Mastodawn

Yes. After doing it once one always has the lurking suspicion that one day one will come up against the LAN of someone else who has had the very same idea — whose birthday, or lucky numbers, or CRC16, or whatever just happen to make the same octets in the network part.

Then there are things like having an ISP that uses various parts of 10.0/8 for its internal infrastructure. Even my own ISP uses 192.168.100.0/24 for its own purposes on customer-premises equipment.

@mdavis
#RFC1918 #IPv6 #IPv4 #SiteLocalAddresses #PrivateUseAddresses #LANs #NetworkAdministration

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Klaus Umbach Jan 29

@zhenech You are so dirty! Never show your private IPs in public! People get offended, when they see those filthy #RFC1918-parts.

mutant ﴾! offiziell !﴿ ⸙Jan 18

#SLOP me up, Trumpy!

"your provider will give you: A public IP address (e.g., 192.168.1.100)."

Quelle:
www.tecmint.com/ubuntu-server-setup/

im Gegensatz zu:
#RFC1918

#legacy #IPv4 - immer super!

Lucio Sep 18, 2025

Your home address is public (where the world can locate you). Your couch is a private address (for your family only). RFC 1918 IPs (like 192.168.x.x) are the 'couches' of the internet. They need NAT (the postal system) to get mail from the public internet. It's the general reason why we're not all out of IPv4 addresses. yet!

#Networking #IPAddress #RFC1918 #NAT #Tech

Andreas Scherbaum Jun 9, 2025

certbot on Debian Bookworm fails with: The peer didn't know the key we used

https://andreas.scherbaum.la/post/2025-06-09_certbot-on-debian-bookworm-fails-with-the-peer-didnt-know-the-key-we-used/

#LetsEncrypt #Debian #Challenge #Bookworm #Trixie #Certbot #Bind #RFC1918 #Encryption #DNSSEC #ACME #DNS

certbot on Debian Bookworm fails with: The peer didn't know the key we used

Was setting up a new Debian Bookworm system in my home environment. So far I was not using certificates at home, and wanted to change this along the way, using Let's Encrypt. Since the IP-addresses here are RFC1918, I can't use the http01 challenge, and have to resort to dns01 challenges. On Debian Bookworm, using certbot, this fails reproducible.

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