Add Forward Multiple Ports Over SSH as a unix til

README.md

@@ -10,7 +10,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 For a steady stream of TILs from a variety of rocketeers, checkout
 [til.hashrocket.com](https://til.hashrocket.com/).
 
-_602 TILs and counting..._
+_603 TILs and counting..._
 
 ---
 
@@ -537,6 +537,7 @@ _602 TILs and counting..._
 - [Exclude A Directory With Find](unix/exclude-a-directory-with-find.md)
 - [File Type Info With File](unix/file-type-info-with-file.md)
 - [Find Newer Files](unix/find-newer-files.md)
+- [Forward Multiple Ports Over SSH](unix/forward-multiple-ports-over-ssh.md)
 - [Get The Unix Timestamp](unix/get-the-unix-timestamp.md)
 - [Global Substitution On The Previous Command](unix/global-substitution-on-the-previous-command.md)
 - [Globbing For All Directories In Zsh](unix/globbing-for-all-directories-in-zsh.md)

unix/forward-multiple-ports-over-ssh.md

@@ -0,0 +1,20 @@
+# Forward Multiple Ports Over SSH
+
+I sometimes find myself doing web app development on another machine via an SSH
+connection. If I have the server running on port 3000, then I like to use
+SSH's port forwarding feature so that I can access `localhost:3000` on my
+physical machine.
+
+```bash
+$ ssh dev@server.com -L 3000:localhost:3000
+```
+
+What if I have two different servers running? I'd like to port forward both
+of them -- that way I can access both.
+
+SSH allows you to forward as many ports as you need. The trick is to specify
+a `-L` for each.
+
+```bash
+$ ssh dev@server.com -L 3000:localhost:3000 -L 9009:localhost:9009
+```