Iodine

Tunneling IPv4 traffic over DNS.

Using this as a desperate measure, since SSL traffic can't seem to punch through this unusually restrictive firewall.

iodine is the client application, iodined is the server.

Server

apt-get install iodine

sudo iodined -c -f 10.0.0.1 -P prettygoodpassword tunnel.reidmachine.party

This creates a new network interface with ip 10.0.0.1 (virtual).

Pi Client

apt-get install iodine

sudo iodine -I 50 -f -P secretpassword  tunnel.reidmachine.party

References

http://calebmadrigal.com/dns-tunneling-with-iodine/