IPSec is commonly used to safely connect two networks to each other over the internet, such as the scenario where a branch office is connected to a central office. However, IPSec can also be used to connect a device to the network behind a firewall (aka "Road Warrior").
MikroTik L2TP over IPsec VPN Server Tutorial Guide for Oct 24, 2019 Azure VPN Gateway: Create and manage S2S VPN connections Update the VPN connection pre-shared key, BGP, and IPsec/IKE policy View and update your pre-shared key. Azure S2S VPN connection uses a pre-shared key (secret) to authenticate between your on-premises VPN device and the Azure VPN gateway. Set up VPN Server - Synology DSM Help
Here are the steps to verify and troubleshoot Remote VPN connections to a MikroTik Router using L2TP over IPSec. Ensure that proper firewall ports are open – More info on Mikrotik L2TP/IPSec Firewall Rules here; Verify that the L2TP server is enabled; IPSec secret matches on router and client; Verify that a compatible IPSec proposal is configured
VPN Configuration - Apple Community Sep 24, 2016
/interface l2tp-server server set enabled=yes use-ipsec=required ipsec-secret=mySecret default-profile=default required is set to make sure that only IPSec encapsulated L2TP connections will be accepted. Now what it does is enables L2TP server and creates dynamic ipsec peer iwth specified secret
Antireplay—The IPSec receiver can detect and reject replayed packets. IPSec Overview. IPSec is a framework of open standards that provides data confidentiality, data integrity, and data authentication between participating peers at the IP layer. IPSec can be used to protect one or more data flows between IPSec … Mikrotik L2TP over IPSec troubleshooting - jcutrer.com Here are the steps to verify and troubleshoot Remote VPN connections to a MikroTik Router using L2TP over IPSec. Ensure that proper firewall ports are open – More info on Mikrotik L2TP/IPSec Firewall Rules here; Verify that the L2TP server is enabled; IPSec secret matches on router and client; Verify that a compatible IPSec proposal is configured IPsec VPN - UntangleWiki Mar 24, 2020