Sometimes you need to remove a node from a Proxmox cluster, whether it’s to reassign it to another use, resolve configuration issues, or simply reorganize your infrastructure. Here’s how to proceed properly. I tested this procedure on Proxmox VE 7.x and 8.x. It allows you to remove a specific node from the cluster without affecting … Read more

Whether you’re a beginner or experienced system administrator, knowing how to format and mount a new disk in Linux is an essential skill. This tutorial will guide you step by step through the complete process, from disk identification to permanent mounting. I tested this tutorial on a Debian virtual machine and encountered no particular issues. … Read more

Sometimes, it may be necessary to unban an IP from Fail2Ban. Here is a tutorial explaining the procedure to follow. After a brief review of the logs, you will see which event banned the client’s address. First, we will list the jails: My Haproxy logs showed an SSL attack. To confirm that the client’s address … Read more

When hosting an Apache server behind an HAProxy, the server receives requests from the WAN through HAProxy. This method can pose a problem because your web server sees the proxy’s IP address for each request, making the logs almost unusable, and any WordPress security plugin might ban the proxy’s local address instead of the attacker’s … Read more

In today’s digital ecosystem, website security is paramount. The use of SSL/TLS certificates encrypts communications between users and servers, ensuring the confidentiality and integrity of exchanged data. A wildcard certificate, in particular, provides the flexibility to secure a primary domain and all its subdomains, making it indispensable for businesses with extensive and diversified web presence. … Read more

When you make a certificate request via certbot, you can declare multiple subdomains for the same certificate. Once your certificate is generated, you will need to merge the certificate and the key.