In some situations, users who connect with the NetScaler Gateway Plug-in need a unique IP address for NetScaler Gateway. For example, in a Samba environment, each user connecting to a mapped network drive needs to appear to originate from a different IP address. When you enable address pools (also known as IP pooling) for a group, NetScaler Gateway can assign a unique IP address alias to each user.
You configure address pools by using intranet IP addresses. The following types of applications might need to use a unique IP address that is drawn from the IP pool:
You can configure NetScaler Gateway to assign an internal IP address to users that connect to NetScaler Gateway. Static IP addresses can be assigned to users or a range of IP addresses can be assigned to a group, virtual server, or to the system globally.
NetScaler Gateway allows you to assign IP addresses from your internal network to your remote users. A remote user can be addressed by an IP address on the internal network. If you choose to use a range of IP addresses, the system dynamically assigns an IP address from that range to a remote user on demand.
When you configure address pools, be aware of the following:
A bound group address range can have a subset bound to a user.
When an IP address is assigned to a user, the address is reserved for the user’s next logon until the address pool range is exhausted. When the addresses are exhausted, NetScaler Gateway reclaims the IP address from the user who is logged off from NetScaler Gateway the longest.
If an address cannot be reclaimed and all addresses are actively in use, NetScaler Gateway does not allow the user to log on. You can prevent this situation by allowing NetScaler Gateway to use the mapped IP address as an intranet IP address when all other IP addresses are unavailable.