insdavm

WireGuard over TCP with udptunnel

udptunnel is a small program which can tunnel UDP packets bi-directionally over a TCP connection. Its primary purpose (and original motivation) is to allow multi-media conferences to traverse a firewall which allows only outgoing TCP connections.

Server

# udptunnel -s 443 127.0.0.1/51820

Client

slawekzachcial

This Gist is based on Self Signed Certificate with Custom Root CA gist.

It adds the use of AWS KMS to generate and decrypt the Root CA private key, so that this key does not need to be stored in plaintext. Instead, the key is stored encrypted, and is being decrypted using AWS KMS only when needed.

Create AWS KMS CMK - Done Once

Create symmetic CMK (customer-managed key) and give it an alias of alias/root-ca-encrypting-key that will be used later to reference to it:

FinnWoelm

# Full instructions: http://manpages.ubuntu.com/manpages/bionic/en/man8/mmcli.8.html
# Examples: http://manpages.ubuntu.com/manpages/bionic/en/man8/mmcli.8.html#examples
# Supported modems: https://www.freedesktop.org/wiki/Software/ModemManager/SupportedDevices/

# Get list of connected modems.
mmcli --list-modems
# Output:
# Found 1 modems:
#	  /org/freedesktop/ModemManager1/Modem/1 [huawei] E3531
# The number at the end of the path is the modem index.

artizirk

#!/usr/bin/env python3
# need at least python3.6+ for blake2
from base64 import b64decode
from hashlib import sha256, blake2s
from ipaddress import ip_address, ip_network


# https://github.com/chmduquesne/wg-ip
def gen_ip(pubkey, subnet=ip_network('fe80::/64')):
    """Generate wg-ip compatible addresses from WireGuard public key.

slykar

Dell Fan Control Commands

print temps and fans rpms

ipmitool -I lanplus -H <iDRAC-IP> -U <iDRAC-USER> -P <iDRAC-PASSWORD> sensor reading "Ambient Temp" "FAN 1 RPM" "FAN 2 RPM" "FAN 3 RPM"

print fan info

nwesterhausen

#!/bin/bash
###
# This script utilizes apprise (https://github.com/caronc/apprise) to send notifications
# You need to have apprise available for the user sonarr operates under.
# I installed it via `sudo pip install --system apprise` although the python
# community really dislikes it when you do that. Recommended installation would be
# something along the lines of: 
#
#   sudo su sonarr -s /bin/bash
#   pip install --user apprise

reillysiemens

Signing VirtualBox Kernel Modules

These are the steps I followed enable VirtualBox on my laptop without disabling UEFI Secure Boot. They're nearly identical to the process described on [Øyvind Stegard's blog][blog], save for a few key details. The images here are borrowed from the [Systemtap UEFI Secure Boot Wiki][systemtap].

1. Install the VirtualBox package (this might be different for your platform).

   src='https://download.virtualbox.org/virtualbox/rpm/fedora/virtualbox.repo'

ergoz

#!/bin/sh

UPTIME_DAYS=$(expr `cat /proc/uptime | cut -d '.' -f1` % 31556926 / 86400)
UPTIME_HOURS=$(expr `cat /proc/uptime | cut -d '.' -f1` % 31556926 % 86400 / 3600)
UPTIME_MINUTES=$(expr `cat /proc/uptime | cut -d '.' -f1` % 31556926 % 86400 % 3600 / 60)

cat > /etc/motd << EOF
     %++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%
     %                                                                            %
     %                                WELCOME!                                    %

stokito

grep -H Installed-Size: /usr/lib/opkg/info/*.control | sed 's,^.*/\([^/]\+\)\.control:Installed-Size: *\(.*\),\2\t\1,' | sort -n

miguelmota

# Generate the private and public keys
openssl ecparam -name secp256k1 -genkey -noout | openssl ec -text -noout > key

# Extract the public key and remove the EC prefix 0x04
cat key | grep pub -A 5 | tail -n +2 | tr -d '\n[:space:]:' | sed 's/^04//' > pub

# Extract the private key and remove the leading zero byte
cat key | grep priv -A 3 | tail -n +2 | tr -d '\n[:space:]:' | sed 's/^00//' > priv

# Generate the hash and take the address part