Content and idea
How to get more search visibility using other people's resources
Whatever niche you work in, there are probably dozens, hundreds, and even thousands of other sites of similar subjects. Some are your direct competitors, with others your interests overlap partially.…

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Interesting features of UI design in different countries
When you create an interface design for applications / sites operating in different countries, you should take into account the peculiarities of national cultures and traditions of the corresponding target…

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Top Web Design Articles, Downloads, and Inspiration
We continue the annual tradition and publish the most interesting notes for the "last season". Earlier in Design Mania, you could already see a similar article for 2017 and a…

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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 →

Posted in accordingly, advertising campaign, allows using a visually, browsing the website, pptpclient can act as either
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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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What is a firewall and why is it needed?
We will not go into little things like translating words, occupying them some part of the article. Just point out that a firewall (from the English - fire wall), or…

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The ideal form of authorization - how to do it is not necessary
Recently, we posted a number of useful tips on creating effective registration forms on the site, and today we want to talk about the authorization / login block. Recently, a…

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