How can I harden /etc/sysctl.conf and disable ICMP broadcast requests? Core

Ping is the most basic method of determining whether a server is reachable over the internet. Ping works by sending ICMP echo request packets to the destination host and waiting for an ICMP broadcast requests echo response. It’s only used for troubleshooting and testing. When there isn’t a need for it, you must disable it.... Continue Reading Continue Reading

How can root login and password authentication for SSH be disabled? Core

The root user is enabled by default on most Linux servers, and hackers frequently attempt to get access to it by guessing its password. As a result, it’s a good idea to turn off the root account. First, make sure you have an admin user account so you can use the sudo special privileges access... Continue Reading Continue Reading


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