VPN Protocols

 VPN Protocols 

 

OpenVPN - 1194 (UDP) or 443 (TCP) 
OpenVPN is an open-source VPN protocol that uses SSL/TLS for key exchange. It's highly configurable and widely used for its security and flexibility. 

IPsec (Internet Protocol Security) - IP protocol 50 (ESP), UDP 500 (IKE) 
IPsec is a suite of protocols used to secure Internet Protocol (IP) communications. It provides encryption, authentication, and integrity verification for VPN connections. 

L2TP/IPsec (Layer 2 Tunnelling Protocol/Internet Protocol Security) - UDP 500, 1701, 4500 
L2TP/IPsec combines the best features of L2TP and IPsec. L2TP provides the tunnelling protocol, while IPsec provides the security features. It's commonly used in corporate VPN setups. 

PPTP (Point-to-Point Tunnelling Protocol) - TCP 1723 
PPTP is an older VPN protocol known for its ease of setup. However, it's considered less secure than other protocols due to known vulnerabilities. 

SSTP (Secure Socket Tunnelling Protocol) - 443 
SSTP is a VPN protocol developed by Microsoft. It uses SSL/TLS for encryption and can bypass firewalls that block other VPN protocols since it typically uses the HTTPS port (443). 

IKEv2 (Internet Key Exchange version 2) - UDP 500 
IKEv2 is a VPN protocol that is particularly good at automatically re-establishing a VPN connection when users temporarily lose their internet connections. It's commonly used in mobile VPN applications. 

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