# mv /var/lib/aide/aide.db.new.gz /var/lib/aide/aide.db.gz Then rename the database to /var/lib/aide/aide.db.gz before proceeding, using this command. The command below will create a database that contains all of the files that you selected in your configuration file. This is expected to be done before your system is connected to a network. Start by constructing a database against the checks that will be performed using -init flag. etc/ DATAONLYĬonfigure Aide Rules for Filesystem Using AIDE to Check File and Directory Integrity in Linux To help you detect any changes in data inside all files/directory under /etc/, use this. This will check all files in the /root directory for any changes. Considering the PERMS rule above, this definition will check permissions for all files in root directory. Once you have defined rules, you can specify the file and directories to watch. DATAONLY = p+n+u+g+s+acl+selinux+xattrs+sha256Ĭonfigure Aide Rules Defining Rules to Watch Files and Directories The DATAONLY rule below will help detect any changes in data inside all files/directory. CONTENT_EX = sha256+ftype+p+u+g+n+acl+selinux+xattrs This is an extended version of the previous rule, it checks extended content, file type and access. This will only check file content and file type. The PERMS rule is used for access control only, it will detect any changes to file or directories based on file/directory permissions, user, group, access control permissions, SELinux context and file attributes. Using the above default rules, you can define new custom rules in the nf file for example. Understanding Default Aide Rules AIDE Default Rules It has directives that define the database location, report location, default rules, the directories/files to be included in the database. You can open the configuration using your favorite editor. To view the installed version as well as compile time parameters, run the command below on your terminal: # aide -v # apt install aide Īfter installing it, the main configuration file is /etc/nf. How to Install AIDE in LinuxĪide is packaged in official repositories of mainstream Linux distributions, to install it run the command for your distribution using a package manager. This guide will show how to install and use aide in Linux. Once this database is initialized, you can verify the integrity of the system files against it. It is feature-rich: uses plain text configuration files and database making it easy to use supports several message digest algorithms such as but not limited to md5, sha1, rmd160, tiger supports common file attributes also supports powerful regular expressions to selectively include or exclude files and directories to be scanned.Īlso it can be compiled with exceptional support for Gzip compression, Posix ACL, SELinux, XAttrs and Extended file system attributes.Īide works by creating a database (which is simply a snapshot of selected parts of the file system), from the regular expression rules defined in the configuration file(s). It is an independent static binary for simplified client/server monitoring configurations. In our mega guide to hardening and securing CentOS 7, under the section “ protect system internally”, one of the useful security tools we listed for internal system protection against viruses, rootkits, malware, and detection of unauthorized activities is AIDE.ĪIDE ( Advanced Intrusion Detection Environment) is a small yet powerful, free open source intrusion detection tool, that uses predefined rules to check file and directory integrity in Unix-like operating systems such as Linux.
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