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Extremely Slow Upload Speeds

Mark Hougentogler

Ever since I installed the Sophos firewall, I noticed that I only get about 7-30Mbps upload speed.  I have 1G/1G service and I have ruled many things out and have concluded it is definitely the Sophos firewall software (I have tried 18.0.5 MR-5-Build586 and 18.5.1 MR-1-Build326).   I really want to use this firewall as I like the features and interface over the others.

I get speed tests of ~850Mbps up and down when using any firewall other than Sophos.  This even includes a different software firewall (Untangled) on the same hardware so it's nothing in the hardware that's an issue.  I have attempted the following configurations and verifications:

- verified that no QoS is active

- Disabled all UTM including ATP, DoS protection, Zero-day, ssl/tls inspection, etc...

- Logs don't show anything being blocked

- Packet captures show nothing unusual when getting slow speeds

- even went through various other posts with the same issue and found none that apply

- interfaces have no errors

- MTU is fine

- Top from CLI shows no high RAM or CPU usage during uploads

 

I know the box is capable of handling it as a speed test from the Sophos CLI gets the full speeds.  It's only traffic going through the firewall that is affected.

Hardware specs:

CPU: J3455 @ 1.50GHz (4 cores)

RAM: 6GB

HD: 128GB



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  • 0 in reply to dirkkotte

    There are no duplex issues. I verified the link on all ports and verified that each link can push the designated speeds. As mentioned, if I swap this out with any other firewall, speeds are fine both up and down using the same switches, ports and cables. I have verified that it is definitely the software.  I'm just trying to determine if its a bug or if there is something I can disable that will fix it.  I Like this firewall and would like to keep using it, but I may need to go back to using Untangle instead as that software did not have any speed issues.  

    I feel like I should also point out that I have multiple VLANs on the LAN side in case there are any known issues in that type of setup. 

    Thanks

    Mark 

  • 0 in reply to Mark Hougentogler

    Hi,

    try disabling the DDOS settings.

    Ian

  • 0 in reply to rfcat_vk

    Already off.  I even tried disabling the firewall acceleration.   So far nothing has increased upload speed when traversing Sophos.