The use of a host name instead of static IP address is recommended when non-address Peer identifiers are used. This allows the public gateway address to be modified without invalidating Client Site Configurations. Port. Enter the UDP port that the VPN Client Gateway is using for IKE services. The default value for this setting is UDP port 500.
What ports do I need to open to permit VPN traffic ? :: SG FAQ For L2TP/IPSEC VPN connections, you need to open UDP port 500 for Internet Key Exchange (IKE) traffic, UDP port 4500 (IPsec control path) and UDP port 1701 for L2TP traffic. IPsec ESP traffic also uses IP protocol 50. SSTP connections use TCP port 443 (SSTP traffic to/from the VPN server) What is a VPN Port? - Definition from Techopedia Similarly, IPSec-based VPN that provides a higher level of security utilizes several ports for security, such as IP port numbers 50 and 51 for Encapsulated Security Protocol (ESP) and Authentication Header (AH), respectively. It also utilizes UDP port 500 and 4500 for phase 1 and 2 negotiations. Which ports do you need to open on a firewall to allow To enable VPN tunnels between individual host computers or entire networks that have a firewall between them, you must open the following ports: PPTP. To allow PPTP tunnel maintenance traffic, open TCP 1723. To allow PPTP tunneled data to pass through router, open Protocol ID 47. L2TP over IPSec. To allow Internet Key Exchange (IKE), open UDP 500.
About Azure Point-to-Site VPN connections | Microsoft Docs
Nov 28, 2016 How to Enable VPN Passthrough - IPsec Firewall Port - Tom May 20, 2003 Cisco RVL200 4-Port SSL/IPsec VPN Router - Cisco
The terms "IPSec VPN" or "VPN over IPSec" refer to the process of creating connections via IPSec protocol. It is a common method for creating a virtual, encrypted link over the unsecured Internet. Unlike its counterpart (SSL), IPSec is relatively complicated to configure as it requires third-party client software and cannot be implemented via
How to Enable VPN Passthrough - IPsec Firewall Port - Tom May 20, 2003 Cisco RVL200 4-Port SSL/IPsec VPN Router - Cisco