Unfortunately.
https://tools.ietf.org/html/rfc3596#section-2.5
You can technically make the ptr record whatever you want, but for consistency I use the forward reading "-" notation with the actual IP.
Can someone ELI5 rDNS for me? I've got a big chunk of public IP space and my network engineer friend keeps saying I should set rDNS up for it. He won't explain why or how though.
IP addresses can have DNS records associated (delegated) to them, (hence Reverse DNS).
This is used primarily to confirm an IP is associated/controlled by the same domain it is serving, most prominently for E-mail reasons.
All public-accessible IPs should technically have a corresponding rDNS record (with a valid PTR record) by either IETF or ICANN proclamation.
How it works is that, where in normal DNS situations you have a client look up the (A) record for a domain, and the DNS system returns a it (E.G example.com -> 93.184.216.34 ).
An interesting part of the DNS system is sub-delegation, where you can actually pass authority of sub-domains to other DNS systems, so you might host the root for example.com, but you can sub-delegate test.example.com to another DNS system.
In the rDNS system, the client will look up the IP inside the in-addr.arpa DNS root-zone, that then returns a PTR record. This system is standardized, so the system always knows the ip 93.184.216.34 can be found at 34.216.184.93.in-addr.arpa.
Aforementioned sub-delegation is a key point to this, the RRs that hold the in-addr.arpa zone, can sub-delegate the relevant sub-domain to your own DNS system, allowing you to put PTR records that can then be looked up via the DNS system.
So for example, I have this zone in my DNS records:
https://s.gvid.me/s/2019/04/09/O6L651.png
And here's a record in that zone:
https://s.gvid.me/s/2019/04/09/UWo212.png
And the forward-confirming record:
https://s.gvid.me/s/2019/04/09/HKB032.png
Thanks for the explanation! I know basically next to nothing about advanced networking topics like this but I'm slowly learning. I know the ins and outs of standard DNS so this is starting to make some sense.
It's a bit of a convoluted setup. I've got a full /24 block that's being announced by a friend who has an ASN. Via a vpn tunnel it comes back to a hub box I'm paying for in new york. I'll have to ask him the best way to go about doing rDNS with this - he's actually friendly and willing to teach me stuff when I ask.
damn boye.
I could run a lot of SRCDS instances with that
But yeah, /24 is P easy for rDNS, you don't have to fuck with the weird classless rDNS IETF specs.
You should probably have a way to programatically generate the initial records though, since I imagine setting 256 records manually isn't how you want to spend your lunch.
let me tell you a story
back when TCP/IP was in its infancy, there happened to be a ham radio operator who said "hey, we've got a shit ton of IP addresses here. Let me just take the entire class A 44 netblock and dedicate it to amateur radio use only.
So now if you're a ham you can request basically whatever you want within reason since there's so much space available. I requested a /24 and they asked if I wanted more. The friend who announces my block also has his own /22 block (because he can, he currently uses about fifteen addresses)
Good fucking God. I just burped and it invoked Cortana on my Harmon/Kardon Invoke.
Easily the worst digital assistant out there.
I can't find my old OG Logitech MX518 and its killing me inside. I want to find the old boy so bad.
I did see Logitech rereleased the mouse tho, so I might pick that up.
This post is a bump to make page 20 accessible
I need an adult.
I'm currently doing a project, involving these tiny fuckers here. Step down buck converters, costs about fuck all, was acquired with the purpose of easily changing the volt range within the build im doing. But i'm suspecting i am doing shit wrong.
If i understand it, which i most likely don't, this is what i am currently trying.
https://files.facepunch.com/forum/upload/110613/942e3eb9-78e3-48a2-8b6c-6a733e815604/Screenshot_2019-04-11 LunaPic com Photo Editor Drawing Tool tool .png
I give the thing 12v dc, but Xv always reads somewhere along 5,16 - 5,20 volt. I've tried adjusting the potentiometer, as the description says is the default output, but it only flickers along the same voltage. I've tried soldering across 12v, 9v and 5v pads (individually), and i've tried cutting the path as instructed in the pic, to make it possible to set a fixed output. But i still only get a reading of 5,15 - 5,20 on the output voltage.
