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OpenWRT TTL manipulation on a travel router explained

Setting the TTL to 65 can help solve OpenWRT hotel captive portal issues on a travel router because of the way captive portals often track and manage connected devices.

Here’s an explanation of the key reasons:

Device Differentiation:
Captive portals typically recognize and manage devices based on their MAC addresses and IP addresses. When you connect a device (like a laptop or phone) directly to the hotel's network, the captive portal captures the MAC address of that device and redirects it to a login page.

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ESPeasy rules
//GIO14 == Relay 1 = blauw
//GPIO12 == Relay 2 = geel
//GPIO13 == Relay 3 = oranje

on IGNITION do
  // Close relays contacts 
  gpio,14,1 
  gpio,13,1
  timerSet 1,1 // 1 second delay

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ask_password:
	@$(eval PASSWORD=$(shell stty -echo; read -p "Password: " pwd; stty echo; echo $$pwd)) 
  echo $(PASSWORD)

ask_password_twice:
	while true; do \
	    read -s -p "Password: " password; \
	    echo; \
	    read -s -p "Password (again): " password2; \

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#!/bin/bash

# Change to current dir.
cd "$(pwd)"

# Check if a parameter is given                                                 
if [[ -e $1 ]]                                                                  
then  # if a selection is found, just count the files in that selection         
    files="$1"                                                                  
    total=$(ls "$files" | wc -l)                                                

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# export private keys
gpg --export-secret-keys --armor > gpg-private.keys

# import private keys
gpg --import gpg-private.keys

# export public keys
gpg --export --armor > gpg-public.keys

# import public keys

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# Put in ~/.bashrc | then source ~/.bashrc
if [[ -z "${TMUX}" ]] && [[ "${UID}" != 0 ]]; then
  tmux new-session -A -s 0
fi

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# Controlling my Buva Qstream ventilation system using:
# * A Wemos D1 mini lite (an ESP8266 based board)
# * A Wemos power shield so I can power the Wemos from the ventilation units 12V supply.
# * A simple PWM to 10V convertor like this: https://www.cheaptech.nl/pwm-signaal-te-voltage-converter-1-3-khz-0-10-v-pw.html
# * The amazing ESPHome firmware tool: https://esphome.io
# * Home Assistant to tie it all together: https://www.home-assistant.io
#
# I used to use a Raspberry Pi and some Python code for this. See https://gist.github.com/SqyD/a927ab612df767a0cc892bcde23d025c
# The Wemos approach seems more stable and doesn't require external USB power.

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# Bram van Dartel: Fix WSL2 network connection after setting up a Cisco Anyconnect VPN.
# Boot your laptop, start Docker and WSL2, setup a Cisco Anyconnect VPN connection, run this fix.

function Fix-WSLNet {
    if (!([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")) { Start-Process powershell.exe "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`"" -Verb RunAs; exit }
    Get-NetIPInterface -InterfaceAlias "vEthernet (WSL)" | Set-NetIPInterface -InterfaceMetric 1
    Get-NetAdapter | Where-Object { $_.InterfaceDescription -Match "Cisco AnyConnect" } | Set-NetIPInterface -InterfaceMetric 6000
}

Fix-WSLNet

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The purpouse is to have a WireGuard server running with a configuration for 2 clients to connect to the WireGuard server.

Installation - First steps

Follow the instructions for downloading and installing the WireGuard package here: https://github.com/WireGuard/wireguard-vyatta-ubnt

curl -OL https://github.com/WireGuard/wireguard-vyatta-ubnt/releases/download/${RELEASE}/${BOARD}-${RELEASE}.deb
sudo dpkg -i ${BOARD}-${RELEASE}.deb

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#!/bin/python2s

# Symbolic name, meaning all available interfaces
VAR_HOST = ""
# Arbitrary non-privileged port
VAR_PORT = 9003

import socket
import sys