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[VPOPMAIL] Authentication failure for POP3 service

[VPOPMAIL] Authentication failure for POP3 service

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Detection Logic

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[VPOPMAIL] Authentication failure for POP3 service"; content: "password fail"; default_proto: tcp; default_dst_port: $POP3_PORT; classtype: unsuccessful-user; program: vpopmail; sid: 5000211; rev:4;)

Field Validations

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