am a new FreeBSD server user and moved from netfilter on Linux. How do I setup a firewall with PF on FreeBSD server to protect a web server with single public IP address and interface?
alware is becoming more and more common for macOS. I wanted to make sure file I downloaded files such as an ISO image or firmware are safe before install on my system. How do I verify md5 or sha1 or sha256 checksums for my Apple MacOS X when I download files from the Internet?
am a new Debian Linux version 9 server user. How do I setup an OpenVPN Server on Debian Linux version 9.x or 8.x server to shield my browsing activity from bad guys on public Wi-Fi, and more?
ow do I keep my server/cloud computer powered by Debian Linux 9.x or 8.x current with the latest security updates automatically? Is there is a tool to update security patched automatically?
How do I use Tinc to create a mesh network of two different VPN on the same server? Is it possible to create multiple VPN tunnels between two hosts using tinc VPN software?
very serious security problem has been found in the Linux kernel called “The Stack Clash.” It can be exploited by attackers to corrupt memory and execute arbitrary code. An attacker could leverage this with another vulnerability to execute arbitrary code and gain administrative/root account privileges. How do I fix this problem on Linux?
want to restrict both normal users and root user inside LXD container “hypervisor” from viewing and using dmesg command output. How do I prevent non-root (unprivileged) Linux users from viewing the Linux kernel’s log buffer?