Disable weak ciphers in vnc_tls

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Dear libvirt team,

we a currently in a pci-dss certification process and our security
scanner found weak ciphers in the vlc_tls service on our centos6 box:

When I scan using sslscan I can see that sslv3 and rc4 is accepted:

inf0rmix@tardis:~$ sslscan myhost:16514 | grep Accepted
    Accepted  SSLv3  256 bits  DHE-RSA-AES256-SHA
    Accepted  SSLv3  256 bits  AES256-SHA
    Accepted  SSLv3  128 bits  DHE-RSA-AES128-SHA
    Accepted  SSLv3  128 bits  AES128-SHA
    Accepted  SSLv3  128 bits  RC4-SHA
    Accepted  SSLv3  128 bits  RC4-MD5
    Accepted  SSLv3  112 bits  EDH-RSA-DES-CBC3-SHA
    Accepted  SSLv3  112 bits  DES-CBC3-SHA
    Accepted  TLSv1  256 bits  DHE-RSA-AES256-SHA
    Accepted  TLSv1  256 bits  DHE-RSA-CAMELLIA256-SHA
    Accepted  TLSv1  256 bits  AES256-SHA
    Accepted  TLSv1  256 bits  CAMELLIA256-SHA
    Accepted  TLSv1  128 bits  DHE-RSA-AES128-SHA
    Accepted  TLSv1  128 bits  DHE-RSA-CAMELLIA128-SHA
    Accepted  TLSv1  128 bits  AES128-SHA
    Accepted  TLSv1  128 bits  CAMELLIA128-SHA
    Accepted  TLSv1  128 bits  RC4-SHA
    Accepted  TLSv1  128 bits  RC4-MD5
    Accepted  TLSv1  112 bits  EDH-RSA-DES-CBC3-SHA
    Accepted  TLSv1  112 bits  DES-CBC3-SHA

how do we turn it off and only allow tlv>=1.1

Kind regards,
Matthias Fenner

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