alert tcp any $SSH_PORTS -> any any (msg:"ET INFO SSH Server Banner Detected on Expected Port"; flow:established,to_client; flowbits:set,ET.is_ssh_server_banner; flowbits:noalert; content:"SSH-"; offset:0; depth:4; byte_test:1,>,48,0,relative; byte_test:1,<,51,0,relative; byte_test:1,=,46,1,relative; classtype:misc-activity; sid:2001973; rev:11; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, updated_at 2024_03_15;)