Mailto - HTML
In order to somehow dilute the design theme, let's look at another layout lesson today - a lot of time has passed since the previous post about CSS hover effects.…

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Personal Data Security
What is personal information and why does the state develop entire laws designed to protect such data? Imagine that you are making an order online. In the process of forming…

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Retargeting What is it? And how to use it to increase the likelihood of a purchase?
Retargeting What is it? And how to use it to return visitors to the site? It is human nature to choose. In this regard, not every user who visits the…

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protocols that use checksum calculation

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

Present day viruses
There are a huge number of computer viruses in the world. To establish their exact number (along with all modifications and upgrades) no one is taken. Instead, it is customary…

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Local Area Networks and the Internet
When a local area network is connected to the global Internet, one of the PCs, called a server, becomes a kind of conductor and connects to the Internet using a…

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Personal Data Security
What is personal information and why does the state develop entire laws designed to protect such data? Imagine that you are making an order online. In the process of forming…

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Connect Xbox 360 via VPN server
Regional content protection checks your account for belonging to a specific country, and checks it against the IP address of your console. If your account is American, and the IP…

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