I'm trying to figure out a issue we've had for a while using Sophos Connect IPSec connections. In general small file transfers (say 5Mb or less) from a client to a file server happen very quickly, within seconds as expected. But larger file transfers take a while for no reason. For example:
5Mb PDF : 4 seconds
15Mb PDF : 26 seconds
This seems to ring true for almost anything including large emails or other files. Smaller emails and files are quick but larger take forever and the ratio isn't linear (like above example).
The firewall is a XG310 Gen 2 with 19.0 firmware up to date (happened on 18.* also, upgrading to 19 didn't help). The clients are all Windows 10 using Sophos Connect 2.0 IPSec connections. The antivirus being used is Sophos Endpoint w/Intercept x. The internet in this office is a fiber 500/500 and speed tests result in consistent 450-ish / 480-ish results. The users whos file saving results are above has a home 500/500 fiber connection. Using Speedtest.net they get 470/490 on their normal internet and get 60/60 when connected to our VPN.
Is this normal and if not where do I start with troubleshooting?
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