* sample filters

docs/filters/asterisk.preg

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+SECURITY.* SecurityEvent="FailedACL".*RemoteAddress="IPV[46]/[TU][CD]P/<HOST>/[0-9]+"
+SECURITY.* SecurityEvent="InvalidAccountID".*RemoteAddress="IPV[46]/[TU][CD]P/<HOST>/[0-9+]+"
+SECURITY.* SecurityEvent="ChallengeResponseFailed".*RemoteAddress="IPV[46]/[TU][CD]P/<HOST>/[0-9]+"
+SECURITY.* SecurityEvent="InvalidPassword".*RemoteAddress="IPV[46]/[TU][CD]P/<HOST>/[0-9]+"

docs/filters/postfix.preg

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+NOQUEUE: reject: RCPT from [[:print:]]+\[<HOST>\]: 454 4\.7\.1 Service unavailable; Client host \[[[:print:]]+\] blocked
+NOQUEUE: reject: RCPT from [[:print:]]+\[<HOST>\]: 554 5\.7\.1 .*
+warning: [[:print:]]+\[<HOST>\]: SASL [A-Z0-9-]+ authentication failed

docs/filters/ssh.preg

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+[Aa]uthentication failure for .* from <HOST>( via [[:print:]]*)?
+[Aa]uthentication error for .* from <HOST>( via [[:print:]]*)?
+User not known to the underlying authentication module for .* from <HOST>
+refused connect from [[:print:]]+ \(<HOST>\)
+Received disconnect from <HOST>: [0-9]*: [[:print:]]: Auth fail
+Did not receive identification string from <HOST>
+Invalid user [[:print:]]+ from <HOST>
+Connection closed by <HOST> \[preauth\]
+User [[:print:]]+ from <HOST> not allowed because not listed in AllowUsers
+User [[:print:]]+ from <HOST> not allowed because listed in DenyUsers
+User [[:print:]]+ from <HOST> not allowed because not in any group
+User [[:print:]]+ from <HOST> not allowed because a group is listed in DenyGroups
+User [[:print:]]+ from <HOST> not allowed because none of user's groups are listed in AllowGroups