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Disable DNS Server The 'named' service can be disabled with the following command: '$ sudo systemctl disable named'

Uninstall bind Package To remove the 'bind' package, which contains the 'named' service, run the following command: '$ sudo yum erase bind'

Disable vsftpd Service The 'vsftpd' service can be disabled with the following command: '$ sudo systemctl disable vsftpd'

Uninstall vsftpd Package The 'vsftpd' package can be removed with the following command: '$ sudo yum erase vsftpd'

Enable Logging of All FTP Transactions Add or correct the following configuration options within the 'vsftpd' configuration file, located at '/etc/vsftpd/vsftpd.conf': xferlog_enable=YES xferlog_std_format=NO log_ftp_protocol=YES

Create Warning Banners for All FTP Users Edit the vsftpd configuration file, which resides at '/etc/vsftpd/vsftpd.conf' by default. Add or correct the following configuration options: 'banner_file=/etc/issue'

Disable Mounting of cramfs To configure the system to prevent the 'cramfs' kernel module from being loaded, add the following line to a file in the directory '/etc/modprobe.d':

Restrict Access to Anonymous Users if Possible Is there a mission-critical reason for users to transfer files to/from their own accounts using FTP, rather than using a secure protocol like SCP/SFTP? If not, edit the vsftpd configuration file. Add or correct the following configuration option: 'local_enable=NO' If non-anonymous FTP logins are necessary, follow the guidance in the remainder of this ...

Disable FTP Uploads if Possible Is there a mission-critical reason for users to upload files via FTP? If not, edit the vsftpd configuration file to add or correct the following configuration options: 'write_enable=NO' If FTP uploads are necessary, follow the guidance in the remainder of this section to secure these transactions as much as possible.

Disable httpd Service The 'httpd' service can be disabled with the following command: '$ sudo systemctl disable httpd'


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