Configure NetScaler SD-WAN WANOP plug-in with Access Gateway VPNs
The Access Gateway Standard Edition VPN supports NetScaler SD-WAN WANOP Plug-in acceleration, provided that a NetScaler SD-WAN WANOP appliance is deployed with the Access Gateway appliance and the Access Gateway appliance is configured to support it.
For NetScaler SD-WAN WANOP Plug-in support with other VPNs, see your VPN documentation or contact your NetScaler representative.
To configure NetScaler SD-WAN WANOP support, use the Access Gateway administration tool, as follows:
On the Global Cluster Policies page, under Advanced Options, select the Enable TCP optimization with NetScaler SD-WAN WANOP Plug-in check box.
Make sure that the IP addresses used by the NetScaler SD-WAN WANOP (redirector IP and management IP) have access enabled in the Network Resources section on the Access Policy Manager page.
For each of these addresses, enable all protocols (TCP, UDP, ICMP) and enable Preserve TCP Options.
Make sure that these same addresses are included under User Groups: Default: Network Policies on the Access Policy Manager page.
VPN support options
VPN support is simply a matter of putting the appliance on the LAN side of the VPN, as shown in the following figure. This placement ensures that the appliance receives and transmits the decapsulated, decrypted, plain-text version of the link traffic, allowing compression and application acceleration to work. (Application acceleration and compression have no effect on encrypted traffic. However, TCP protocol acceleration works on encrypted traffic.)
VPN Cabling for an Inline VPN
The following figure shows one option for accelerating one-arm VPNs. The appliance is on the server side of the VPN. All VPN traffic with a local destination is accelerated. VPN traffic with a remote destination is not accelerated. Non-VPN traffic can also be accelerated.
One-Arm VPN Acceleration, Option A
The following figure shows another option for accelerating one-arm VPNs. The appliance is on the server side of the VPN. All VPN traffic with a local destination is accelerated. VPN traffic with a remote destination is not accelerated. Non-VPN traffic can also be accelerated.
One-Arm VPN Acceleration, Option B
For acceleration to be effective, the VPN must preserve TCP header options. Most VPNs do so.