Update FAQ.md

doc/Guides/FAQ.md

@@ -2,6 +2,8 @@
 
 > work in progress
 
+### How do I use this feature?
+
 <details>
   <summary>How to Send/Sync custom data types?</summary>
   
@@ -26,3 +28,53 @@
   - [DataTypes](https://mirror-networking.com/docs/Guides/DataTypes.html)
   - [Serialization](https://mirror-networking.com/docs/Guides/Serialization.html)
 </details>
+
+
+### How to Connect
+
+<details>
+  <summary>How to connect to games on same PC</summary>
+
+  Make sure the networkAddress field on NetworkManager or the Hud is set up `localHost`
+</details>
+
+<details>
+  <summary>How to connect to a different PC/Device on same network</summary>
+
+  Set the networkAddress field to the LAN IP of the host `192.168.x.x`
+
+  *In some cases you may need additional steps, check below*
+
+  To check ip on Windows you can open powershell and use the `ipconfig` command, then under your current adapter (ethernet/wifi/etc) look for `IPv4 Address`
+
+  ` IPv4 Address. . . . . . . . . . . : 192.168.x.x `
+</details>
+
+<details>
+  <summary>How to connect to a different PC/Device over the internet </summary>
+
+  Set the networkAddress field to be the IP address of the host (google 'whats my IP')
+
+  > This section does not cover relays/dedicated vps/headless features
+
+  For this to work, you will need to do **some** of the following, most of these depend on your set up and router
+
+  - **Port forward**: you'll have to login your Router
+    - Either forward your game port (default is 7777) for your PC's local IP. (192.168.1.20 for example) 
+    - Or the quick (but less safe) add that local IP to DMZ.
+
+  - **PC Firewalls**: 
+    - You can turn it off for a quick test (And turn it back on later)
+    - manually allow the editor and any builds you create it in firewalls settings.
+
+  - Try from a build rather than the Unity Editor
+  
+  - Some anti virus/phones may have additional blocking.
+    - You can turn it off for a quick test (And turn it back on later)
+  
+  - In rare cases ISPs or companies/schools block ports and connections, this is harder to adjust yourself.
+
+  If you need more help it is best to google for guide for your setup and router.
+
+  An alternative to the above is to use a dedicated server (vps) or use a relay.
+</details>