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Joao Poupino poupas

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@mildsunrise
mildsunrise / arithmetic.py
Last active December 10, 2023 23:47
Integer (and polynomial) modular arithmetic for Python!
"""
INTEGER MODULAR ARITHMETIC
These functions implement modular arithmetic-related functions (Z/nZ).
As an implied precondition, parameters are assumed to be integers unless otherwise noted.
This code is time-sensitive and thus NOT safe to use for online cryptography.
"""
from typing import Iterable, Tuple, NamedTuple
from functools import reduce
@mhofman
mhofman / HAProxy-transparent-web-services-routing.md
Last active April 4, 2024 01:20
Leverage HAProxy to transparently route requests to web services identified by host name.

Web Service Fronting

Multiple Web properties on a single IP address

Hosting multiple websites on a single public IP address on the standard HTTP(S) ports is relatively easy with popular web servers like Apache, Nginx and lighttpd all supporting Virtual Hosts.
For Web Services which bundle their own HTTP server, things get more complicated, unless their HTTP stack can be shared somehow. More often than not, the application's HTTP stack listens directly on a dedicated TCP port.

Hosting multiple services on a single IP then requires using a fronting server listening on the standard HTTP port, and routing to the right backend service based on the host name or the path sent by the client.
Path based routing is cumbersome, usually requiring either the service to be aware of the path prefix, or a rewrite by the HTTP fronting server of all absolute URLs in the requests and responses.
Hostname based routing is more straightforward. The fronting server can just look at the [HTTP/1.1 Host header](https://tools

@ricardojba
ricardojba / windows_hardening.cmd
Last active April 28, 2024 16:59
A Windows hardening script
::##########################################################################################################################
::
:: This script can ruin your day, if you run it without fully understanding what it does, you don't know what you are doing,
::
:: OR BOTH!!!
::
:: YOU HAVE BEEN WARNED!!!!!!!!!!
::
:: This script is provided "AS IS" with no warranties, and confers no rights.
:: Feel free to challenge me, disagree with me, or tell me I'm completely nuts in the comments section,
@Luzifer
Luzifer / README.md
Last active November 18, 2023 17:22
Running docker-compose as a systemd service

Running docker-compose as a systemd service

Files

File Purpose
/etc/compose/docker-compose.yml Compose file describing what to deploy
/etc/systemd/system/docker-compose-reload.service Executing unit to trigger reload on docker-compose.service
/etc/systemd/system/docker-compose-reload.timer Timer unit to plan the reloads
/etc/systemd/system/docker-compose.service Service unit to start and manage docker compose
@iMilnb
iMilnb / README.md
Last active January 18, 2024 08:08
AWS Terraform configuration: Stream CloudWatch Logs to ElasticSearch

Rationale

This snippet is a sample showing how to implement CloudWatch Logs streaming to ElasticSearch using terraform. I wrote this gist because I didn't found a clear, end-to-end example on how to achieve this task. In particular, I understood the resource "aws_lambda_permission" "cloudwatch_allow" part by reading a couple of bug reports plus this stackoverflow post.

The js file is actually the Lambda function automatically created by AWS when creating this pipeline through the web console. I only added a endpoint variable handling so it is configurable from terraform.

@varqox
varqox / install_debian_with_debootstrap_howto.md
Last active April 14, 2024 21:18
Instructions how to install Debian using debootstrap
@heri16
heri16 / bgpd.conf
Last active February 21, 2023 05:40
AWS VPC VPN StrongSwan Virtual Tunnel Interface (VTI)
#@ /etc/quagga/bgpd.conf (Centos & Ubuntu)
hostname <Local OS hostname>
password <Any random phrase>
enable password <Any random phrase>
!
log file /var/log/quagga/bgpd
!debug bgp events
!debug bgp zebra
debug bgp updates
@saghul
saghul / CA.cert
Created January 22, 2013 23:24
pyuv + OpenSSL example
-----BEGIN CERTIFICATE-----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