what ports do I need to open in order for a user to connect to another network using VPN Client (cisco). port 50: Enacp Sec payload, 51: Auth Header, port 88: Kerberos, port 500: isakmp tcp/udp
If you're connecting to a Cisco PIX or ASA, you don't actually need to open any ports on the device itself. There is no way to block packets destined to a Cisco PIX or ASA, access lists only block traffic through said device.
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