Post by sabbirislam258 on Feb 14, 2024 4:06:32 GMT -5
As practice has shown, it is possible to provide more or less complete protection of the server under the control of the Linux system only with the involvement of the means and results of a clear recording of the events taking place. This especially applies to the user authentication system, which is the most vulnerable place for attackers to attack. Service information accumulated in authentication logs allows for constant monitoring of user visits and attempts to connect to the system, and even to organize its reliable protection in automatic mode. How it can be done - read on. Authentication logs - types and role in server protection Linux systems have quite powerful logging capabilities for all states and events occurring in the system. Any of the magazines can be assigned to one of the categories: For applications; Messages; For services; Systemic.
The content of each of the logs is distributed among several files, according to the Bulgaria Telemarketing Data direction of each of the pieces of information, which are usually stored in the /var/log directory . Such a structure contributes to a more effective arrangement and search of the necessary data for both the system and the Administrator. Authentication logging is carried out using the systemd-journal system log , which records various information about any connection attempts and all visits to the system by registered users. In particular, it can be the following data: Time and date of visit or connection attempts; Successful and unsuccessful connection attempts; Authentication mechanisms used at login; The IP address from which the connection was made or attempted; Name and last activity of each registered user.
The main logs of the Ubuntu OS and their purpose, which are used for authentication purpose ecording of all connection attempts and the authentication method used; /var/log/lastlog – record the last sessions of each user– failed connection attempts are registered binary log for registering failed attempts; /etc/log/wtmp is a binary log where the most recent visitors are registered. It should be noted that the system records connection attempts not only of physical users, but also of any software tool, script or protocol, which is quite understandable. The collected information can be used by Administrators to control visits, analyze and make appropriate decisions regarding system protection in manual or automatic mode. For example, it can be blocking unknown IP addresses from which numerous connection attempts have been made or setting stricter values of authentication parameters, for example, limiting the authentication time or the number of allowable attempts.
The content of each of the logs is distributed among several files, according to the Bulgaria Telemarketing Data direction of each of the pieces of information, which are usually stored in the /var/log directory . Such a structure contributes to a more effective arrangement and search of the necessary data for both the system and the Administrator. Authentication logging is carried out using the systemd-journal system log , which records various information about any connection attempts and all visits to the system by registered users. In particular, it can be the following data: Time and date of visit or connection attempts; Successful and unsuccessful connection attempts; Authentication mechanisms used at login; The IP address from which the connection was made or attempted; Name and last activity of each registered user.
The main logs of the Ubuntu OS and their purpose, which are used for authentication purpose ecording of all connection attempts and the authentication method used; /var/log/lastlog – record the last sessions of each user– failed connection attempts are registered binary log for registering failed attempts; /etc/log/wtmp is a binary log where the most recent visitors are registered. It should be noted that the system records connection attempts not only of physical users, but also of any software tool, script or protocol, which is quite understandable. The collected information can be used by Administrators to control visits, analyze and make appropriate decisions regarding system protection in manual or automatic mode. For example, it can be blocking unknown IP addresses from which numerous connection attempts have been made or setting stricter values of authentication parameters, for example, limiting the authentication time or the number of allowable attempts.