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LAN & WAN Reviews

VPN Performance

Since I didn't ask Sonicwall for two TZW's, I did my VPN throughput testing using my Dell Inspiron 4100 laptop running Sonicwall's Global VPN client. I used my laptop's 10/100 Ethernet port running at 100Mbps full duplex and plugged it into one of the switch ports in my network's main router. This connected me to the TZW's WAN port which was plugged into another of the router's ports. I then added a new VPN connection using the Global Client's wizard and I connected up on the first try. The test results are shown in Table 1.

Table 1: IPsec VPN Performance test results

Firmware Version:

Test Description

Transfer Rate (Mbps)

Response Time (msec)

UDP stream 
[10S@500 kbps]

(Actual throughput- kbps)

(Lost data- %)

Local to Remote


3 (avg)
4 (max)


0 %

Remote to Local


3 (avg)
4 (max)


0 %

This is great performance and more than needed for most SOHO and SME broadband connections. But since the same endpoint is used for the encrypted WiFiSec wireless connections, Sonicwall has wisely designed the TZW with enough VPN headroom to handle that load, too. If more performance tuning is needed, remember that you can enable the VPN bandwidth control to balance off wired and wireless VPN performance.

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