Reverse proxy is very useful when We need Load balancing web requests or ensure our web servers for possible attacks. The operation of reverse proxy is simple, acts as intermediary between the web browser requests and the real web server
Preventing brute force attacks with Fail2ban
Fail2ban help our servers to prevent the brute force attacks scanning the log files to find fail authentication attempts. Software like hydra http://www.thc.org/thc-hydra/ can attempt to login in service that require authentication like telnet, ssh, http, ftp, etc… trying with
Basic guide to manage LVM
With LVM we can manage our partition of a easy and flexible way. For this guide I’ll use three disk of 340 GB, 90 GB and 160 GB. With this basic guide We’ll create a simple group, add or remove
Managing RAID in Linux
In this article I’ll show the various raid levels of a practice way and the basic manage to add or remove disks to our raid device. First of all we have to partition our hard disk with the type of
Configuring PEAP authentication with FreeRADIUS
PEAP (Protected Extensible Authentication Protocol) is an authentication method based in two simple steps: The client establishes a TLS session with the server. The server authenticates the client over the same digital certified with a RADIUS server. This allows EAP
Load balancing with IPVS + Keepalived
IPVS implements load balancing for level transport inside Linux kernel. Running as frontend balancing the request from the clients to the backend servers using different methods of forwarding and load balance algorithms. Basically supports three methods of package forwarding: NAT
Configuring an IMAP/POP Proxy with perdition and MySQL
Perdition is an IMAP/POP proxy written in C, and it offers map user connections to another mail servers where store the email inbox. The clients will connect to perdition server and this will distribute the connections to the corresponding server.
Configuring a failover cluster with heartbeat + pacemaker
Heartbeat is a daemon that provide services of clustering, this allows the exchange of messages between the machines running Heartbeat and check the health of them. On this post I’ll show the configuration of a simple cluster with failover and sharing
Configuring Nagios (Part II)
Nagvis is an Addon for nagios that allow create our own maps with the nagios information services. The classical method to collect services data from Nagios is reading the file status.dat, this file is updated every 10 seconds by default
Configuring Nagios (Part I)
Nagios is a popular system monitor that offers monitoring and alerting servers, applications, services, network devices… It’s very modular and multiplatform, because the core of nagios is the processor of the output of the plugins that can be developed in