Monday, January 8, 2024

Two very short jokes, one TCP and other UDP

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TCP:  ” You wanna hear a TCP joke ?  You wanna hear a TCP joke ?  You wanna hear a TCP joke ?  You wanna hear a TCP joke ?  [...]” UDP: I’d ...
Tuesday, December 5, 2023

BGP: IPv6 Only example between OpenBGPD and FRR

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FRR: show run frr# sh run  Building configuration... Current configuration: ! frr version 8.1 frr defaults traditional hostname frr log sysl...
Monday, December 4, 2023

How to create an IPv6 route to null/blackhole in Linux

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 Case:     How to create an IPv6 route to null/blackhole in Linux Command:    ip -6 route add blackhole fd00:12:34::0/48 I hope it is useful
Sunday, October 29, 2023

How to temporarily disable IPv4 on an interface within Linux

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Case:    We want to disable IPv4 on an interface Solution:    sudo ip -4 addr flush dev enp0s1 Explanation:    The above command removes all...
Friday, October 13, 2023

How to uninstall brew in MAC

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How to uninstall brew in MAC   Option 1:  /bin/bash -c " $( curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstal...

NGINX Reverse Proxy for an IPv6-Only Server Farm

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Introduction This work presents a very simple way to offer dual-stack web access to an IPv6-only server farm using NGINX. The continued grow...
Thursday, July 6, 2023

Google returns: 403. That's an error. Your client does not have permission to get URL / from this server. That's all we know.

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 Introduction:    You want to do a google search and the page returns: "403. That’s an error.    Your client does not have permission t...