I know I'm late to the party here but just thought I'd give my two cents. Today I was able to set up AnyConnect on my Windows 11 computer and VPN to multiple MX64W's. Have had the slow VPN issue previously when using WiFi, but doesn't occur on ethernet. Wireshark worked and Remote services worked but only temporary solutions. So in summary - if you are using the Windows native VPN and having trouble, try setting up AnyConnect (Cisco Secure Client) and see if it works. I didn't have to purchase any additional AnyConnect licenses or hardware. It was all good to go basically.
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