raresteak’s gists

raresteak / update_time_from_web.sh

Last active August 11, 2019 16:52

Time sync over http

	#!/bin/bash
	# Sync time from HTTP response. update_time_from_web.sh

	# Fix system time from retrieved webpage off of Internet.
	# I need to do it this way because the system only has outbound http/s access
	# to a couple websites and no outbound access to a time server.
	# Use any highly available reference website.
	SITE="http://www.openntpd.org/"
	HTTP_PROXY=http://webproxy:port
	HTTPS_PROXY=http://webproxy:port

raresteak / gist:837e5fb4c1ac53ee5aad2ce604f4c566

Created August 11, 2019 16:59

nmap scan

nmap -Pn -sS -sV -sC -p- -oA IP-out IP

raresteak / Work_around_to_problems_decrypting_TLS_traffic_in_Wireshark.txt

Created August 24, 2019 14:27

Work around to problems decrypting TLS traffic in Wireshark

	If you're having a problem decoding TLS traffic in Wireshark due to TLS 1.3 perfect forward secrecy then lower your browser's max TLS version.

	In Linux configure ssl key logging
	1. Open terminal,
	export SSLKEYLOGFILE=/tmp/sslkeylog.log

	2. Launch firefix from the same terminal.
	firefox &
	or
	firefox-esr

raresteak / gen_random_time.sh

Created November 15, 2019 14:55

A short Bash script to generate a random time in 24 hour format.

	#!/bin/bash
	# Generate a random time in 24H format
	# Requires Bash because using builtin Random function
	# Author: raresteak

	HOUR=$(echo $(($RANDOM % 124)) )
	while [ $HOUR -lt "100" ]; do
	HOUR=$(echo $(($RANDOM % 124)) )
	done
	RHOUR=$(echo $HOUR \| sed 's/^1//g')

raresteak / udp_listener.sh

Created November 15, 2019 21:38

Persistent UDP listener

	#!/bin/bash
	# Create a persistent self restarting udp listener to recover from client disconnects
	# Usage:
	# nohup /path/to/udp_listener.sh &

	PORT=60000
	RESTART=600

	while : ; do
	/bin/netcat -u -l ${PORT} >> /path/to/output/file &

raresteak / generate_random_time.ps1

Created December 13, 2019 11:38

Generate a random time using Powershell

	<#
	.SYNOPSIS
	Create a random time in 24 hour format

	.OUTPUTS
	Outputs time to standard out.

	.NOTES
	Version: .1
	Author: raresteak

raresteak / gist:69d9057cbcc0c848aa685843bbdfdf45

Created February 6, 2020 18:58

Tail a file and perform some action when keyword is found

tail --retry -s 2 -f /var/log/apache2/access.log | grep --line-buffered 404 | while read ; do echo "404 keyword found, $(doSomeCommand)" ; done

raresteak / gist:219578890310acaf7cc472589461c1a4

Last active February 6, 2020 20:36

Wiping out your bash session history

	export HISTSIZE=0
	export HISTFILE=/dev/null

raresteak / wipeFreeSpace.sh

Last active January 22, 2021 20:40

Linux: Wiping free space

	# requires shred
	dd if=/dev/urandom of=junk bs=1M; shred -v -u -n 1 junk

raresteak / html_picture_embed.sh

Last active March 5, 2020 14:43

Create self contained html files with embedded images

	#!/bin/bash
	# Create self contained html files with embedded images
	# Usage
	# ./html_picture_embed.sh picture.png > html_file.html
	# Example https://pastebin.com/K3dDXjfA
	PIC=$1
	echo -n '<html><img src="data:image/png;base64,'
	base64 $PIC \| tr -d '\n'
	echo '"></html>'