{"id":1715,"date":"2019-08-06T11:32:15","date_gmt":"2019-08-06T11:32:15","guid":{"rendered":"https:\/\/www.testpreptraining.com\/tutorial\/?page_id=1715"},"modified":"2020-05-02T06:41:35","modified_gmt":"2020-05-02T06:41:35","slug":"vpc-flow-logs","status":"publish","type":"page","link":"https:\/\/www.testpreptraining.ai\/tutorial\/aws-sysops-administrator-associate\/vpc-flow-logs\/","title":{"rendered":"VPC Flow Logs"},"content":{"rendered":"\n<ul class=\"wp-block-list\"><li>Used to capture IP traffic going to &amp; from your VPC &amp; stored in Amazon Cloudwatch logs<\/li><li>VPC Flow Logs is a feature that enables the user to capture information about the IP traffic going to and from network interfaces in your VPC<\/li><li>Flow log data is stored using Cloudwatch Logs<\/li><li>When Flow log data is collected it can be viewed and its data can be retrieved within Cloudwatch<\/li><li>Flow logs can be created at 3 different levels, VPC, Subnet and Network Interface levels<\/li><li>Flow logs via Cloudwatch can be configured to stream to services such as Elasticache, or Lambda<\/li><li>You cannot enable flow logs for VPC&#8217;s that are peered with your VPC unless the peer VPC is in your account<\/li><li>You cannot tag a flow log<\/li><li>After you have created a flow log, you cannot change its configuration, for example you cannot associate a different role with the flow log<\/li><li>Not all traffic is monitored:\n<ul>\n<li>Traffic generated by instances when they contact Route53 is not monitored or logged<\/li>\n<\/ul>\n<ul>\n<li>If you use your own DNS server, then all traffic to that DNS server is logged<\/li>\n<\/ul>\n<ul>\n<li>Traffic generated by a Windows instance for Windows license activation is not monitored or logged<\/li>\n<\/ul>\n<ul>\n<li>Traffic to and from the metadata service (169.254.169.254) is not monitored or logged<\/li>\n<\/ul>\n<ul>\n<li>DHCP traffic is not monitored or logged<\/li>\n<\/ul>\n<ul>\n<li>Traffic to the reserved IP address for the default VPC router is not monitored or logged<\/li>\n<\/ul>\n<\/li><li>Can be setup at 3 levels\n<ul>\n<li>VPC<\/li>\n<\/ul>\n<ul>\n<li>Subnet<\/li>\n<\/ul>\n<ul>\n<li>Network Interface<\/li>\n<\/ul>\n<\/li><li>After creation, the config of flow logs cannot change.<\/li><li>Not all IP traffic is monitored.\n<ul>\n<li>DNS Server<\/li>\n<\/ul>\n<ul>\n<li>Windows license activation by windows server<\/li>\n<\/ul>\n<ul>\n<li>169.254.169.254<\/li>\n<\/ul>\n<ul>\n<li>DHCP<\/li>\n<\/ul>\n<\/li><li>Reserver IP Addresses<\/li><\/ul>\n\n\n\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Used to capture IP traffic going to &amp; from your VPC &amp; stored in Amazon Cloudwatch logs VPC Flow Logs is a feature that enables the user to capture information about the IP traffic going to and from network interfaces in your VPC Flow log data is stored using Cloudwatch Logs When Flow log data&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":383,"menu_order":29,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[7,241],"class_list":["post-1715","page","type-page","status-publish","hentry","category-amazon-aws","tag-aws","tag-vpc-flow-logs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>VPC Flow Logs | Tutorials | Testprep<\/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.testpreptraining.ai\/tutorial\/aws-sysops-administrator-associate\/vpc-flow-logs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VPC Flow Logs | Tutorials | Testprep\" \/>\n<meta property=\"og:description\" content=\"Used to capture IP traffic going to &amp; 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