Speed Test Issues with DPI Enabled on SonicWall NSA 4700 nsa
sukarechhe
Newbie ✭
Hope everyone doing well here,
I am currently using a SonicWall NSA 4700 NSA with enabled. Recently, I have encountered a strange issue during speed tests. When I initiate the speed test, the download speed starts at around 999 Mbps but then gradually decreases to approximately 80-90 Mbps. The same behavior is observed with the upload speed.
Interestingly, when I disable DPI, the speed test results are consistent and perform as expected.
Has anyone in the community experienced a similar issue? I would appreciate any guidance on diagnosing and resolving this problem.
Category: Mid Range Firewalls
0
Answers
"when I disable DPI"
Do you mean you change the firewall to SPI only, or are you referring to DPI-SSL?
Thanks for reply @TKWITS - I mean "DPI-SSL"
Are you doing Gateway AV with 'TCP Stream' enabled? I have seen where that decimates speed test performance.
Otherwise open a ticket with support.
We experience the same issue with our 3700 series with DPI-SSL enabled, whether or not TCP Stream is enabled. I opened a ticket with support, their suggestions fail to fix our issue. When we upgraded to 7.1.2, DPI-SSL broke and they issued us firmware with the HF suffix (e.g. hot fix). I'm still waiting for the next firmware release and praying it fixes it. Today we wiped both units and reloaded the firmware, there was no change. We also have a 1GB WAN connection, with upload speed around 70-100 Mbps. Download is ~500Mbps with DPI-SSL enabled.
I'm very interested if you find a fix or they issue you a different firmware.