jason schaefer . com

Category: documentation

  • Migrating SMSSecure (Silence) keys and texts

    —

    by

    jason
    in , , ,

    For those unfamiliar: SMSSecure (now called Silence) is a text messaging application that supports encryption. It has exceptional integration on your phone and will handle your non-encrypted friends acquaintances texts as well. https://smssecure.org I recommend using fdroid to install it. F-droid is a Free Software repository for Android. https://f-droid.org UPDATE: You can now export an…

  • OpenVPN on VyOS

    —

    by

    jason
    in , , ,

    OpenVPN Client/Server Implemenation ==== key signing ==== You can host the certificate authority on the vyos device itself. This is obviously not as secure as hosting it on a separate system. If someone was to get into the vyos they would have access to all your keys and would be able to sign new keys…

  • OpenVPN on the OpenWRT

    —

    by

    jason
    in ,

    This outlines a typical VPN implementation with server, clients and routing. Using Attitude Adjustment 12.09. Although, this should work on any new version of OpenWRT. Last tested on version 17. Start by ssh’ing into the router and installing packages. root@myWRT:~# opkg update root@myWRT:~# opkg install openvpn-openssl openvpn-easy-rsa Create a “openvpnconfig” directory under config and move…

  • Simple tracking of top memory users over time

    —

    by

    jason
    in ,

    I have a Dreamhost VPS account and have been running out of memory and experiencing the dreaded forced reboots dh impose. I found it difficult to identify the offending sites that take up all that memory on my server. Every time I login and run top it was too late or I would find a…

  • Random Tech Notes

    —

    by

    jason
    in ,

    Here are some random notes that I find useful. I also tend to forget and use as reference. == LINKS == iproute2 cheat sheet by dmbaturin http://baturin.org/docs/iproute2/ The MTU/MSS calculator, encapcalc Speedtests The BEST -> http://www.dslreports.com/speedtest https://www.speedtest.net http://compari.tech/speed SpeedOf.Me bandwidthplace.com data transfer calculator http://techinternets.com/copy_calc [] Vim reference :e filename (open filename) :q! (quit, don’t save)…

  • Installing OpenVPN client on Windows

    —

    by

    admin
    in , ,

    These are the manual instructions for installing and configuring OpenVPN client. After having many problems over the years with openvpn gui breaking, I have devised a reliable work around. Create the following batch script, name it something like ovpnConnect.bat, and right click to “Run as Administrator”. This does require the openvpn gui from openvpn.net to…

  • Flashing a BIOS update using only free tools (FreeDOS, etc)

    —

    by

    jason
    in ,

    The wonderful world of motherboard BIOS updates, is still old fashioned. Updates are often still built for Microsoft Windows environments. Those of us who don’t have MS Windows, DOS, a floppy drive, an install of Windows 98 to create a bootable floppy, or cheesy Pâté for that matter ….. Here is a way one can…

  • Transition away from MBR to GPT booting

    —

    by

    jason
    in ,

    Recently, I was installing debian on a new server and grub2 would not install gave me this error: “This GPT partition label has no BIOS Boot Partition; embedding won’t be possible! grub-setup: error: Embedding is not possible, but this is required when the root device is on a RAID array or LVM volume.” Of course,…

  • Thunderbird & Lightning | contacts, calendar, mail syncing for gmail

    —

    by

    admin
    in

    . Automatic email setup add-on: Gmail IMAP Account Setup THUNDERBIRD VERSION 3 HAS NATIVE SUPPORT FOR GMAIL. Manual email instructions: Setup Thunderbird according to gmail’s imap instructions At the bottom of gmail’s instructions you will see “recommended settings“. Don’t follow the first recommendation, regarding deleting. Instead of actually (permanently) deleting email we can have it…

  • Spoof MAC address in Windows or gnu/linux

    —

    by

    jason
    in , ,

    start -> run -> regedit make a backup, if you want. goto: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318} look through the list of subkeys (0000, 0001, etc) DriverDesc keyword will tell you which network adapter. For example, “NVIDIA nForce Networking Controller” when you find it, right click and add -> new -> string value new keyword: Value Name: = NetworkAddress…

  • Linux-Libre and Realtime patch

    —

    by

    jason
    in ,

    I wanted to share some notes on patching the Linux Libre kernel with realtime capabilities. The Linux-Libre project pulls out all the un-free bits from standard Linux. Contrary to popular belief, Linux has many non-free parts, small binary or obfuscated pieces of code for various hardware. I have a Lenovo T61 laptop. I removed the…