Answer by sjbotha for Connect to my company's intranet LAN-only web site from outside with ssh tunnel

SSH command-line version:

ssh -L 90:devserver:80 remotehost.example.com 

Now browse to http://devserver:90/

Remember that /etc/hosts must point to 127.0.0.1

With PuTTY, under SSH Tunnels:

1. In Source Port enter 90
2. In Destination enter devserver:80
3. Click Add
4. Remember to go back to session and click save.

Better than all the tunneling would be to get OpenVPN setup at the office.