When the server can’t write to the session data directory, if will use /var/cache/nginx/fastcgi_temp/ and complain in the error log. You don’t want any of these errors, but a setting considered insecure will not even be reported as such. Here is how to bolster your PHP 7 session security with NGINX and php-fpm.
How to set up remote access via SFTP to a web server root directory on RHEL/CentOS/Fedora using key pairs
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.
How to get a grip on your log files growing outta control: set up and force logrotate
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.
A fatal flaw in TCP on Linux hijacks HTTPS connections. Here is the fix
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.
Optimizing Postfix access maps to block incoming spam based on sender’s address
Here is how you can improve your Postfix access maps in order to block incoming spam based on sender’s address.
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