{"id":242,"date":"2019-05-26T12:45:50","date_gmt":"2019-05-26T04:45:50","guid":{"rendered":"https:\/\/www.theinsecurewire.com\/?p=242"},"modified":"2019-05-26T12:45:50","modified_gmt":"2019-05-26T04:45:50","slug":"elk-stack-with-palo-alto-firewall-using-curator-to-clear-indexes","status":"publish","type":"post","link":"https:\/\/www.insecurewi.re\/index.php\/2019\/05\/26\/elk-stack-with-palo-alto-firewall-using-curator-to-clear-indexes\/","title":{"rendered":"ELK Stack with Palo Alto Firewall &#8211; Using Curator to clear indexes"},"content":{"rendered":"<p>I recently deployed an ELK stack (Elasticsearch, Logstash, Kibana) VM as logger for a Palo Alto Networks firewall. ELK is open source and allows you to create beautiful dashboards in Kibana.<br \/>\nI followed the following guide for integrating PAN firewall with ELK <a href=\"https:\/\/github.com\/sm-biz\/paloalto-elasticstack-viz\/wiki\" rel=\"noopener noreferrer\" target=\"_blank\">palo-alto-elasticstack-viz<\/a>.<\/p>\n<p><a href=\"https:\/\/www.theinsecurewire.com\/wp-content\/uploads\/2019\/05\/overview.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.insecurewi.re\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/www.theinsecurewire.com\/wp-content\/uploads\/2019\/05\/overview-1024x575.png\" alt=\"Overview Dashboard\" width=\"550\" height=\"309\" class=\"alignleft size-large wp-image-243\" data-srcset=\"https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-1024x575.png 1024w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-300x168.png 300w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-768x431.png 768w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-1536x862.png 1536w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-2048x1150.png 2048w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-100x56.png 100w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-700x393.png 700w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/overview-1600x898.png 1600w\" data-sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/a><br \/>\n<a href=\"https:\/\/www.theinsecurewire.com\/wp-content\/uploads\/2019\/05\/threat.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.insecurewi.re\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/www.theinsecurewire.com\/wp-content\/uploads\/2019\/05\/threat-1024x577.png\" alt=\"Threat Dashboard\" width=\"550\" height=\"310\" class=\"alignright size-large wp-image-244\" data-srcset=\"https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-1024x577.png 1024w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-300x169.png 300w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-768x433.png 768w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-1536x865.png 1536w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-2048x1153.png 2048w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-100x56.png 100w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-700x394.png 700w, https:\/\/www.insecurewi.re\/wp-content\/uploads\/2019\/05\/threat-1600x901.png 1600w\" data-sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><\/a><\/p>\n<p>The issue I was having is that Elastic indexes would continue to grow and the VM would eventually run out of disk. To solve this problem I did the following:<\/p>\n<p>1. Change to daily indexes, base on date stamp. Edit logstash config like so (this edit follows on from the <a href=\"https:\/\/github.com\/sm-biz\/paloalto-elasticstack-viz\/blob\/master\/PAN-OS.conf\">above PAN-OS.conf logstash configuration file<\/a>):<br \/>\n<code><br \/>\noutput {<br \/>\n    if \"PAN-OS_Traffic\" in [tags] {<br \/>\n        elasticsearch {<br \/>\n            index => \"panos-traffic-%{+YYYY.MM.dd}\"<br \/>\n            hosts => [\"localhost:9200\"]\n            user => \"elastic\"<br \/>\n            password => \"yourpassword\"<br \/>\n        }<br \/>\n    }<br \/>\n    else if \"PAN-OS_Threat\" in [tags] {<br \/>\n        elasticsearch {<br \/>\n            index => \"panos-threat-%{+YYYY.MM.dd}\"<br \/>\n            hosts => [\"localhost:9200\"]\n            user => \"elastic\"<br \/>\n            password => \"yourpassword\"<br \/>\n        }<br \/>\n    }<br \/>\n    else if \"PAN-OS_Config\" in [tags] {<br \/>\n        elasticsearch {<br \/>\n            index => \"panos-config-%{+YYYY.MM.dd}\"<br \/>\n            hosts => [\"localhost:9200\"]\n            user => \"elastic\"<br \/>\n            password => \"yourpassword\"<br \/>\n        }<br \/>\n    }<br \/>\n    else if \"PAN-OS_System\" in [tags] {<br \/>\n        elasticsearch {<br \/>\n            index => \"panos-system-%{+YYYY.MM.dd}\"<br \/>\n            hosts => [\"localhost:9200\"]\n            user => \"elastic\"<br \/>\n            password => \"yourpassword\"<br \/>\n        }<br \/>\n    }<br \/>\n}<br \/>\n<\/code><br \/>\nLogstash will now create an index based on date stamp for the firewall log inputs.