Couldn’t Load the DH Parameters File

Issue: Restarting pure-ftpd in a CentOS based, cPanel server displays the following error message, and some clients are having FTP connectivity issues:

(?@?) [DEBUG] Couldn’t load the DH parameters file /etc/ssl/private/pure-ftpd-dhparams.pem

Solution: Generate the dhparam file (Diffie–Hellman (D-H)), and restart the FTP server.

SSH into server and execute the following commands:

openssl dhparam -out /etc/ssl/private/pure-ftpd-dhparams.pem 2048
/scripts/restartsrv_pureftpd

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