Security 11

Tutorials, tricks and tips for Linux system administration relating to security of linux servers, websites and general best practices.
 

Iptables Introduction and Examples

Iptables is a firewall service included in CentOS, in CentOS 7 its offered as a alternative firewalld is offered as well. Iptables uses netfilter to filter chains. Essentially you create a chain of filter rules to process how incoming and outgoing data is handled. You can view more about iptables on Netfilter Iptables rule format […]

8 years ago More
 

ModSecurity Installation With Apache On CentOS

ModSecurity is an open source monitoring system for web applications. It has powerful rule sets that allow you to protect applications from attacks.  View the project for more details. It provides a ton of features such as: More than 16,000 specific rules, broken out into the following attack categories: * SQL injection * Cross-site Scripting (XSS) […]

8 years ago 1 More
 

mod_auth_token Installation In Apache

mod_auth_token is a apache module that can be used to sign URLs,  using this it can create time based urls that expire after a certain amount of time. It will prevent hot linking as the URLs will expire. This is particularly useful with video and image sharing. To get started you will need to have […]

8 years ago More
 

Linux Access Control Lists

ACLs (Access control lists) are a security feature which can expand or restrict permissions on files and directories in a linux file system. Redhat/CentOS 7 use xfs by default and are automatically configured with ACLs however if you are using 6 or below or a different filesystem format you will need to mount the file […]

8 years ago More