Cisco ASA/PIX config for logstash.

gistfile1.txt

/etc/logstash/logstash.conf :

   # We handle the syslog part of the Cisco PIX/ASA messages
   grok {
      tags => "cisco-fw"
      patterns_dir => "/etc/logstash/patterns"
      pattern => "^<%{POSINT:syslog_pri}>(?:(%{TIMESTAMP_ISO8601:timestamp8601} |%{CISCOTIMESTAMP:timestamp} ))?%{SYSLOGHOST:logsource}?[ :]+%{GREEDYDATA:syslog_message}"
   }
   syslog_pri {
      tags => "cisco-fw"
   }
   mutate {
      tags => "cisco-fw"
      exclude_tags => "_grokparsefailure"
      replace => [ "@source_host", "%{logsource}" ]
      replace => [ "@message", "%{syslog_message}" ]
   }
  # for optional fields (device name in message, Cisco syslog tag)
  grok {
    tags => "cisco-fw"
    patterns_dir => "/etc/logstash/patterns"
    pattern => "(?:%{SYSLOGHOST:device} )?(?:: )?%%{CISCOFWTAG:ciscotag}:%{GREEDYDATA}"
  }

  # we extract fields
  grok {
    tags => "cisco-fw"
    break_on_match => false
    patterns_dir => "/etc/logstash/patterns"
    pattern => [
    "%{CISCOFW1}",
    "%{CISCOFW2}",
    "%{CISCOFW3}",
    "%{CISCOFW4}",
    "%{CISCOFW4b}",
    "%{CISCOFW5}",
    "%{CISCOFW6a}",
    "%{CISCOFW6b}",
    "%{CISCOFW7}",
    "%{CISCOFW8}",
    "%{CISCOFW9}",
    "%{CISCOFW10}",
    "%{CISCOFW11}",
    "%{CISCOFW12}",
    "%{CISCOFW13}",
    "%{CISCOFW14}",
    "%{CISCOFW15}",
    "%{CISCOFW16}",
    "%{CISCOFW17}",
    "%{CISCOFW18}"
    ]
  }

  date {
    tags => "cisco-fw"
    timestamp8601 => ISO8601
    timestamp => [
    "MMM dd HH:mm:ss.SSS",
    "MMM  d HH:mm:ss.SSS",
    "MMM dd HH:mm:ss",
    "MMM  d HH:mm:ss",
    "MMM dd yyyy HH:mm:ss.SSS",
    "MMM  d yyyy HH:mm:ss.SSS",
    "MMM dd yyyy HH:mm:ss",
    "MMM  d yyyy HH:mm:ss"
    ]
    innertimestamp => [
    "MMM dd HH:mm:ss.SSS",
    "MMM  d HH:mm:ss.SSS",
    "MMM dd HH:mm:ss",
    "MMM  d HH:mm:ss",
    "MMM dd yyyy HH:mm:ss.SSS",
    "MMM  d yyyy HH:mm:ss.SSS",
    "MMM dd yyyy HH:mm:ss",
    "MMM  d yyyy HH:mm:ss",
    "yyyy-MM-dd HH:mm:ss.SSS",
    "yyyy-MM-dd HH:mm:ss"
    ]

