Sagan low stable other

[COURIER] Authentication failure

[COURIER] Authentication failure

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Detection Logic

alert any $EXTERNAL_NET any -> $HOME_NET any (msg: "[COURIER] Authentication failure"; content: "LOGIN FAILED,"; parse_src_ip: 1; default_proto: tcp; classtype: unsuccessful-user; program: imapd
| imapd-sslcourierlogger; sid:5000259; rev:4;)

Field Validations

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