Point-to-Point Tunneling Protocol (PPTP)

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Point-to-Point Tunneling Protocol (PPTP):

Point-to-Point Tunneling Protocol (PPTP) is an extension of PPP that takes advantage of the authentication, compression, and encryption mechanisms of PPP. With dial-up remote access, PTTP is the most commonly used protocol but for single client-to-server connections as it allows only a single point-to-point connection per session. It encapsulates PPP frames into IP datagrams for transmission over an IP network. PPTP tunnels the PPP frame within a Generic Routing Encapsulation (GRE) header using IP protocol 47 and a TCP header using port 1723.

For PPTP traffic to pass through a firewall, the firewall must allow TCP port 1723 and IP protocol 47. PPTP is commonly used by Windows clients for nonparallel communications.

It allows IP, IPX or…

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