Aug 08, 2019
LT2P VPN connection issues — WatchGuard Community There's a firewall policy on the watchguard for Any external to the Windows 2019 server with ports (500,1701,1723,4500,GRE,ESP,AH) open. I was thinking the watchgaurd could be the issue as the VPN on it was having issues and I have the same Windows VPN setup at … TCP and UDP ports used by Apple software products Aug 27, 2019 Work VPN stopped working after new router install- L2TP Oct 28, 2019 UniFi - USG/UDM: Configuring L2TP Remote Access VPN
If the UDP ports (500, 4500 and 1701) conflicts with other programs, IPsec communication will not work well. For example, disable the "Routing and Remote Access" service on Windows Server. If you enable IPsec/L2TP function of SoftEther VPN Server, the IPsec/L2TP function of Windows will be …
SoftEther VPN supports also L2TP/IPsec VPN Protocol as described here. You can accept L2TP/IPsec VPN Protocol on VPN Server. iOS, Android, Mac OS X or other L2TP/IPsec VPN compatible client devices can connect to your SoftEther VPN Server. Therefore, if the virtual private network (VPN) server is behind a NAT device, a Windows Vista-based VPN client computer or a Windows Server 2008-based VPN client computer cannot make a Layer Two Tunneling Protocol (L2TP)/IPsec connection to the VPN server. There's a firewall policy on the watchguard for Any external to the Windows 2019 server with ports (500,1701,1723,4500,GRE,ESP,AH) open. I was thinking the watchgaurd could be the issue as the VPN on it was having issues and I have the same Windows VPN setup at other locations that don't have this issue.
If there are strict firewall policies, do not forget to add rules which accepts l2tp and ipsec. /ip firewall filter add chain=input protocol=udp port=1701,500,4500 add chain=input protocol=ipsec-esp Now router is ready to accept L2TP/IpSec client connections. L2TP/IpSec with static IPSec server setup Ipsec/L2TP behind NAT
Service overview and network port requirements for Windows