A Linux server is by far the most comprehensive solution for web hosting. Compared to Windows, it offers better flexibility at a much lower cost, which is what makes it a popular hosting choice. Linux is known to be the most secure platform out there. However, as with every other platform, there are obvious loopholes in Linux too. If you are server administrator, here are six things you must ensure to enhance the security of your server powered by Linux.
1. Switch on automatic security updates- For some reason, most administrators fail to do this. But it needs to be done to ensure better security. Automatic installation of security updates in Linux can be enabled via a cron script. In case you are worried about compatibility issues, you can always go back to the previous configuration as the old settings are always saved in the archives.
2. Use RSA signed authorization keys- Given the importance of security in a server, this one is vital. It not only holds true for Linux server but other platforms as well. Using password authentication to login to the server has obvious loopholes. An experienced hacker can compromise the password using brute force or some intelligent guesses. A solution to this is using RSA signed authorization keys for logging in to the server. RSA authorization is much more secure than password authentication techniques.
3. Get rid of test accounts- This is a fairly common security error and one with severe ramifications indeed. When a software is in the development stage, it is often tested with the help of test accounts, which often have easy-to-remember passwords. However, very often, the client forgets to delete these test accounts before loading the software on the server. Doing this can have severe consequences in terms of security, something which even the robust security of Linux server cannot prevent. Get rid of them before they cause any damage.
4. Disable errors- A Linux server supports languages such as PHP. A major disadvantage with PHP is that if a website displays an error message and it is made in PHP, then it can give away a lot of sensitive information. This sensitive information can then be used to launch attacks on the server, which can be fatal for the data. A smart thing to do is to disable error messages to prevent sensitive information from being leaked to potential hackers
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