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by dustnbone
Sat Nov 30, 2019 2:54 am
Forum: General discussion
Topic: SSH brute force attacks?
Replies: 16
Views: 852

Re: SSH brute force attacks?

Or it's you that forgot to change the default port number in an SSH client.

All security has trade offs.
by dustnbone
Fri Nov 29, 2019 11:56 pm
Forum: General discussion
Topic: SSH brute force attacks?
Replies: 16
Views: 852

Re: SSH brute force attacks?

Yeah as long as there's no port forwarded by your router to port 22 on your Pi no one can even attempt to login from outside your internal network, making any attempt at brute forcing impossible. If you do decide to open SSH to the internet for any reason, make absolutely sure you understand how to ...
by dustnbone
Fri Nov 29, 2019 11:41 pm
Forum: Advanced users
Topic: Does 1750Mhz need overvoltage and a fan?
Replies: 8
Views: 583

Re: Does 1750Mhz need overvoltage and a fan?

Is this in Chromium? Maybe they've done work on it but last time I checked it was software decoding. It seemed just on the edge of dropping frames at stock speed. If it's using the omx decoder now that's awesome.
by dustnbone
Fri Nov 29, 2019 10:28 pm
Forum: General discussion
Topic: RPi 4 youtube VP9 videos above 1080p
Replies: 3
Views: 685

Re: RPi 4 youtube VP9 videos above 1080p

Seems unlikely, like I said there's no hardware decoder in the Rpi4 that's capable of VP9, so it's always going to be done on the CPU. Though I think it could work better if it were multithreaded, instead of only using one core. That's going to come down to whatever software decoder (ffmpeg?) is bei...
by dustnbone
Fri Nov 29, 2019 7:08 pm
Forum: General discussion
Topic: RPi 4 youtube VP9 videos above 1080p
Replies: 3
Views: 685

Re: RPi 4 youtube VP9 videos above 1080p

The Pi doesn't do VP9 decoding in hardware AFAIK. 1080p VP9 in LibreElec seems to hog 100% of a CPU core and lags badly. 1080p avc1 uses under 20% of a core and runs perfectly, but I think 1080p is the max resolution for hardware decoding that. The Pi4 does support HEVC decoding in hardware up to 4K...
by dustnbone
Fri Nov 29, 2019 6:23 pm
Forum: Troubleshooting
Topic: SD card problem
Replies: 10
Views: 459

Re: SD card problem

You are unnecessarily torturing the poor little card by writing it full for testing. Just because it's rated at 95MB/s doesn't mean that your card reader is fast enough to go that quick, it's quite possibly connected to the PC through a USB 2.0 port internally in which case it will never go over 30M...
by dustnbone
Fri Nov 29, 2019 9:24 am
Forum: General discussion
Topic: Raspberry Pi Tablet OS
Replies: 33
Views: 2012

Re: Raspberry Pi Tablet OS

Check out this video of KDE with touchegg from 3+ years ago https://www.youtube.com/watch?v=28Jjf5Ak6Q0 If my Android tablet could do that I probably wouldn't hate on it so much. The big problem I think with any significant adoption of KDE Plasma has been lack of hardware. I'm not talking about Ubun...
by dustnbone
Fri Nov 29, 2019 4:13 am
Forum: General discussion
Topic: Raspberry Pi Tablet OS
Replies: 33
Views: 2012

Re: Raspberry Pi Tablet OS

Have you tried running KDE Plasma on it? Both that and GNOME 3 have pretty good touch support, and you'll get decent hardware support that way. I don't think you're going to get a satisfactory Android experience from a Pi. Once you have something up and running making a flashable image for it is pre...
by dustnbone
Fri Nov 29, 2019 3:52 am
Forum: Advanced users
Topic: Does 1750Mhz need overvoltage and a fan?
Replies: 8
Views: 583

Re: Does 1750Mhz need overvoltage and a fan?

I pretend to use the Rpi4 4GB as a desktop computer. I tried to do it with the Rpi3b+ but it was a little not enough powerfull. Rpi4 4GB seems to be good enough, but in some causes, like youtube, it seems it doesn't act very smootlhy, so goving that extra 250Mhz and maybe some more GPU should help ...
by dustnbone
Thu Nov 28, 2019 10:18 pm
Forum: Beginners
Topic: Raspberry Pi Zero WH Adapter
Replies: 18
Views: 652

Re: Raspberry Pi Zero WH Adapter

While I'm not suggesting anyone do it, especially if they value their SD card and it's contents, I've fed the ZeroWH some pretty craptastic power in the past and it's performed just fine. As posted above some USB "chargers" do output lower voltages under load, as do many USB battery packs. The Zero ...
by dustnbone
Thu Nov 28, 2019 10:08 pm
Forum: Troubleshooting
Topic: SD card problem
Replies: 10
Views: 459

Re: SD card problem

You shouldn't need all of those steps to write a Buster image to it.

A simple "dd bs=4M if=buster.img of=/dev/sdx" should do the job, regardless of the previous state of the card. No partitioning or wiping necessary.

If that doesn't work something is broken.
by dustnbone
Thu Nov 28, 2019 10:03 pm
Forum: Troubleshooting
Topic: RaspberryPi public accessible over the network
Replies: 4
Views: 204

Re: RaspberryPi public accessible over the network

Try setting the public port to something else, your ISP might be blocking 8080.

Also make sure the Pis IP address has a DHCP reservation for that address or it could break the port forward when the Pi gets a new IP on boot.
by dustnbone
Thu Nov 28, 2019 10:01 pm
Forum: General discussion
Topic: Where to connect my fan?
Replies: 4
Views: 329

Re: Where to connect my fan?

