Showing posts with label ipv4. Show all posts
Showing posts with label ipv4. Show all posts
Wednesday, February 12, 2025

The History behind Netmasks.

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Introduction Do you remember when you were learning about netmasks? You probably thought that they were useless, that you wouldn’t need them...
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, September 6, 2019

The sad tale of the ISP that didn’t deploy IPv6

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Once upon a time in the not so distant past, a large ISP dominated a country’s  telecommunications market and felt powerful and without comp...
Friday, July 13, 2018

How to run Flask framework to listen in both IPv4 and IPv6 (DualStack)

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Issue:   How to run Flask framework to listen in both IPv4 and IPv6 (DualStack) Answer:    app.run(host='::',port=5005)
Monday, August 21, 2017

My humble results. Testing ping to loopback using v4 and v6

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Hello there,   Regarding RTT v4 vs v6 I did something "interesting" recently, would like to know your thoughs.   If you pi...
Monday, February 29, 2016

Read a BGP live stream from CAIDA

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Objective   Read a BGP live stream from CAIDA and insert them into a BGP session What do we need   bgpreader from the bgpstream core pac...
Monday, January 26, 2015

The sad tale of the ISP that didn’t deploy IPv6

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Once upon a time in the not so distant past, a large ISP dominated a country’s telecommunications market and felt powerful and without compe...
Monday, November 17, 2014

$GENERATE A records using BIND. Match forward and rDNS

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Hi, This post is very short but perhaps very useful. There is less documentation on the Internet than expected. Objective:  a) Set the ...
Thursday, February 21, 2013

Advertising IPv6 Routes Between IPv4 BGP Peers (Cisco)

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Situation:    I want to advertise IPv6 networks / prefixes over IPv4 eBGP session History:    Although not common, this case may occur in so...
Monday, January 14, 2013

IPv6 crosswords puzzle

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http://goo.gl/lVuv6 I hope you enjoy it :)