Am i doing it wrong, or are these things so fucking cheap they were never meant to work anyway?
Electrical Engineering V4
People in this thread can probs help you.
I haven't really worked with these myself, but does this thing not have a datasheet or something that comes with it? I'd be interested in seeing it if it does.
It's not until very recent i had that tought myself as i kept staring at this dumb thing, but hooking it up as such, resulted in no output voltage at all.
Flip your in & out lines, then you should be good. EN sounds to me like an enable pin but grounding that should probably still work if it's active low. If you're still not getting anything, I'd starting trying to figure out if that EN line needs a voltage of some kind. I doubt it, but that would be my next step.
I'd also advise you to not try and pull 3A from those. The QC is very hit and miss and I'd de-rate it to at least half that output current, else you might smoke things.
A Linux question for the terminal wizards out there:
I have a HDD (/dev/sda) and two NVMe in soft raid (/dev/md2).
/dev/md2 is the primary drive I want to boot from. Both /dev/sda and /dev/md2 have boot partitions, but ideally I want to get rid of the boot partition on /dev/sda. Is there a proper way to determine which is in use, and if it is safe to delete the partition from /dev/sda?
Doing `df /boot` shows that it is mounted from /dev/md2, and there don't seem to be any references to mounts on /dev/sda.
Is there anything I should check before pulling the trigger?
You're probably better off removing one from the system and seeing if it's the one with the correct partition or not.
Remote dedi. So we're operating blind.
Redirect Notice
Well, my IPv6 rDNS is hilariously misconfigured now. And for once it's not my fault.
I have ascended to 4K
https://cdn.discordapp.com/attachments/563089039184363536/567982325623947279/JPEG_20190417_105853.jpg
Actually i bought it because i bought a xbox one x last saturday and i didnt want to bother to use my parents living room tv. Aaaaand also productivity reasons
Oh if by productivity you mean Adobe, you're going to enjoy the extra workspace room so much.
already used lightroom, and it's nice to see the details
So I have a computer issue. I have tried googling all sort of phrases and I cannot get an answer, so I'll try and explain as best I can the issue.
Every program I have active keeps getting 'backgrounded', it stops responding to mouse scrolling and keyboard inputs and I get a 'ding' error sound when I type, until I click on the program and make it active again. Just typing this out it happened a whole bunch.
I am using windows 7, and yesterday when trying to install the latest drivers on my wireless card I had to do a system restore and that seems to have caused the issue to surface.
Does anyone know what this is?
Anyone know of a program that can comb folders for images that are visually similar, but not necessarily bit-for-bit? I am trying to clean up my images folder and it's a godawful experience without some kind of automation.
I've use something called DupeGuru. It's not the greatest at finding similar images (some false negatives even with really wide settings) but it gets the job done.
That's a start, I'll check it out!
Fun fact:
Reverse DNS supports DNSSEC.
I have never seen it used in production.
Guys what browser do you use?
Am I fine using Edge, or am I severely gimped?
I'd use Firefox or chrome, but ever since I formatted for a new cpu and mobo, I feel just not giving a damn about those and use Edge instead, unless it has a severe problem in something.
I'd rather not use chrome at all though. Last few days I had it, it seemed like it crashed way more than it should, and like it was hogging a lot of resources.
I use Firefox as my main browser. I use Chrome on my work machine to segregate my work/slacking browser history better, and I have refused to put any better browser than Edge on my music workstation to try to keep myself from dicking around online instead of working.
Firefox has these main advantages for me:
Sync across multiple machines and even smartphone
Much better adblock extensions
Fuck Google
Seems to be faster and lighter in general use (except on Google-owned sites, GMail is really slow to load now)
Been using it for literally a decade and a half, might as well keep going
It sometimes goes back and forth, but since Mozilla has been swapping out chunks of Firefix with stuff re-written in Rust (and general threading / GPU acceleration) I've found it to be much more performant.
I just wish there weren't as many weird HTML rendering differences between them, I find Chrome to have less weird fucky issues when doing CSS work (Firefox's border rendering is still pretty bad).
In general I hate browsers though, you think massive projects like them would get proper work so things work correctly (Gamma-correct scaling, proper video swing, etc) but usually it's such a crapshoot.
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