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What is the default encryption cipher for VPN connections?
If you use OpenVPN 2.4 or later and do not specify a cipher in your OpenVPN configuration file, then AES-256-GCM is used by default. If use a version of OpenVPN older than v2.4 then AES-256-CBC will be used as the default. For OpenVPN 2.5 and up, ChaCha20-Poly1305 is also available.
If you use WireGuard, ChaCha20 is in place to encapsulate packets.
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