    locale => "Locale.US"
  }


/etc/logstash/patterns/cisco-firewalls :
# ASA-1-106100
CISCOFW1 access-list %{DATA:policy_id} %{WORD:action} %{WORD:protocol} %{DATA}/%{IP:src_ip}\(%{DATA:src_port}\) -> %{DATA}/%{IP:dst_ip}\(%{DATA:dst_port}\)
# ASA-3-710003
CISCOFW2 %{WORD:action} %{WORD:protocol} type=%{INT}, code=%{INT} from %{IP:src_ip} on interface
# ASA-3-710003
CISCOFW3 %{WORD:protocol} access %{WORD:action} by ACL from %{IP:src_ip}/%{DATA:src_port} to %{DATA}:%{IP:dst_ip}/%{DATA:dst_port}
# ASA-4-106023
CISCOFW4 %{WORD:action} %{WORD:protocol} src %{DATA}:%{IP:src_ip}/%{DATA:src_port} dst %{DATA}:%{IP:dst_ip}/%{DATA:dst_port} by access-group %{DATA:policy_id}
CISCOFW4b %{WORD:action} %{WORD:protocol} src %{DATA}:%{IP:src_ip} dst %{DATA}:%{IP:dst_ip} \(type %{INT}, code %{INT}\) by access-group %{DATA:policy_id}
# ASA-6-106015
CISCOFW5 Deny %{WORD:protocol} \(%{GREEDYDATA:action}\) from %{IP:src_ip}/%{DATA:src_port} to %{IP:dst_ip}/%{DATA:dst_port} flags
# ASA-6-302013
CISCOFW6a %{WORD:action} inbound %{WORD:protocol} connection %{INT} for %{DATA}:%{IP:src_ip}/%{DATA:src_port} \(%{IP:src_xlated_ip}/%{DATA:src_xlated_port}\) to %{DATA}:%{IP:dst_ip}/%{DATA:dst_port} \(%{IP:dst_xlated_ip}/%{DATA:dst_xlated_port}\)
CISCOFW6b %{WORD:action} outbound %{WORD:protocol} connection %{INT} for %{DATA}:%{IP:dst_ip}/%{DATA:dst_port} \(%{IP:dst_xlated_ip}/%{DATA:dst_xlated_port}\) to %{DATA}:%{IP:src_ip}/%{DATA:src_port} \(%{IP:src_xlated_ip}/%{DATA:src_xlated_port}\)
# ASA-7-710002 | ASA-7-710005
CISCOFW7 %{WORD:protocol} (?:request|access) %{WORD:action} from %{IP:src_ip}/%{DATA:src_port} to %{DATA}:%{IP:dst_ip}/%{WORD:service}
# ASA-6-302020
CISCOFW8 %{WORD:action} (?:inbound|outbound) %{WORD:protocol} connection for faddr %{IP:dst_ip}/%{INT} gaddr %{IP:src_xlated_ip}/%{INT} laddr %{IP:src_ip}
# ASA-1-106021
CISCOFW9 %{WORD:action} %{WORD:protocol} reverse path check from %{IP:src_ip} to %{IP:dst_ip} on interface
# ASA-2-106006-7
CISCOFW10 %{WORD:action} inbound %{WORD:protocol} from %{IP:src_ip}/%{DATA:src_port} to %{IP:dst_ip}/%{DATA:dst_port} (?:on interface|due to)
# ASA-4-313004
CISCOFW11 %{WORD:action} %{WORD:protocol} type=%{INT}, from (?:laddr )?%{IP:src_ip} on interface %{DATA} to %{IP:dst_ip}
# ASA-2-106001
CISCOFW12 (?:Inbound|Outbound) %{WORD:protocol} connection %{WORD:action} from %{IP:src_ip}/%{DATA:src_port} to %{IP:dst_ip}/%{DATA:dst_port} flags
# ASA-3-106014
CISCOFW13 %{WORD:action} (?:inbound|outbound) %{WORD:protocol} src %{DATA}:%{IP:src_ip} dst %{DATA}:%{IP:dst_ip}
# ASA-4-419001
CISCOFW14 %{WORD:action} %{WORD:protocol} packet from %{DATA}:%{IP:src_ip}(?:/%{DATA:src_port})? to %{DATA}:%{IP:dst_ip}(?:/%{DATA:dst_port})?
# ASA-4-313005
CISCOFW15 %ASA-4-313005: %{DATA:action} for %{WORD:protocol} error message: %{WORD} src %{DATA}:%{IP:src_ip} dst %{DATA}:%{IP:dst_ip} (?:\(type %{INT}, code %{INT}\))
# PIX-3-710003
CISCOFW16 %{WORD:protocol} access %{WORD:action} by ACL from %{IP:src_ip}/%{DATA:src_port} to %{DATA}:%{IP:dst_ip}/%{WORD:service}
# ASA-4-500004
CISCOFW17 %{WORD:action} transport field for protocol=%{WORD:protocol}, from %{IP:src_ip}/%{DATA:src_port} to %{IP:dst_ip}/%{DATA:dst_port}
# ASA-6-305011 # dynamic NAT creation
#CISCOFW00 %{WORD:action} dynamic %{WORD:protocol} translation from %{DATA}:%{IP:src_ip}/%{DATA:src_port} to %{DATA}:%{IP:src_xlated_ip}/%{DATA:src_xlated_port}
# ASA-5-305013
CISCOFW18 Connection for %{WORD:protocol} src %{DATA}:%{IP:src_ip} dst %{DATA}:%{IP:dst_ip} (?:\(type %{INT}, code %{INT}\) )?%{WORD:action} due to


/etc/logstash/patterns/cisco-std :
CISCOTIMESTAMP %{MONTH} +%{MONTHDAY}(?: %{YEAR})? %{TIME}
CISCOTAG [A-Z0-9]+-%{INT}-(?:[A-Z0-9_]+)
CISCOFWTAG (?:ASA|PIX|FWSM)-%{INT}-(?:[A-Z0-9_]+)

Dav3860,

When using this filter in my central.conf for the ASA in Logstash It replaces my logsource with the month instead of the host. I can send you a copy of my central.conf if it would help troubleshoot the issue. Otherwise this works great.!!! Nice Work... Email is cody.betsworth@gmail.com.

Thank you for getting me started along this path. I have used these patterns as a starting point, tweaked them, added some more message types, and got it merged into LogStash core: elastic/logstash#610

@GregMefford Hi Greg. I know it's been years since the above post, but I'd love to find out where those message types ended up, as I can't quite seem to follow how they've moved/merged/refactored over the years. I'm using Graylog (which supports grok log patterns) as opposed to log stash, but the fundamentals are the same. Any idea?

IGNORE THIS: I've since found a good set at: https://grokdebug.herokuapp.com/patterns#