This is neither a WebIQ nor a ctrlX question and cannot be fully answered here. You need to familiarize yourself with web technology and networking in general to setup a secure system or ask or hire someone with the corresponding knowledge. Just some hints here: If you want to make it available directly to the internet so anyone with the IP address or host name can access it you do not need any VPN but should definitely use HTTPS to prevent the credentials from being transferred unencrypted - this is however not recommended as it makes available internal services that should probably not be reachable by everyone on the internet even if protected by a login If you only want to make it available safely through the internet VPN is recommended and has to be setup accordingly - then it could only be accessed by users when they are connected to the VPN only - this is the recommended way 192.168.1.1 is a private IP address and as such can never be reached through the internet: https://en.wikipedia.org/wiki/Private_network#Private_IPv4_addresses - the external IP of your customer would have to be routed and used accordingly Please note that there is a wealth of information on this topic available online.
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