Wednesday, May 19, 2021

Solved: nping - libnsock mksock_bind_addr(): Bind to 2001:db8:1::1:0 failed (IOD #1): Cannot assign requested address (99)

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  Problem:   When using nping (which comes with nmap) we receive the message: libnsock mksock_bind_addr(): Bind to 2001:db8:1::1:0 failed (I...
Thursday, September 3, 2020

Solved: Closing connection because of an I/O error in FRR - at least in Ubuntu

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 If you are getting this message in FRR: Closing connection because of an I/O error in FR The solution is straight forward. You have to comp...
Tuesday, September 1, 2020

Tiny script: how to get the RRSIG DNS records with python3

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 (I guess there are many other ways to do this, even more elegant) import dns.resolver domain='lacnic.net' domain = dns.name.from_te...
Monday, August 10, 2020

My review about coin.space (in summary, not recommended)

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  Hello there,   I know many of you are looking for good BTC wallets, good cryptocurrency fees and so on.   Unfortunately I can not tell you...
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...
Monday, July 8, 2019

BGP: To filter or not to filter by prefix size. That is the question

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Introduction In order to write these post the R+D team and the WARP team joint together after analyzing some security incidents related ...
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)