Q: What is Use Proxy Port and what

Q: What is Use Proxy Port and what are the associated configuration options?
A: In NetScaler version 9.1 and later, an enhancement was made to the Use Source IP (USIP) functionality. In some older versions of NetScaler, USIP connections were reused, and there was a 64k maximum USIP connection limit. Now NetScaler can control connection reuse, preserve the client source port, and is no longer under a 64k connection limit.

Use Proxy Port has two options, YES and NO. If YES is selected, the client port is not preserved, NetScaler uses a proxy source port and the connection might be reused. If NO is selected, the client source port is preserved and no reuse occurs.

To configure Use Proxy Port option from GUI, either create a new service or edit an existing service and then select the Advanced tab: