[{"data":1,"prerenderedAt":1208},["ShallowReactive",2],{"/blog/container-network-security-is-important":3,"navigation-en-us":422,"banner-en-us":850,"footer-en-us":860,"blog-post-authors-en-us-Fernando Diaz":1105,"blog-related-posts-en-us-container-network-security-is-important":1120,"blog-promotions-en-us":1145,"next-steps-en-us":1198},{"id":4,"title":5,"authors":6,"body":8,"category":399,"date":400,"description":401,"extension":402,"externalUrl":403,"faq":403,"featured":404,"heroImage":405,"meta":406,"navigation":407,"path":408,"seo":409,"slug":413,"stem":414,"tags":415,"template":420,"updatedDate":403,"__hash__":421},"blogPosts/en-us/blog/container-network-security-is-important.md","How to secure your Kubernetes pods using GitLab Container Network Security",[7],"Fernando Diaz",{"type":9,"value":10,"toc":393},"minimark",[11,15,24,39,42,55,60,72,94,103,113,254,258,261,270,278,282,285,293,296,307,310,317,320,323,340,347,351,354,375,389],[12,13,14],"p",{},"Kubernetes does not come secure out of the box. There is a lot of configuration needed\nto achieve a secure cluster. One important security configuration to consider is how pods\ncommunicate with each other. This is where Network Policies come into play, making sure that\nyour pods are not exchanging data with unknown or malicious sources, which can compromise\nyour cluster.",[12,16,17,23],{},[18,19,22],"a",{"href":20,"rel":21},"https://kubernetes.io/docs/concepts/services-networking/network-policies/",[],"Network Policies"," are rules on how pods can communicate\nwith other pods as well as endpoints. They are pretty much a firewall for your internal cluster network.",[12,25,26,27,32,33,38],{},"GitLab provides Container Network Security using ",[18,28,31],{"href":29,"rel":30},"https://cilium.io/",[],"Cilium"," as a GitLab-managed application.\nCilium is a CNI ",[18,34,37],{"href":35,"rel":36},"https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/network-plugins/",[],"network plugin"," for Kubernetes that can be used to implement support for Network Policies.",[12,40,41],{},"The video below provides an introduction on how to easily implement Network Policies from GitLab,\nas well as a demo on testing Network Policies:",[43,44,47,48],"figure",{"className":45},[46],"video_container","\n  ",[49,50,54],"iframe",{"src":51,"frameBorder":52,"allowFullScreen":53},"https://www.youtube-nocookie.com/embed/45Q__T42ZMA","0","true"," ",[56,57,59],"h2",{"id":58},"network-policies-in-action","Network Policies in action",[12,61,62,63,67,68,71],{},"There are many different ways of configuring Network Policies within your Kubernetes cluster. 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There is no need\nto worry about how to get Cilium up and running. Cilium as well as your Network\nPolicies can be configured as needed.",[12,262,263,264,269],{},"In order to install and configure Cilium as a GitLab managed application, you can follow the steps provided in\nthe GitLab cluster applications documentation.\nThis sample project ",[18,265,268],{"href":266,"rel":267},"https://gitlab.com/gitlab-examples/security/simply-simple-notes",[],"Simply Simple Notes",", is configured to use Cilium. It will install Cilium on the Kubernetes cluster associated with the project.",[12,271,272,277],{},[18,273,276],{"href":274,"rel":275},"https://kubernetes.io/docs/tasks/administer-cluster/declare-network-policy/",[],"This guide"," can be used to test your Network Policies once Cilium has been installed.",[56,279,281],{"id":280},"threat-monitoring-dashboard","Threat monitoring dashboard",[12,283,284],{},"By default Cilium installs with Hubble, a monitoring daemon which collects packet flow metrics per namespace. These\nmetrics are sent to the GitLab Threat Monitoring dashboard.",[12,286,287,292],{},[288,289],"img",{"alt":290,"src":291},"threat monitoring packet metrics","https://res.cloudinary.com/about-gitlab-com/image/upload/v1782398113/blog/Content%20Images/container-network-security/packet-metrics.png","\nPacket Metrics displayed in the Threat Management dashboard",[12,294,295],{},"The packet flow metrics collected are:",[73,297,298,301,304],{},[76,299,300],{},"The total number of inbound and outbound packets for the given time period",[76,302,303],{},"The proportion of packets dropped according to the configured policies",[76,305,306],{},"The average rate per-second of forwarded and dropped packets for the requested time interval",[12,308,309],{},"Within the Threat Monitoring dashboard, you can also view and configure the Network Policies in your project. This makes it easy to navigate\nyour container network configuration in one interface.",[12,311,312,316],{},[288,313],{"alt":314,"src":315},"threat monitoring Network Policies","https://res.cloudinary.com/about-gitlab-com/image/upload/v1782398113/blog/Content%20Images/container-network-security/network-policy.png","\nNetwork Policies displayed in the Threat Management dashboard",[12,318,319],{},"Network Policies can also be created and edited through an intuitive UI. You can just select the network rules you wish to use and the YAML will be automatically created and applied to your cluster. This eliminates the need to edit the complicated YAML structure for Network Policies directly, and allows you to make sure the correct rules are being applied without confusion.",[12,321,322],{},"Network Rules can be created using the following rule types:",[73,324,325,328,331,334,337],{},[76,326,327],{},"Labels",[76,329,330],{},"Entities",[76,332,333],{},"IP/CIDR",[76,335,336],{},"DNS",[76,338,339],{},"Level 4",[12,341,342,346],{},[288,343],{"alt":344,"src":345},"threat monitoring policy creation","https://res.cloudinary.com/about-gitlab-com/image/upload/v1782398113/blog/Content%20Images/container-network-security/policy-creation.png","\nPolicy being created in the Threat Management dashboard",[56,348,350],{"id":349},"learn-more-about-gitlab-security","Learn more about GitLab Security",[12,352,353],{},"I hope this blog can help get you started with Network Policies in Kubernetes. Check out some other\nways GitLab can help with security.",[73,355,356,362,369],{},[76,357,358],{},[18,359,361],{"href":360},"/blog/secure-stage-for-appsec/","How application security engineers can use GitLab to secure their projects",[76,363,364],{},[18,365,368],{"href":366,"rel":367},"https://docs.gitlab.com/integration/jenkins/",[],"How to capitalize on GitLab Security tools with external CI",[76,370,371],{},[18,372,374],{"href":373},"/blog/understanding-kubernestes-rbac/","What you need to know about Kubernetes RBAC",[12,376,377,378,383,384],{},"Cover image by ",[18,379,382],{"href":380,"rel":381},"https://unsplash.com/@dhelentjaris",[],"Diane Helentjaris"," on ",[18,385,388],{"href":386,"rel":387},"https://unsplash.com/photos/TYk0YQbog9g",[],"Unsplash",[390,391,392],"style",{},"html pre.shiki code .shJU0, html code.shiki .shJU0{--shiki-default:#22863A}html pre.shiki code .sgsFI, html code.shiki .sgsFI{--shiki-default:#24292E}html pre.shiki code .sYBdl, html code.shiki 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