Our internet bandwidth is 40 Mbps download, and 20 Mbps upload in one of our offices. We have a Sonicwall TZ300 firewall connected directly to router of the ISP. Now, when I make a speedtest behind the firewall, all I get is around 20 Mbps download. However, when I connect myself directly to the router of the ISP, I get around 40 Mbps download. The upload is relatively similar, around 15 Mbps, with or without the Sonicwall in between.
On the sonicwall
- we don’t have DPI enabled
- CPU rate is always low
- we don’t have Bandwidth Management enabled
- we don’t have any Bandwidth limitations set on the WAN interface
- we have the latest firmware installed
I think it’s normal that the firewall slows down the traffic up to a certain degree, but a loss of 50 % of performance seems too much to me – or what’s your experience?
Are there any other...