we are having clearcase in our organization production network. There is another separate network which is having limitted ports are opened. The users in production network will not be there in lab network.
Is it possible to open few ports and access clearcase from the lab network?
That depends on your support IT and network admins, but yes, you can open ports if you know which ones are important for ClearCase.
See "About Firewalls and ClearCase"