rezifon
@rezifon@lemmy.world
- Comment on IPv6 & Opnsense & Not Exposing Machine-Specific IPv6s to Corpos 1 week ago:
How do things outside the LAN talk to things inside the LAN that have ULA addresses. . .?
One big conceptual difference between IPv4 and IPv6 is the notion that any single host on the network is expected to have multiple, simultaneously-useful IPv6 addresses and this is totally normal and fine.
Any IPv6-enabled host is necessarily going to have a link-local address which can only be used to communicate with other hosts on the local network/subnet.
If your ISP offers IPv6 connectivity, or if you’ve set up an IPv6 tunnel from an IPv6 tunnel provider then a host on your network will also have a globally-routable IPv6 address which was assigned from your router via DHCPv6 or (more commonly) self-assigned using SLAAC (Stateless Address Autoconfiguration) which is an IPv6 way for machines to self-assign addresses is a sane, interoperable way without requiring a setup and operation of a service like DHCP(v6). Many IPv6 networks do not need to use run a DHCPv6 server at all and rely solely on SLAAC host self-assignments and local IPv6 router discovery protocols to find DNS servers and eligible gateways to other networks and the internet at large.
The block of IPv6 addresses used for your local machines is delegated by your ISP or tunnel provider. It can be static or dynamic and the underlying protocols will handle if that network range changes. IPv6 generally is tolerant of a host’s public IP addresses changing at any time without disrupting connections or services.
With privacy extensions (enabled by default on all mainstream operating systems) a host on your network might have additional publicly-routable addresses which rotate frequently for privacy. Outbound traffic for the host will prefer these more private addresses for new connections. These addresses are ephemeral and change frequently.
In rare cases you might set up ULA addresses which are static and usable on your internal networks but will not be routed to the internet. They can be used for hosting services on your local network which need to potentially span multiple subnets/VLANs and in particular are useful for internal resources like name servers which cannot rely on DNS lookups for address resolution. Most networks will not use ULA addresses and normal use cases do not require them.
At any given moment, an IPv6-enabled host will have multiple active addresses all used for different types of traffic and it’s important to break any assumptions you have carried over from IPv4 about the relationship between IP addresses and hosts on the network. Your host might be using a link local address to talk to another machine on a shared internal subnet while also using temporary, globally-routable IP privacy address to talk to a server on the internet. Multiple addresses can be in use at the same time to reach different endpoints in the world.
- Comment on Admit it. WE all do this 4 weeks ago:
Some people you encounter have interesting jobs that they truly enjoy. Engaging them on that subject can be interesting and rewarding.
- Comment on How big is your media library? 1 month ago:
I have single movies that are larger than your entire song library.
- Comment on Senate GOP budget bill has little-noticed provision that could hurt your Wi-Fi 1 month ago:
I lost power and water for several days following a hurricane. No internet and no cell signal.
A dual band HT was our only way to learn what was happening across the city and in our neighborhood. It was a lifeline. I’ve got a bigger mobile unit set up now with a better antenna. Easy thing to keep on hand for the next zombie attack.
- Comment on Self-hosting your own media considered harmful - I just received my second community guidelines violation for my video demonstrating the use of LibreELEC on a Raspberry Pi 5, for 4K video playback 2 months ago:
This is incorrect in the US. Ripping DVD and Blu-ray media for personal use has been part of the fair use doctrine since 2015.
- Comment on Tesla recalls all Cybertrucks ever made over trim falling off | Electrek 5 months ago:
. . . and have 100k to spend.
You can get an 84 month auto loan these days if you’re dumb enough to do it.
- Comment on Undocumented "backdoor" found in Bluetooth chip used by a billion devices 5 months ago:
It’s a reasonable question. There are countless devices using esp32 chips which do not use the Bluetooth parts of the chip at all.
- Comment on Your boomer parents after giving you the most outdated job-seeking advice of your fucking life [Day 86] 5 months ago:
Thanks for your feedback.
- Comment on Your boomer parents after giving you the most outdated job-seeking advice of your fucking life [Day 86] 5 months ago:
So that’s a “yes,” then. Good luck with that.
- Comment on Your boomer parents after giving you the most outdated job-seeking advice of your fucking life [Day 86] 5 months ago:
Is this really the hill you want to die on?
- Comment on OpenAI CEO Sam Altman says his company is 'out of GPUs' to which I reply 'welcome to the party, pal' 5 months ago:
- Comment on Jellyfin is not just good... but *better* than Plex now?! 5 months ago:
I just sucked it up and paid for Infuse Pro and now my Apple TV experience with Jellyfin is great
- Comment on Comcast, Disney, and IBM Are Among Advertisers Returning to X After Ad Freeze 9 months ago:
This isn’t advertising, it’s tribute.