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Confusing speed tests with IPS & various VPN protocols

This topic has been covered before a few times but I was hoping to get some help wrapping my head around what I'm seeing.

I tested 5 VPN configurations both with and without IPS turned on.
As  previously documented IPS kills basic throughput (without a VPN).

I'm puzzled, though, with the results using various VPNs.
In most instances, IPS improves throughput on downloads and not with uploads Open VPN (TCP) excepted.
This seem counter intuitive.

Also Wireguard performance is horrible through the UTM - also counter-intuitive.  Wireguard is supposed to be much faster.
The fact that Wireguard is so much slower on domestic (US) connections is simply bizarre.
Is someone taking that extra time to snoop on the connection?  [Conspiracy theory !]

Hardware is my own - generally overkill, though I don't recall what specifically it is.
CPU Utilization during tests

Can anyone think of a rationale for these results?

Thanks IA.



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  • I switched from Wireguard via Switzerland to UDP OpenVPN via Switzerland based on these results.

  • After doing a bunch more testing, something popped out at me.
    The standard deviation of results using the local net (wifi to gigabit fiber) is very high.

    I think all of my wonky results are a function of a problem with my local network.

    Time to test some network and perhaps replace some gear.
    This thread has perhaps been a waste of your time, but certainly not mine.

    Cheers