<br \/>\n2. Use Elastic Curator cli tool to create a shell script and run it with crontab:<br \/>\nCreate \/etc\/curator\/config.yml<br \/>\n<code><br \/>\nclient:<br \/>\n  hosts:<br \/>\n    - 127.0.0.1<br \/>\n  port: 9200<br \/>\n  url_prefix:<br \/>\n  use_ssl: False<br \/>\n  certificate:<br \/>\n  client_cert:<br \/>\n  client_key:<br \/>\n  ssl_no_validate: False<br \/>\n  http_auth: elastic:yourpassword<br \/>\n  timeout: 30<br \/>\n  master_only: False<\/p>\n<p>logging:<br \/>\n  loglevel: INFO<br \/>\n  logfile:<br \/>\n  logformat: default<br \/>\n  blacklist: ['elasticsearch', 'urllib3']\n<\/code><\/p>\n<p>Create \/etc\/curator\/delete-after.yml<br \/>\nSet unit_count to the number of days to keep indexes. In my example anything older than 60 days gets deleted.<br \/>\n<code><br \/>\nactions:<br \/>\n  1:<br \/>\n    action: delete_indices<br \/>\n    description: >-<br \/>\n      Delete indices older than X days (based on index name), for panos-<br \/>\n      prefixed indices. Ignore the error if the filter does not result in an<br \/>\n      actionable list of indices (ignore_empty_list) and exit cleanly.<br \/>\n    options:<br \/>\n      ignore_empty_list: True<br \/>\n      disable_action: False<br \/>\n    filters:<br \/>\n    - filtertype: pattern<br \/>\n      kind: prefix<br \/>\n      value: panos-<br \/>\n    - filtertype: age<br \/>\n      source: name<br \/>\n      direction: older<br \/>\n      timestring: '%Y.%m.%d'<br \/>\n      unit: days<br \/>\n      unit_count: 60<br \/>\n<\/code><br \/>\nCreate \/etc\/curator\/cleanup.sh and paste in:<br \/>\n<code><br \/>\n#!\/bin\/bash<br \/>\n# This df command grabs the free space of the root '\/'.<br \/>\ndisk=$(df -H | grep -vE '^Mounted| \/.' | awk '{ print $1 \" \" $5 \" \" $6 }' | awk 'NR == 2' | awk '{print $2}' |sed 's\/%\/\/')<\/p>\n<p># Delete indices older than 60 days.<br \/>\ncurator --config \/etc\/curator\/config.yml \/etc\/curator\/delete-after.yml<br \/>\necho $disk<br \/>\n<\/code><br \/>\nNow add to crontab &#8211; to run the script 5 mins past midnight every night:<br \/>\n<code><br \/>\nsudo crontab -e<br \/>\n5 0 * * * \/etc\/curator\/cleanup.sh<br \/>\n<\/code><\/p>\n<p>That it! You can tweak the unit_count days if you want to have say only 7 days worth of logs depending on your use case. You can also run curator manually like so:<br \/>\n<code><br \/>\nsudo curator --config \/etc\/curator\/config.yml \/etc\/curator\/delete-after.yml<br \/>\n<\/code><br \/>\nThis helps when debugging your script logic and checking that elastic is actually deleting indices.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I recently deployed an ELK stack (Elasticsearch, Logstash, Kibana) VM as logger for a Palo Alto Networks firewall. ELK is open source and allows you&#8230;<\/p>\n","protected":false},"author":2,"featured_media":541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28,5],"tags":[],"class_list":["post-242","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-firewall","category-palo-alto-networks"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ELK Stack with Palo Alto Firewall - Using Curator to clear indexes - Insecure Wire<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.insecurewi.re\/index.php\/2019\/05\/26\/elk-stack-with-palo-alto-firewall-using-curator-to-clear-indexes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ELK Stack with Palo Alto Firewall - Using Curator to clear indexes - Insecure Wire\" \/>\n<meta property=\"og:description\" content=\"I recently deployed an ELK stack (Elasticsearch, Logstash, Kibana) VM as logger for a Palo Alto Networks firewall. 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