Fluepke

Vodafail

This will become a short tutorial on how to achieve higher bandwidth on a residential (german) Vodafone DOCSIS internet connection.

A flaw in Vodafone's modem activation process allows for simultanous operation of two modems on one contract:

• Vodafone-owned CPE (e.g. "Vodafone Station")
• Customer CPE (TC4400, Fritz?!Box 6660, etc.)

On a low-loaded DOCSIS 3.1 segment, I am able to achieve 1900 MBit/s download and 95 MBits/ upload bitrate by bundling both modems using MPTCP

Fluepke

#!/bin/bash

# Database parameters
HOST="crt.sh"
PORT="5432"
USER="guest"
DB="certwatch"

# File to store the data
OUTPUT_FILE="certificates.csv"

Fluepke

#!/bin/bash

if ! command -v curl &> /dev/null; then
	echo "This script needs curl. Please install curl."
	exit -1
fi

if ! command -v jq &> /dev/null; then
	echo "This script needs jq. Please install jq."
	exit -1

Fluepke

#!/bin/env python

import tweepy
import sys
from tqdm import tqdm

print(f"Nuking {sys.argv[1]}")

consumer_key = '<redacted>'
consumer_secret = '<redacted>'

Fluepke

Fluepke

; <<>> DiG 9.18.1 <<>> axfr govdigital.de @ns-govdigital.akdb.de.
;; global options: +cmd
govdigital.de.		28800	IN	SOA	dns.lvr.govdigital.de. admin-tech-c.regioit.de. 207 10800 3600 2419200 900
govdigital.de.		300	IN	A	217.160.41.129
govdigital.de.		300	IN	MX	10 govdigital-de.mail.protection.outlook.com.
govdigital.de.		28800	IN	TXT	"v=spf1 include:spf.protection.outlook.com -all"
govdigital.de.		28800	IN	TXT	"MS=ms78731993"
govdigital.de.		28800	IN	NS	dns.lvr.govdigital.de.
govdigital.de.		28800	IN	NS	ns-govdigital.akdb.de.

Fluepke

Fluepke

Use non local IPv6 with GoLang (e.g. to bypass Ratelimit)

You need:

• IPv6 addresses (and a static route)
• A "to local" route
• The address range configured on the loopback interface
• net.ipv6.ip_nonlocal_bind=1

Fluepke

; <<>> DiG 9.16.21 <<>> axfr 219.185.195.in-addr.arpa @91.189.192.6
;; global options: +cmd
; Transfer failed.

Fluepke

Use Adobe Acrobat or Okular to view the PDF. pdf.js does not work.

Steps to reproduce

# Download some gif
curl 'https://media4.giphy.com/media/mCCpMOJCiiLbdBWuv3/giphy.gif' > some.gif

# Split into single frames
mkdir output
convert -coalesce +adjoin some.gif output/tmp.png