%{SSL_PROTOCOL}x %{SSL_CIPHER}x - question

hi there,

recently I turned on the SSL_PROTOCOL & SSL_CIPHER on one of our
web server to gather some statistics on the SSL protocol & ciphers
being used.

most of the entries have SSLv3, TLSv1, some SSLv2s here and there
and then there are these entries with only a "-" & "-" in place where
the SSL_PROTOCOL & SSL_CIPHER should be.

for eg:

XX.XX.83.98 - - [XX/XX/2007:13:31:27 -0500] SSLv3 RC4-MD5 "GET XX
HTTP/1.0" 404 363 "XX" "XX"
XX.XX.83.98 - - [XX/XX/2007:13:31:51 -0500] - - "GET /" 400 596 "-" "-"
XX.XX.83.98 - - [XX/XX/2007:13:32:21 -0500] - - "GET /" 400 596 "-" "-"

my question is what does the "-" & "-" represent in the
SSL_PROTOCOL & SSL_CIPHER fields respectively.

I searched the posting archives, the FAQs & a look at the
documentation, but am not able to find anything related.

any help or information would be much appreciated.

thanks,

- Shiva
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