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hello friends,
I need some advice please
I have a 2003 server host, which has only one network card, and is connected to a switch for the LAN.
I have a dlink router too, which gets a public address and has set a private address for my LAN, the router is my gateway on my server. and is connected to my switch.
Yo I can configure a VPN on my server this form or need another network card. And incoming and outgoing which port should I open in my router to access my VPN.

thank you very much