I used Qcheck and IxChariot to get a handle on the WZR's PPTP tunnel throughput. The chart below shows that the PPTP tunnel throughput in both directions is the fastest that I've ever seen! Its 14 - 16Mbps is faster than some consumer routers provide for normal NAT routing and enough to keep up with even some of the faster broadband connections available outside the U.S. And all without RC4 encryption hardware acceleration in the Broadcom processor.
Although the number of User accounts that the WZR supports is 100, I asked Buffalo whether there was a limit on the number of simultaneous PPTP tunnels. The reply came back that there is no hard limit enforced (nor is there any way to limit it in the User interface), so it's up to the administrator to monitor his / her network traffic patterns to ensure that tunnel users' response times are satisfactory.
IPsec VPN Performance Test Results
|Test Description||Transfer Rate (Mbps)
[1 MByte data size]
|Response Time (msec)
[10 iterations 100 Byte data size]
[10s @ 500kbps]
|Actual throughput (kbps)||Lost data (%)|
|Local to Remote||14.4||1 (avg)
|Remote to Local||16.2||1 (avg)
|Firmware Version||V 2.31|