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28 lines
747 B
Text
28 lines
747 B
Text
##! Provides an example of using the metrics framework to collect the number
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##! of times a specific server name indicator value is seen in SSL session
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##! establishments. Names ending in google.com are being filtered out as an
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##! example of the predicate based filtering in metrics filters.
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@load base/frameworks/metrics
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@load base/protocols/ssl
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redef enum Metrics::ID += {
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SSL_SERVERNAME,
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};
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event bro_init()
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{
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Metrics::add_filter(SSL_SERVERNAME,
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[$name="no-google-ssl-servers",
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$pred(index: Metrics::Index) = {
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return (/google\.com$/ !in index$str);
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},
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$break_interval=10secs
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]);
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}
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event SSL::log_ssl(rec: SSL::Info)
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{
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if ( rec?$server_name )
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Metrics::add_data(SSL_SERVERNAME, [$str=rec$server_name], 1);
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}
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