Clarify Security Groups "Add rule": Port range vs Single port

[Lukas Ocilka]

Opening a single port actually means writing the same port into
From Port and To Port. It would be nice if the UI could handle
both: Port range / Single port (combo-box switcher might help)
and additionally users would instantly understand that they are
adding a port range or single port

UI doesn't need to 100% reflect `nova secgroup-add-rule` syntax

[Gabriel Hurley (gabriel-hurley)]

Does novaclient actually support portranges for security groups? If so, are there special flags that need to be set?

[mikelococo (mikelococo)]

"From" and "To" language evokes the idea of source and destination ports which is not what is meant here. You're really setting the first and last ports in a range. I don't think there's any sensible way to fix this bug that maintains 2 input fields. There should be a single "destination port" field that supports a sensible port specification syntax. I'm a fan of nmap syntax [1]:

 Single Port: 1234
 Port Range: 1234-1236
 Port List: 22,443,1234

This is related to #955878, which calls this problem out among others and was marked wontfix due to too many unrelated issues being reported in one bug.

[1] http://nmap.org/book/man-port-specification.html