63
this post was submitted on 12 Oct 2026
63 points (98.5% liked)
No Stupid Questions
50417 readers
578 users here now
No such thing. Ask away!
!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.
The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:
Rules (interactive)
Rule 1- All posts must be legitimate questions. All post titles must include a question.
All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.
Rule 2- Your question subject cannot be illegal or NSFW material.
Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.
Rule 3- Do not seek mental, medical and professional help here.
Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.
Rule 4- No self promotion or upvote-farming of any kind.
That's it.
Rule 5- No baiting or sealioning or promoting an agenda.
Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.
Rule 6- Regarding META posts and joke questions.
Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.
On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.
If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.
Rule 7- You can't intentionally annoy, mock, or harass other members.
If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.
Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.
Rule 8- All comments should try to stay relevant to their parent content.
Rule 9- Reposts from other platforms are not allowed.
Let everyone have their own content.
Rule 10- Majority of bots aren't allowed to participate here. This includes using AI responses and summaries.
Credits
Our breathtaking icon was bestowed upon us by @Cevilia!
The greatest banner of all time: by @TheOneWithTheHair!
founded 3 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
The link local one is like the equivalent of the ipv4 rfc1918 addresses, like 192.168.1.1; its used for local lan connections. For the globally-routed addresses, the router advertises its 64-bit network prefix; all the following methods are about configuring the remaining 64 bits to make up the complete 128 bit address.
If the router is running DHCPv6, there is a 'fixed' one that stays constant. Its assigned by the router using DHCPv6 and should stay relatively constant as long as your router keeps your mac address mapping in memory. Its probably shorter like ::1a or something; this is the one you should use for hosting services; the constant address is useful if you send someone your IP address or want to create a DNS AAAA record.
With the right network configuration flags, you may also have a fixed address using SLAAC wherein the host configures itself. Unlike the short DHCPv6-type addresses, it looks completely random but its not; its derived the same way every time you connect to that specific network using some hashing algorithm techniques. But if you connect to a different network it will derive a different random-looking 64 bits, but also stable for that network. The idea here is that IPv6 used to use the mac address for the last 64 bits, but this meant someone could track you moving your machine from network to network by matching against the last 64 bits of the address, so this method was developed to prevent that privacy leak but still allow some kind of stability. You can also use this one for hosting since its stable.
Linux will also configure truly random, dynamic IPv6 address. It will change by default once a day. This is used as the default for new outgoing connections. This is meant for privacy, since your outbound traffic will come from a new source every day and its harder to track you over time. In reality the advertising networks just track you by your 64-bit prefix instead, meaning you're tracked by your household instead of down to the individual machine (so very similar to NAT for ipv4 where the entire household shares a single IPv4). There is a 5m window overlap where there are two dynamic IPs right before the old one expires; this lets the existing connections close out safely.