Author Archives: Daz

eachine 250 quad racer – PIDs

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download (2)Building a new FPV racer i have quickly found myself tweaking the firmware and PID settings. Here are some of best bits i have found around the Eachine 250 racer.

http://wikirotors.com/index.php?title=Eachine_Racer_250

Roll: Kp 0.0034 Ki 0.0119 Kd 0.000046

Pitch: Kp 0.00454 Ki 0.01589 Kd 0.000061

Yaw: Kp 0.00794 Ki 0.01509 Kd 0.000067

These are designed for use with a 1500 mAH Lipo mounted on the lower plate. Note: these are not tuned for use with Gopro or other camera.

PIDs for video following;

Racer PIDs.jpg (897×219)

change windows 2012 to core mode

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downloadFound yourself considering hyper-v? Microsoft has come a long way and is now becoming more popular as a serious contender in the hypervisor area. My preference is still VMware, but some businesses may find their Microsoft allegiance makes hyper-v a valid option.

Note, i do not consider Microsoft a “cheaper” solution in any circumstance. The current state of hyper-v, SDN options, clustering and VMM management falls very short of what VMware has out of the box. Anyhow, if you do choose windows, here is how you remove the GUI – hopefully saving you a little bit of RAM and reducing the running footprint open for attacks and vulnerabilities….

 

 

Powershell commands to convert between the following windows modes;

Full Server -> Server Core with GUI Management (Minimal Server Interface)

Uninstall-WindowsFeature Server-Gui-Shell -Restart

Full Server -> Server Core

Uninstall-Windowsfeature Server-Gui-Mgmt-Infra -Restart

Uninstall-WindowsFeature Server-Gui-Shell -Restart

Server Core -> Full Server

Install-WindowsFeature Server-Gui-Shell -Restart

Server Core with GUI Management (Minimal Server Interface) -> Full Server

Install-WindowsFeature Server-Gui-Shell -Restart

Note : always use windows firewall. If possible also consider AV solution to further protect your hosts.

pc engine – pfsense as router / firewall

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download (1)Just built a pfsense router on  a pc engine to replace my aging 7390 fritzbox…. Very very awesome and fast!

Perfect for UFB (ultra fast broadband) here in New Zealand – FTTH has arrived :)

I’m currently running these services on it (2 x 1GHZ cpu, 4GB RAM, 16GB msata SSD);

  • dhcpd – DHCP server
  • miniupnpd – UPnP server
  • ntpd – NTP server
  • squid – Transparent Proxy & Reverse Proxy
  • snort – IDS (Intrusion Detection System) / IPS (Intrusion Prevention System)
  • ssd – SSH server
  • unbound – DNS Server
  • ipsec – IPsec VPN (site to site VPN)
  • openvpn – Open VPN (client VPN)

Check these links for some great advise…

https://mateh.id.au/2014/09/build-awesome-apu-based-pfsense-router/

http://www.smallnetbuilder.com/other/security/security-howto/31406-build-your-own-ids-firewall-with-pfsense

http://homeservershow.com/building-your-own-super-router-with-pfsense-and-untangle.html

Grab hardware here – http://www.pcengines.ch/apu.htm

IMG_5305

Creating a .pem with the Private Key and Entire Trust Chain

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download (3)You may find you install a SSL cert, but certain browsers show the connection as unsafe (i.e. mobile browser has issues but desktop browsers are happy)

This generally points to not having the cert chain correct. You can check your cert chain at sites like –

https://ssltools.websecurity.symantec.com/checker/views/certCheck.jsp

https://www.sslshopper.com/ssl-checker.html

 

  1. Download your Intermediate and Primary Certificates.
  2. Open a text editor (such as notepad) and paste the entire body of each certificate into one text file in the following order:
    1. The Private Key – your_domain_name.key
    2. The Primary Certificate – your_domain_name.crt
    3. The Intermediate Certificate – gd_bundle_g2_g1.crt
    4. The Root Certificate – TrustedRoot.crt

    Make sure to include the beginning and end tags on each certificate. The result should look like this:

    —–BEGIN RSA PRIVATE KEY—–
    (Your Private Key: your_domain_name.key)
    —–END RSA PRIVATE KEY—–
    —–BEGIN CERTIFICATE—–
    (Your Primary SSL certificate: your_domain_name.crt)
    —–END CERTIFICATE—–
    —–BEGIN CERTIFICATE—–
    (Your Intermediate certificate: DigiCertCA.crt)
    —–END CERTIFICATE—–
    —–BEGIN CERTIFICATE—–
    (Your Root certificate: TrustedRoot.crt)
    —–END CERTIFICATE—–

    Save the combined file as your_domain_name.pem. The .pem file is now ready to use.