host in response headers: Checked.
   • To: The URL of the local website or application, using the local port, for example: http://localhost:15001
7. Click Apply in the right-side panel to save the changes.

With this configuration, incoming requests to http://[domain]:20001/ will be redirected to http://localhost:15001/.