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The Internet has become so firmly entrenched in our lives that even those who started using it at a conscious age do not remember very firmly what we replaced this…

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How to choose a contractor for promotion on the Internet?
We are engaged in online marketing. Every day, our sales team helps customers determine the contractor and how to evaluate his work. Often we are asked to help navigate a…

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Landing Myths
Creating a high conversion landing page is a whole deal, right? And to want the landing page to look beautiful and cling to visitors is an understandable desire. But you…

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pptpclient can act as either

PPTP VPN

This protocol allows you to implement a secure point-to-point connection by creating a tunnel in an insecure network.

The work of PPTP is to implement PPP frames in IP packets for transferring them to any IP network, including the Internet. In addition, this technology can be used to create a tunnel between local networks.

A TCP connection is used to service the created PPTP tunnel.

Brief specification
The protocol specification was published in 1999 in RFC2637, but the IETF community has not ratified it.
Less secure than IPSec, PPTP establishes a PPP session using the GRE protocol. The 1723 TCP port is used to control and initiate the GRE connection. Redirecting PPTP to the firewall is difficult because the protocol requires two sessions to be established simultaneously. Continue reading

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