I self-host my own strongSwan VPN server.
When running Borg backups to a remove filesystem (running on a different server), I am able to upload at ~ 2.5MB/s without the VPN and ~ 1.5MB/s over the VPN.
Is that normal? When I run a test on speedtest.net (over the VPN), I am able to reach upload speeds of 40Mbps (8MB/s).
The Borg backup server ingest speed is slower than my upload speed... OK... but why can't I upload at ~ 2.5MB/s over the VPN given I can run a test on speedtest.net at 8MB/s?
Btw, I confirm it isn't a CPU issue on the client or server.
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