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What Ports does VPN need?

If you are at this point thinking "What's a port?" and squinting at the odd things below... relax. you don't need to know. This information is provided for network administrators who want to allow or block VPN access to their network (such as a private home network.)
ServiceProtocol NumberSource and Destination Port
ISAKMP/IPSEC Key Management 17 (UDP)500
IPSEC Tunnel Encapsulation 50 (ESP) N/A
IPSEC NAT Transparency 17 (UDP) 10000 (default)
November 22, 2009

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