Categorize SSL traffic by version, display as graph

Problem this snippet solves:

You want to know how much SSLv3 traffic is hitting your site. Example image when going to https://x.x.x.x/sslversions:

How to use this snippet:

Attach this iRule to your virtual server that is terminating SSL. It will collect statistics about which versions of SSL are being negotiated with clients. Use the 'istats dump' command to see the statistics. Or, connect to your virtual server and query for "/sslversions" to see a javascript graph.

Code :

when CLIENTSSL_HANDSHAKE {
        ISTATS::incr "ltm.virtual [virtual name] c [SSL::cipher version]" 1
    }
when HTTP_REQUEST {
        if { [string tolower [HTTP::uri]] equals "/sslversions" } {
            set v3 [ISTATS::get "ltm.virtual [virtual name] c SSLv3"]
            set t10 [ISTATS::get "ltm.virtual [virtual name] c TLSv1"]
            set t11 [ISTATS::get "ltm.virtual [virtual name] c TLSv1.1"]
            set t12 [ISTATS::get "ltm.virtual [virtual name] c TLSv1.2"]
            set hbody "\n \
  \n \
    \n \
    \n \
    \n \
  \n \
\n \
  \n \
    \n \
    
\n \
  \n \
\n \
"
            HTTP::respond 200 content $hbody
        }
    }