Per RFC 6335, ports in range 49152-65535 are for clients to open a temporary TCP session.
We use the following ports for servers to move accordingly:
- 50000: Jenkins controller's port for JNLP-based Jenkins agents - CD
- 52000: Jenkins controller's port for JNLP-based Jenkins agents - Test
- 55000: Jenkins controller's port for JNKP-based Jenkins agents - CI