Or extend the fan leads out to the breadboard for now?
by dustnbone
Thu Nov 28, 2019 9:34 pm
Forum: General discussion
Topic: Best audio solution for Pi 4 desktop config
Replies: 19
Views: 2079

Re: Best audio solution for Pi 4 desktop config

If you've already got powered speakers you don't need the Amp HAT, the DAC HAT will be the one you want. Much simpler because you don't need any fancy power arrangements for it. I use the DAC Zero on my portable music setup (with an external headphone amp) and it sounds pretty good, especially given...
by dustnbone
Thu Nov 28, 2019 8:50 pm
Forum: Advanced users
Topic: Does 1750Mhz need overvoltage and a fan?
Replies: 8
Views: 583

Re: Does 1750Mhz need overvoltage and a fan?

It really depends on the use case, if it's going to be normal desktop type use with short bursts of high processor activity it will probably be fine with passive cooling. If you're planning to do hours of continuous processing (compiling big software on all 4 cores, etc) then you'll want to use some...
by dustnbone
Thu Nov 28, 2019 7:50 pm
Forum: Staffroom, classroom and projects
Topic: set up local wifi with NO access to internet
Replies: 10
Views: 946

Re: set up local wifi with NO access to internet

Yeah pretty much :) You might want to edit a few settings on the Linksys to stop it from assigning DNS and Gateway (just to avoid confusing the clients into thinking it's an Internet gateway). You might also want to name the AP something more interesting than "Linksys" Those Linksys routers can actu...
by dustnbone
Thu Nov 28, 2019 3:13 am
Forum: Staffroom, classroom and projects
Topic: set up local wifi with NO access to internet
Replies: 10
Views: 946

Re: set up local wifi with NO access to internet

https://www.raspberrypi.org/documentati ... s-point.md

Just stop before "Add routing and masquerade" and you should be good to go.
by dustnbone
Wed Nov 27, 2019 3:06 am
Forum: Other projects
Topic: Transmit data over long range (20+ miles)
Replies: 5
Views: 441

Re: Transmit data over long range (20+ miles)

Since it's in the air, line of sight shouldn't be a problem, so WiFi could probably be made to work with directional antennas, if the lateral motion relative to the ground station isn't too much.

Unamplified wifi links over 200km with consumer Linksys wifi routers have been achieved.
by dustnbone
Wed Nov 27, 2019 2:36 am
Forum: General discussion
Topic: Power supply for multiple Pi4's needed. Advice?
Replies: 14
Views: 964

Re: Power supply for multiple Pi4's needed. Advice?

I should have mentioned fusing for sure, mostly to protect the wiring. The Mean Well supplies have short circuit/overcurrent protection built in but 20A is a bit much for a 22/24AWG wire. 5A polyfuses are cheap as chips. ' As for single point of failure, those supplies are well under rated and desig...
by dustnbone
Tue Nov 26, 2019 2:34 am
Forum: Automation, sensing and robotics
Topic: Open source speech recognition
Replies: 2
Views: 273

Re: Open source speech recognition

These guys seem to have done a bit of homework in this regard.

https://maker.pro/raspberry-pi/tutorial ... spberry-pi
by dustnbone
Mon Nov 25, 2019 7:35 pm
Forum: Troubleshooting
Topic: Nyton Virus
Replies: 9
Views: 1227

Re: Nyton Virus

If this drive was shared with write access on a network with Windows boxes, that's how it got encrypted. You need to check any and all Windows boxes on that network immediately. Ideally disconnect them from each other, disable file sharing on them and individually disinfect them. The Pi isn't likely...
by dustnbone
Mon Nov 25, 2019 7:15 pm
Forum: General discussion
Topic: Power supply for multiple Pi4's needed. Advice?
Replies: 14
Views: 964

Re: Power supply for multiple Pi4's needed. Advice?

Just use a proper 5V industrial supply like this one https://www.sparkfun.com/products/14098 Then you don't have to worry about individual ports having enough power, as long as your total load for all things connected is under 20A. There is a small amount of voltage adjustment so you can bump it up ...
by dustnbone
Mon Nov 25, 2019 4:29 am
Forum: Networking and servers
Topic: Pi 4 Dual USB drive Raid ZERO
Replies: 3
Views: 262

Re: Pi 4 Dual USB drive Raid ZERO

Looks like sdb1 is mounted somewhere.

Try

sudo umount /dev/sdb1

first.

Also I don't know if striping across 2 really slow USB sticks is going to help your case much, you'll probably see much better results using a cheap SSD or even a proper 2.5" hard drive.
by dustnbone
Thu Nov 21, 2019 12:28 am
Forum: General discussion
Topic: quality sound card and speaker for Pi 3/Pi Zero
Replies: 12
Views: 596

Re: quality sound card and speaker for Pi 3/Pi Zero

The most economical is going to be just finding a bluetooth speaker that meets your needs/budget. You're not going to get anything hifi for your budget, if you want that it's going to cost a bit more. There's nothing Pi specific about this really, unless you're talking about using dedicated addon DA...
by dustnbone
Wed Nov 20, 2019 12:11 am
Forum: Networking and servers
Topic: AM I defaulting to a degraded Raid5 array?
Replies: 16
Views: 747

Re: AM I defaulting to a degraded Raid5 array?

It looks to just be building the parity data on the third drive. Says it will take 21 hours. Have you copied data to the array?

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