open port on ubuntu in azure

You'll need to add it as an endpoint instead. From the Windows Azure preview portal, select Virtual Machines -> Your virtual machine. Then click the endpoints tab and finally New. You can see there that only SSH port is open by default.

Using Azure's new portal:

1. Open your VM.
2. Go to Network interfaces in the Settings window
3. Click on your network interface
4. In the network interface window, there is a "Network security group" section
5. In the network security group's settings click on "Inbound security rules"
6. Add a new rule

I'm not sure if there is a shorter way of getting there.. Next time I'll make sure to set up my ports when creating a VM.