Gustavo RV 86 gustavorv86

gustavorv86 / iptables.conf

Last active September 7, 2022 12:05

Default iptables configuration.

	#!/bin/bash

	iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
	iptables -A INPUT -i lo -s 127.0.0.1 -d 127.0.0.1 -j ACCEPT

	iptables -P INPUT DROP
	iptables -P FORWARD DROP
	iptables -P OUTPUT ACCEPT

gustavorv86 / logger.py

Last active January 4, 2023 09:44

Python3 logging example


	import logging
	import os


	LOG_ENVIRON = "LOGLEVEL"
	LOG_LEVEL_DEFAULT = logging.INFO
	LOG_FILE = "/tmp/myapplication.log"
	LOG_FORMAT = '%(asctime)-15s [%(levelname)s] %(message)s'
	LOG_NAME = "myapplication"

gustavorv86 / systemd_simple.service

Created October 7, 2021 08:04

Systemd simple service unit file

	[Unit]
	Description=My service Daemon
	After=network.target

	[Service]
	Type=simple
	Restart=always
	RestartSec=5
	User=root
	WorkingDirectory=/opt/myservice

gustavorv86 / argparse_example.py

Last active February 4, 2022 07:58

Python Argparse example

gustavorv86 / br0.conf

Last active May 17, 2021 15:05

Mount bridge in Debian GNU/Linux to connect virtual machines

	## /etc/network/interfaces.d/br0.conf
	## Requirements: bridge-utils
	## More info: https://wiki.debian.org/KVM

	auto br0
	iface br0 inet static
	address 192.168.1.2
	netmask 255.255.255.0
	gateway 192.168.1.1
	network 192.168.1.0

gustavorv86 / 10-persistent-net.link

Last active May 17, 2021 15:02

Change network interface name in Debian GNU/Linux 10 (buster)

	## /etc/systemd/network/10-persistent-net.link
	## More info: https://wiki.debian.org/NetworkInterfaceNames

	[Match]
	MACAddress=00:11:22:33:44:55

	[Link]
	Name=eth0

gustavorv86 / exos-bash.py

Created April 29, 2021 08:26

Execute a BASH shell on EXOS Extreme Switches (aka ExtremeXOS)

	#!/usr/bin/env python
	#
	# On EXOS shell create exos-bash.py.
	#
	# EXOS> edit script exos-bash.py
	#
	# Copy this entire content to exos-bash.py file.
	#
	##################################

gustavorv86 / openssl.cnf

Last active March 6, 2021 12:18

Create RootCA OpenSSL Self-Signed certificate from local web development applications.

	## Run this command (change server01.domain.local from your server):
	## openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -sha256 -config ./openssl.cnf -keyout /etc/ssl/private/server01.domain.local.key -out /etc/ssl/certs/server01.domain.local.crt

	## Install the generated /etc/ssl/certs/server01.domain.local.crt on your computers and mobiles on Thrusted Root Certification Authorities store.

	## Run this command to generate NGINX dhparam.
	## openssl dhparam -out /etc/nginx/dhparam.pem 4096

	[req]
	distinguished_name = req_distinguished_name

gustavorv86 / all_network_adresses_from_ip_and_netmask.py

Last active December 7, 2020 16:46

Calculate all network IP adresses from a IP and a netmask

	#!/usr/bin/env python3

	import struct
	import socket


	def ip2int(addr):
	return struct.unpack("!I", socket.inet_aton(addr))[0]

gustavorv86 / rest-time.py

Last active February 16, 2020 22:17

Pythonic Rest time service using Flask