If set to B<true>, the options B<TLSCertFile>, B<TLSKeyFile> and B<TLSCAFile>
are I<required>.
+=item B<TLSDHBits> I<Num>
+
+Sets the number of bits used for I<Diffie-Hellman> (DH) key generation. By
+default, the number of bits of the server's I<public key> is used, i.e. if
+you're using a certificate with a 4096E<nbsp>bit RSA key, then 4096E<nbsp>bit
+will be used for DH as well. Don't change this setting unless you know what
+you're doing.
+
=back
=head2 Plugin C<netlink>