cbluth

sudo apt update && sudo apt upgrade

sudo apt install golang
sudo apt-get install libmnl-dev libelf-dev build-essential pkg-config

git clone https://git.zx2c4.com/wireguard-go
cd wireguard-go/
git checkout 0.0.20181001 # Get the desired release tag from `git tag`
make
sudo make install

cbluth

Create a folder to store the databases :

mkdir -p /usr/share/GeoIP

Download Country IP database

wget http://geolite.maxmind.com/download/geoip/database/GeoLiteCountry/GeoIP.dat.gz
gunzip GeoIP.dat.gz

cbluth

wget -qO- https://check.torproject.org/exit-addresses | grep ExitAddress | cut -d ' ' -f 2 | sed "s/^/deny /g; s/$/;/g" > /etc/nginx/conf.d/tor-block.conf; systemctl reload nginx

cbluth

// Implementation of a UDP proxy

package main

import (
	"flag"
	"fmt"
	"log"
	"net"
	"os"

cbluth

package main

import (
	"fmt"
	"io"
	"net"
	"time"
)

func main() {

cbluth

// fileResponseWriter wraps an http.ResponseWriter and a File
// passing it to an http.Handler's ServeHTTP
// will write to both the file and the response.

type fileResponseWriter struct {
	file  io.Writer
	resp  http.ResponseWriter
	multi io.Writer
}

cbluth

package main

import (
	"bytes"
	"log"
	"sort"
)

// implement `Interface` in sort package.
type sortByteArrays [][]byte

cbluth

DHT Walkthrough Notes

I've put together these notes as I read about DHT's in depth and then learned how the libtorrent implementation based on the Kademlia paper actually works.

What problem does this solve?

400,000,000,000 (400 billion stars), that's a 4 followed by 11 zeros. The number of atoms in the universe is estimated to be around 10^82. A DHT with keys of 160 bits, can have 2^160 possible numbers, which is around 10^48

cbluth

#!/usr/bin/env bash

apt remove --purge wazuh-agent -y ; curl -so /tmp/wazuh-agent.deb \
    'https://packages.wazuh.com/3.x/apt/pool/main/w/wazuh-agent/wazuh-agent_3.11.3-1_amd64.deb'
sudo WAZUH_MANAGER_IP='wazuh.example.org' dpkg -i /tmp/wazuh-agent.deb
sed -i \
    's#<protocol>udp</protocol>#<protocol>tcp</protocol>#' \
    /var/ossec/etc/ossec.conf
systemctl restart wazuh-agent.service

cbluth

// Copyright (c) 2017 Ismael Celis

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all