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A PPTP tunnel is instantiated by communication to the peer on TCP port 1723. This TCP connection is then used to initiate and manage a GRE tunnel to the same peer. The PPTP GRE packet format is non standard, including a new acknowledgement number field replacing the typical routing field in the GRE header. However, as in a normal GRE connection ...
In conjunction with PPTP to create VPNs.; In conjunction with IPsec VPNs to allow passing of routing information between connected networks.; In mobility management protocols.; In A8/A10 interfaces to encapsulate IP data to/from Packet Control Function (PCF).
Any data sent to the proxy server is now forwarded, unmodified, to the remote host [3] and the client can communicate using any protocol accepted by the remote host. In the example below, the client is starting SSH communications, as hinted at by the port number in the initial CONNECT request. SSH-2.0-OpenSSH_4.3\r\n ...
In computer networks, a tunneling protocol is a communication protocol which allows for the movement of data from one network to another. They can, for example, allow private network communications to be sent across a public network (such as the Internet), or for one network protocol to be carried over an incompatible network, through a process called encapsulation.
The 12 "A" bits were 0 in the original RFC 4380 specification, but were changed to random bits chosen by the Teredo client in RFC 5991 to provide the Teredo node with additional protection against IPv6-based scanning attacks. Bits 80 to 95 contain the obfuscated UDP port number. This is the port number that the NAT maps to the Teredo client ...
The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...