From ad2921225b661359a4d83d2beb8aff09486ea383 Mon Sep 17 00:00:00 2001 From: serewicz Date: Thu, 24 Mar 2022 09:58:58 -0500 Subject: [PATCH 1/2] Update install-kubeadm.md Telnet is a command that really should not be used, as there is too great a chance it could be misused. NetCat, nc, is a better and newer tool for testing single open ports. --- .../production-environment/tools/kubeadm/install-kubeadm.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md index dc3ad5d7a6..d3db020b99 100644 --- a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md +++ b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md @@ -69,10 +69,10 @@ For more details please see the [Network Plugin Requirements](/docs/concepts/ext ## Check required ports These [required ports](/docs/reference/ports-and-protocols/) -need to be open in order for Kubernetes components to communicate with each other. You can use telnet to check if a port is open. For example: +need to be open in order for Kubernetes components to communicate with each other. You can use NetCat to check if a port is open. For example: ```shell -telnet 127.0.0.1 6443 +nc 127.0.0.1 6443 ``` The pod network plugin you use (see below) may also require certain ports to be From 5750981c00a4b7b02ee3f52b7c2dfe16ab0ffe2d Mon Sep 17 00:00:00 2001 From: serewicz Date: Mon, 18 Apr 2022 11:25:13 -0500 Subject: [PATCH 2/2] Update content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md Co-authored-by: Lubomir I. Ivanov --- .../production-environment/tools/kubeadm/install-kubeadm.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md index d3db020b99..91b54e18e4 100644 --- a/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md +++ b/content/en/docs/setup/production-environment/tools/kubeadm/install-kubeadm.md @@ -69,7 +69,7 @@ For more details please see the [Network Plugin Requirements](/docs/concepts/ext ## Check required ports These [required ports](/docs/reference/ports-and-protocols/) -need to be open in order for Kubernetes components to communicate with each other. You can use NetCat to check if a port is open. For example: +need to be open in order for Kubernetes components to communicate with each other. You can use tools like netcat to check if a port is open. For example: ```shell nc 127.0.0.1 6443