Category: Articles

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How to prevent a DDos attack?

This is an overload on the server hosting sites or services, causing access to be denied to those trying to access it at the time of the attack.

Malicious hackers use botnets to make the service crash or go offline.

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Coronavirus (COVID-19) is affecting the world’s internet

In recent months, the world has been taken by surprise by the rise of the coronavirus (COVID-19). It took a few months for it to arrive in Brazil, and the damage done so far goes beyond the lives lost and the impact on the economy. COVID-19 is affecting the internet too. The WHO (World Health

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MSBUILD : error MSB4132: The tools version “2.0” is unrecognized

It is common when installing packages in Node (npm install) to be required to install Python, Visual C++ Redistribute Kit and others. In some cases, Node conflicts with versions of the Visual C++ Redistribute Kit that are already installed. A common error caused by Visual C++ Redistribute is“MSBUILD : error MSB4132: The tools version “2.0”

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CloudFlare IP Whitelist

Some applications, such as ConfigServer Security & Firewall (csf), need to know which IPs are used by CloudFlare, thus preventing our server from blocking CloudFlare. Below are two lists containing CloudFlare’s IPv4 and IPv6 ranges. IPv4 list: 103.21.244.0/22 103.22.200.0/22 103.31.4.0/22 104.16.0.0/12 108.162.192.0/18 131.0.72.0/22 141.101.64.0/18 162.158.0.0/15 172.64.0.0/13 173.245.48.0/20 188.114.96.0/20 190.93.240.0/20 197.234.240.0/22 198.41.128.0/17 https://www.cloudflare.com/ips-v4 IPv6 list: 2400:cb00::/32

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