I just enabled OpenVPN server in my router (gl-inet, openwrt-based), transferred the client.ovpn file to my phone, and bam. Whenever I'm away from home, I light up the VPN on the phone, and bam. There's my TheLounge IRC instance and other stuff just as if I was local.

Oh, I also set up a dynamic DNS service on said router, even though my IP address seldom changes, Murphy's law says the most important time for me to be able to tunnel home would be after an outage or something that reassigns the IP.