GPL TELNET TELNET login failed

Query · suricata

flow:from_server,established;
content:"Login failed"; nocase;
Raw source GPL TELNET TELNET login failed · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $TELNET_SERVERS 23 -> $EXTERNAL_NET any (
    msg:"GPL TELNET TELNET login failed";
    flow:from_server,established;
    content:"Login failed"; nocase;
    classtype:bad-unknown;
    sid:2100492; rev:10;
    metadata:created_at 2010_09_23, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;
)

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