Linux – StrangerPing.Com

How to Unban an IP from Fail2Ban: Step-by-Step Guide

June 4, 2024 by Jicé

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

Configuring Apache and HAProxy to Record Clients’ Real IP Addresses

June 3, 2024 by Jicé

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

Implementing Wildcard SSL/TLS Certificates with OVH and Let’s Encrypt

June 3, 2024May 26, 2024 by Jicé

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

How to install and configure NFS Server and Client

May 26, 2024 by Jicé

The NFS is a system for file sharing over the network.

Here, we will configure an NFS server and a client.

HTTPS-HaProxy

May 26, 2024 by Jicé

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.

Configuration of HaProxy as a reverse proxy

May 26, 2024May 26, 2024 by Jicé

HaProxy is a remarkable tool that notably allows for load balancing or reverse proxying. It’s this latter functionality we will be focusing on.

The goal is to make two different web servers accessible from the same IP address and port via two subdomains.

How to configure HTTPS on Apache2

May 26, 2024 by Jicé

An important step when deploying an Apache2 server is the transition from the HTTP protocol to HTTPS. This allows for the encryption of data between the client and the server to protect its content from being transmitted in plain text over the internet.

How to configure DKIM on Postfix server

May 26, 2024 by Jicé

Setting up DKIM (DomainKeys Identified Mail) on a server is essential for authenticating emails sent from that server. This ensures that the email content has not been altered during transit.

Separating and Sorting Postfix and Dovecot Logs with Rsyslog

May 26, 2024 by Jicé

I encountered a rather constraining issue for sticklers like me; I have my mail server hosting Postfix and Dovecot duo. The logs are respectively distributed in /var/log/mail.log for Postfix and /var/log/mail.log for Dovecot. Problem is, when sending these logs via Rsyslog to the receiving server, I ended up with a concatenation of both files into one. Let’s discover the solution to this problem together!

Running a script with Crontab by a user

May 26, 2024 by Jicé

For certain needs, it may be necessary to execute a script via crontab by a user other than root. In this tutorial, I will use www-data because my script will be related to my Apache server.