Ok, I got it it figured out:
1) edit the ../DFM/conf/http.conf.tmpl file and add the following two lines that are indicated in bold, which will only allow encryption cyphers of 256:
...
@@HTTPS_BEGIN@@
...
<VirtualHost_default_:@@HTTPS_PORT@@>>
AddType application/x-x509-ca-cert .crt
AddType application/x-pkcs7-crl .crt
SSLProtocol -all +SSLv3
SSLCipherSuite SSLv3:+HIGH:-MEDIUM:-LOW:-EXP
<IfModule mod_ssl.c>
...
2) stop and restart http service: dfm service stop http; dfm service start http