DDNS and OpenVPN setup on Sophos Firewall

Reference doc:

https://doc.sophos.com/nsg/sophos-firewall/18.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Network/DynamicDNS/index.html

https://doc.sophos.com/nsg/sophos-firewall/18.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Network/DynamicDNS/NetworkDynamicDNSProviderAdd/index.html

https://www.asus.com/tw/support/FAQ/1033906/

DDNS and OpenVPN setup on Sophos Firewall

Failed to connect to OpenVPN server after upgrade ASUS router firmware

 

On the OpenVPN client, you receive the following error:

 

AUTH_FAILED (Authentication Fail)

 

 

Solution:

Change the "Allow only specified clients" to "No"

 

 

Failed to connect to OpenVPN server after upgrade ASUS router firmware