Hey there! Let's break this down clearly since you're only running an ASP.NET MVC site on IIS—most of these pre-enabled firewall rules are totally unnecessary for your use case, and disabling them will absolutely help harden your VPS. Let's go through this step by step:

Rules You Can Safely Disable (All of These Are Irrelevant to Web Hosting) #

Every rule listed falls into categories that have zero to do with hosting an ASP.NET MVC website on IIS. Here's why each is safe to turn off:

• All Cast to Device-related rules: This includes TCP 10246, 10247, 2177, 23554-23556, UDP 2177, and TCP 2869 (UPnP Events). These are designed for local media streaming and device casting—completely useless on a remote web VPS.
• DIAL protocol server (HTTP-In) TCP 10247: Another rule tied to device casting, no need for web hosting.
• Microsoft Media Foundation Network Source rules: UDP 5004-5009/5000-5020 and TCP 554/8554-8558 are for media streaming protocols, which don't apply to your website.
• mDNS (UDP-In) UDP 5353 & Microsoft Edge (mNDS-In) UDP 5353: mDNS is for local network service discovery—your VPS doesn't need to respond to these requests from the public internet.
• DHCP-related rules: UDP 546 (DHCPv6-In) and UDP 68 (DHCP-In) are for client-side IP configuration. Since your VPS should be using a static IP (or the host handles DHCP server-side), these inbound rules serve no purpose.
• Delivery Optimization (TCP-In) TCP 7680: This is for Windows' file-sharing system used for updates and app downloads—irrelevant to your web server.
• AllJoyn Router (TCP-In) TCP 9995: AllJoyn is an IoT device communication protocol; you won't need this for hosting a website.

Rules You Need to Keep (Critical for Your Website) #

Wait a second—none of the rules you listed are the core ones your IIS web server needs! You must ensure these separate rules are enabled (they should be present by default if IIS is installed, but double-check):

• HTTP (TCP 80): For unencrypted web traffic (though you should redirect this to HTTPS if possible).
• HTTPS (TCP 443): For encrypted web traffic—this is essential for secure user access to your ASP.NET MVC site.

If you need to remotely manage your server (e.g., via RDP), you'll also want to keep the Remote Desktop (TCP 3389) rule enabled—though for extra security, restrict it to only your IP address instead of allowing all incoming connections.

Quick Best Practice #

Set your Windows Firewall to default deny inbound (block all incoming traffic by default) and only explicitly allow the ports you need (80, 443, and 3389 if required). This is the most secure setup for a web VPS.

After disabling all the irrelevant rules, test your website thoroughly to confirm everything works as expected. If you run into any unexpected issues (which is highly unlikely here), you can temporarily re-enable a rule to troubleshoot—but rest assured, none of the rules you listed are required for your web server to function.

备注：内容来源于stack exchange，提问作者Programmer Joe