Cyber security, infotech
Your users want to access a web server instance as a staging or production environment for DevOps… They want access to the web server document root of the sites they manage. Your job is to maintain the integrity of the whole system in terms of cyber security.
If you happen to be running a web server on Linux—for example in EC2 on Amazon AWS—and need to provide site owners remote access in a secure and responsible manner, here is how to do it.
In a research paper titled “Majority is not Enough: Bitcoin Mining is Vulnerable“, Professor Emin Gün Sirer and Dr. Ittay Eyal of the Department of Computer Science at Cornell University, revealed the Selfish Mining attack on Bitcoin’s blockchain back in 2014.
In this interview, Professor Sirer and Dr. Ittay Eyal demystify Bitcoin and other crypto currencies and provide a first glimpse into the blockchain revolution.
The interview was conducted by Anna E Kobylinska with contribution by Filipe Martins.
Logs that grow in size uncontrollably can cause unintended consequences. If you keep ignoring the situation, it will only get worse until you run our of disc space, the system starts being unresponsive or processes begin to crash.
If you are running Linux kernel 3.6 or newer, anyone in the world on a network that allows IP spoofing can hijack your encrypted communications in less than a minute, with a success rate of 90%.
Here is how to fix it.
Here is how you can improve your Postfix access maps in order to block incoming spam based on sender’s address.