SamPrime:
There is any typical ports for Yun? I can only make a pseudo-connection by using port 22 (like ssh), still have issues with port 8080 or port 5555.
Did you turn off firewall for testing?
/etc/init.d/firewall stop
If it works at firewall off, then setup iptables rule for port 8080 or port 5555 then turn back on the firewall.