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K8S nodeport iptable rules under the hood

Sarath Chandra Mekala published on 2024-04-19 included in Kubernetes

In this blog, lets explore what changes are done to iptable rules when a NodePort service is created for an application.

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IP in IP (IPIP) tunnels using linux network namespaces

Sarath Chandra Mekala published on 2024-04-07 included in Networking

In this blog, lets explore how IPIP tunnels work using linux network namespaces.

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Understanding GRE tunnels using Linux network namespaces

Sarath Chandra Mekala published on 2024-04-06 included in Networking

In this blog, lets explore how GRE tunnels work using linux network namespaces.

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Linux SSH Tunnels

Sarath Chandra Mekala published on 2024-04-02 included in Networking

In this blog, lets explore the various types of SSH tunnels using scenario based use cases.

Local port forwarding (Forward SSH Tunnel)
Remote port forwarding (Reverse SSH Tunnel)
Proxy SSH tunnel

Flannel CNI under the hood

Sarath Chandra Mekala published on 2024-03-23 included in Kubernetes

In this article, we will do a deep dive into how the flannel cni networking works.

Bridge Netfilter: Unexpected Consequences

Sarath Chandra Mekala published on 2023-09-23 included in Networking

Docker loads bridge netfilter kernel module which creates certain side effects on the system. This blog explores the unexpected consequences and provides a solution for it.