Rule History

SID: 2003003 • Source: et/open

Versions (3)

Version DetailsCurrent

Rev: 8 • Jul 30, 2010, 12:00 PM

Message:

ET POLICY TLS/SSL Client Hello on Unusual Port SSLv3

Rule:

alert tcp $HOME_NET any -> $EXTERNAL_NET 1024:65535 (msg:"ET POLICY TLS/SSL Client Hello on Unusual Port SSLv3"; flowbits:isnotset,BS.SSL.Known.Port; flowbits:isnotset,BS.SSL.Client.Hello; flow:established,to_server; content:"|16 03 00|"; depth:3; content:"|01|"; within:2; content:"|03 00|"; within:3; flowbits:set,BS.SSL.Client.Hello; flowbits:noalert; classtype:unusual-client-port-connection; sid:2003003; rev:8; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2019_07_26;)

Created:

Jul 30, 2010, 12:00 PM

Updated:

Jul 26, 2019, 12:00 PM

DB Created:

Sep 21, 2024, 3:00 AM

DB Updated:

May 30, 2025, 12:04 AM

Filename:

rules/emerging-policy.rules