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Fortinet FortiGate and; Array Networks AG SSL VPN (since 8.20) [6] It was originally written as an open-source replacement for Cisco's proprietary AnyConnect SSL VPN client, [7] which is supported by several Cisco routers. As of July 2023, support for several other proprietary VPN protocols is desired or in development:
The process of setting up an L2TP/IPsec VPN is as follows: Negotiation of IPsec security association (SA), typically through Internet key exchange (IKE). This is carried out over UDP port 500, and commonly uses either a shared password (so-called " pre-shared keys "), public keys, or X.509 certificates on both ends, although other keying ...
In computing, Internet Protocol Security (IPsec) is a secure network protocol suite that authenticates and encrypts packets of data to provide secure encrypted communication between two computers over an Internet Protocol network.
Virtual private network (VPN) is a network architecture for virtually extending a private network (i.e. any computer network which is not the public Internet) across one or multiple other networks which are either untrusted (as they are not controlled by the entity aiming to implement the VPN) or need to be isolated (thus making the lower network invisible or not directly usable).
Split tunneling is a computer networking concept which allows a user to access dissimilar security domains like a public network (e.g., the Internet) and a local area network or wide area network at the same time, using the same or different network connections.
Anti-replay is a sub-protocol of IPsec that is part of Internet Engineering Task Force (IETF). The main goal of anti-replay is to avoid hackers injecting or making changes in packets that travel from a source to a destination.
FortiGate: Proprietary: Included on all Fortigate devices Proprietary, FortiOS, Based on the Linux kernel Palo Alto Networks: Proprietary: Included on Palo Alto Networks firewalls Proprietary, PAN-OS, Based on the Linux kernel Sophos: Proprietary: Included on Sophos UTM Linux-based appliance Cisco Firepower: Proprietary: Included on newer CISCO
In Windows XP, NAT traversal is enabled by default, but in Windows XP with Service Pack 2 it has been disabled by default for the case when the VPN server is also behind a NAT device, because of a rare and controversial security issue. [6] IPsec NAT-T patches are also available for Windows 2000, Windows NT and Windows 98. [citation needed]