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Administrator
1 month ago
Cisco Command Line is still the best. ;)T

https://networking.ringofsaturn.com/Cisco/ciscocommandguide.php

Administrator
3 months ago
https://mycomputerdudes.com/product/3d-printed-rocket-from-guardians-of-the-galaxy/ Follow this link to purchase a 3-d printed plastic model of "Rocket" Racoon from Guardians of the Galaxy! Super detailed!! :)T

Administrator
3 months ago
Here is an interesting website that does Site Ranking and Search Engine Ranking for any website. It generates a free report online and in PDF format. https://checkpagerank.net/index.php

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9 months ago
Computer Dudes 800 Number: 1-800-545-1449

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10 months ago
Chatbox Active: Sorry, you have to be a Computer Dude to post here. ;)

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The Computer Dudes, Inc's:  Focus and High Traffic Technology News

This section gives special Focus on current Technology Issues in homes and small businesses.  

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Security News

Iterations

on 09 Oct 2019  Posted by Administrator  Category: Security News  

When using MicroSD cards as hard drives, one simply has to swap out the SDcard, to get another iteration of the operating system and software for testing against original and future configurations. 

Think of it as a method rapid parallel prototyping, without buying multiple copies of the hardware.

In this case we are using Single or Multiple Raspberry Pi 4B's for speed testing of advanced functions like decryption or bruteforce hash cracking.    Instead of buying multiple sets of the hardware all we did is get extra MicroSDcard.   We work on one set of dev and testing, then switch SDcards and try a slightly different iteration.  

The "Skunk" - a mail-able computer that calls home from "on the road."

on 01 Oct 2019  Posted by Administrator  Category: Security News  

Today we invented a new "Mail-able" Computer that tracks itself as its being transported, measures radio channels, temperature, pressure, motion, speed and "calls home" when it finds an open network.

We named it "The Skunk" because it is small and mostly black with a little antenna "tail," all inside a sealed shipping envelope. 

Sorry, it is proprietary technology and not for sale at this time, but maybe soon.  - Todd

A cluster of "Pi" offers new hope in decrypting Ransomware. A cluster of 4 Raspberry Pi 4B's we named "Chico" because it is smaller than a loaf of bread.

on 15 Sep 2019  Posted by Administrator  Category: Security News  

Ransomware has become an annoying problem here in Florida and the Southeastern United States.   Many small companies and government agencies are not prepared and have no defense against the attacks.   They also have no money to get new computers or repair the security problems that let the Ransomware in.   

Maybe there is another solution:  Break the Encryption with powerful minicomputers like the new Raspberry Pi 4 or clusters of them.  

That is one of the projects we are working on here at Computer Dudes this week.   We are clustering 4 of the new Raspberry Pi 4's that have 4 Gb of DDR4 memory.   We named it "Chico" because it is smaller than a loaf of bread.

Below are some of the things we are looking at in addition to Decryption Projects as well as how we plan to setup the cluster for maximum efficiency. 

1) Already making mods to the original configuration. We found a Windows Utility that will Format an SDCard in FAT 32 up to 2 Tb. (far past the Microsoft limitation of 32Gb)  We used the fastest Camera Grade SDCards we could find with 64 Gb each.so a 4 Pi cluster has 256 Gb of Solid State Camera Grade SDCards as its primary Hard Drive.


2)  But, as fast as those SDCards are they are snails compaired to the speed of the 4 Gb of DDR4 RAM memory.  So we will have to use some of the DDR4 memory as a RAMDisk. Its gonna be sick how fast it is.

3) We are naming the cluster version "Chico" "My little friend, Chico!". "Chico" the portable supercomputer, running off a cell phone battery.  ;)

4)  The WiFi and Bluetooth are great but for pure computing strength we will shut them both down and use the Gigabit Ethernet Port.  Every un-needed driver, program, or function shut down and removed increases the computing power of the Raspberry Pi 3 and 4.

5)  Next we will be shut down devices and functions not used to save computing and electric power. More on that here:  https://learn.pi-supply.com/make/how-to-save-power-on-your-raspberry-pi/  

6)  Then we will setup a RAMdrive and set the software to load the RAMdrive from the SDcard and then booting from the RAMdrive. (Because it is much faster)   https://www.domoticz.com/wiki/Setting_up_a_RAM_drive_on_Raspberry_Pi?

7)   When the cluster is complete it can be used as a high speed webserver.   In fact, the Raspberry Pi manufacturer uses a cluster of Pi's to host their website and support sites.  Very heavy, interactive websites with all sorts of multimedia too.   https://www.techrepublic.com/article/low-cost-raspberry-pi-4-cluster-hosts-official-pi-website-handles-record-traffic-for-pi-4-launch/

Update for Monday, September 16, 2019

Today we reviewed memory device speed for the Raspberry 4B.   

USB 3.0  vs MicroSD Storage

Since Raspberry Pi 4 now comes with two USB 3.0 ports, which support  ~100MB/s read/write speed,  Connecting a SSD USB 3.0 Drive gets even better speed..

But before you settle on one of those devices check out the transfer speed of the DDR4 on the Raspberry Pi 4.

DDR4 data transfer rate:

  • DDR4 2133:17 GB/s
  • DDR4 2400:19.2 GB/s
  • DDR4 2666:21.3 GB/s
  • DDR4 3200:25.6 GB/s

Update for the Week of October 7th, 2019

The first successful field test was conducted at an office building and residence near downtown Tallahassee, Florida.

We boosted Chico's Hardware configuration up to 7  Raspberry Pi 4B's and we had to order a cable to add the 8th one NEXT week.

The onside tests were successful.  No problems with heat, power, batteries or networking.

Next Week we are going to work on the clustering and ramdisk to increase the speed of all operations.

More soon.  - Todd :) 

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