4 ms·

VPNs are almost always over UDP. See IPSec (most common VPN implementation): https://www.cloudflare.com/learning/network-layer/what-is-ipsec/ https://www.cloud

VPNs are almost always over UDP. See IPSec (most common VPN implementation): https://www.cloudflare.com/learning/network-layer/what-is-ipsec/ https://www.cloudflare.com/learning/network-layer/what-is-ip... See Wireguard (increasing popularity): https://www.wireguard.com/ https://www.wireguard.com/

xav0989 6y ago
Doesn't IPSec operate at the same level as TCP/UDP? TCP is protocol 6, UDP protocol 17; while IPsec uses protocol 50 for ESP (encrypted) and 51 for AH (authenticated).
- amaccuish 6y ago
  IPSEC can operate in both modes, either as a pure IP protocol or in "nat traversal" mode, over IIRC udp 500 and 4500