Networking HowTos
Networking HowTos

Common VPN ports and protocols

March 18, 2020 Networking

The following is a list of the common VPN connection types, and the relevant ports, and protocols, that generally need to be open on the firewall for VPN traffic to flow through.

PPTP

Protocol Port
TCP 1723
GRE (Proto 47) N/A

SSTP

Protocol Port
TCP 443

L2TP

Protocol Port
UDP 1701

IPSec

Protocol Port Description
UDP 500 IKE
UDP 4500 NAT-Traversal
ESP (Proto 50) N/A ESP
AH (Proto 51) N/A AH

L2TP with IPSec

Protocol Port Description
UDP 1701 L2TP
UDP 500 IPSec
UDP 4500 IPSEC – NAT Traversal

OpenVPN

Protocol Port Description
UDP 1194 Default Protocol
TCP 1194 Alternate Protocol

IKEv2

Protocol Port Description
UDP 500 IPSec IKEv2
UDP 4500 NAT Traversal

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