CasperSecurity
# failJSON: { "time": "2005-02-16T23:33:20", "match": true , "host": "190.5.230.178" }
Feb 16 23:33:20 smtp1 sm-mta[5133]: s1GNXHYB005133: [190.5.230.178]: possible SMTP attack: command=AUTH, count=5
# failJSON: { "time": "2005-02-16T23:40:36", "match": true , "host": "75.176.164.191" }
Feb 16 23:40:36 smtp1 sm-mta[5178]: s1GNeNqe005178: cpe-075-176-164-191.sc.res.rr.com [75.176.164.191]: possible SMTP attack: command=AUTH, count=5
# failJSON: { "time": "2005-02-24T12:10:15", "match": true , "host": "211.75.6.133" }
Feb 24 12:10:15 kismet sm-acceptingconnections[32053]: s1OHA28u032053: 211-75-6-133.HINET-IP.hinet.net [211.75.6.133]: possible SMTP attack: command=AUTH, count=6
# failJSON: { "time": "2005-02-24T13:00:17", "match": true , "host": "95.70.241.192" }
Feb 24 13:00:17 kismet sm-acceptingconnections[1499]: s1OHxxSn001499: 192.241.70.95.dsl.static.turk.net [95.70.241.192] (may be forged): possible SMTP attack: command=AUTH, count=6
# gh-1632, Fedora 24/RHEL - the daemon name is "sendmail":
# failJSON: { "time": "2005-02-24T14:00:00", "match": true , "host": "192.0.2.1" }
Feb 24 14:00:00 server sendmail[26592]: u0CB32qX026592: [192.0.2.1]: possible SMTP attack: command=AUTH, count=5
# failJSON: { "time": "2005-02-24T14:00:01", "match": true , "host": "192.0.2.2", "desc": "long PID, ID longer as 14 chars (gh-2563)" }
Feb 24 14:00:01 server sendmail[3529566]: xA32R2PQ3529566: [192.0.2.2]: possible SMTP attack: command=AUTH, count=5
# failJSON: { "time": "2005-02-25T04:02:27", "match": true , "host": "192.0.2.3", "desc": "sendmail 8.16.1, AUTH_FAIL_LOG_USER (gh-2757)" }
Feb 25 04:02:27 relay1 sendmail[16664]: 06I02CNi016764: AUTH failure (LOGIN): authentication failure (-13) SASL(-13): authentication failure: checkpass failed, user=user@example.com, relay=example.com [192.0.2.3] (may be forged)
# failJSON: { "time": "2005-02-25T04:02:28", "match": true , "host": "192.0.2.4", "desc": "injection attempt on user name" }
Feb 25 04:02:28 relay1 sendmail[16665]: 06I02CNi016765: AUTH failure (LOGIN): authentication failure (-13) SASL(-13): authentication failure: checkpass failed, user=criminal, relay=[192.0.2.100], relay=[192.0.2.4] (may be forged)