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@procrastinatio
procrastinatio / haproxy_rate_limiting.md
Created October 25, 2017 06:04
Rate limiting with HAproxy

Introduction

So HAProxy is primalery a load balancer an proxy for TCP and HTTP. But it may act as a traffic regulator. It may also be used as a protection against DDoS and service abuse, by maintening a wide variety of statistics (IP, URL, cookie) and when abuse is happening, action as denying, redirecting to other backend may undertaken ([haproxy ddos config], [haproxy ddos])

@tvlooy
tvlooy / tcpdump-es-capture
Created June 26, 2017 11:29 — forked from z0mbix/tcpdump-es-capture
Capture Elasticsearch Queries
# tcpdump -A -nn -s 0 'tcp dst port 9200 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' -i lo
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on lo, link-type EN10MB (Ethernet), capture size 65535 bytes
14:32:33.525122 IP 127.0.0.1.49777 > 127.0.0.1.9200: Flags [P.], seq 313752908:313753888, ack 2465010394, win 257, options [nop,nop,TS val 2684167067 ecr 2684167066], length 980
E...^.@.@............q#...}L...............
..#...#.GET /index/_search HTTP/1.1
Host: 127.0.0.1:9200
Accept: */*
Content-Length: 845
Content-Type: application/x-www-form-urlencoded
@tvlooy
tvlooy / get_dns_blacklists.sh
Last active September 9, 2019 03:33
Block ads by DNS
#!/bin/sh
# "include: /etc/unbound/ad-blacklist.conf" in /var/unbound/etc/unbound.conf
# run this script as a daily cron
#
# The list URLs were taken from the pi-hole project.
# More experimental lists are at https://github.com/pi-hole/pi-hole/blob/master/adlists.default
TMPFILE=$( mktemp get_dns_blacklists-XXXXXXXXX )
trap 'rm -f $TMPFILE; exit 1' EXIT KILL INT QUIT TERM
@albertbori
albertbori / Installation.md
Last active September 28, 2025 19:19
Automatically disable Wifi when an Ethernet connection (cable) is plugged in on a Mac

Overview

This is a bash script that will automatically turn your wifi off if you connect your computer to an ethernet connection and turn wifi back on when you unplug your ethernet cable/adapter. If you decide to turn wifi on for whatever reason, it will remember that choice. This was improvised from this mac hint to work with Yosemite, and without hard-coding the adapter names. It's supposed to support growl, but I didn't check that part. I did, however, add OSX notification center support. Feel free to fork and fix any issues you encounter.

Most the credit for these changes go to Dave Holland.

Requirements

  • Mac OSX 10+
  • Administrator privileges
@ionelmc
ionelmc / watch-sys-block-stat.sh
Last active January 6, 2022 03:32
watch --difference=cummulative --interval=1 '(echo device read_IOs read_merges read_sectors read_ticks write_IOs write_merges write_sectors write_ticks in_flight io_ticks time_in_queue; for file in /sys/block/*/stat; do echo -n $file; cat $file; done) | column -t'
# OUTPUTS:
#device read_IOs read_merges read_sectors read_ticks write_IOs write_merges write_sectors write_ticks in_flight io_ticks time_in_queue
#/sys/block/dm-0/stat 116962 0 2212746 314096 7705653 0 150218536 609670232 0 644428 610921004
#/sys/block/dm-1/stat 116479 0 2208882 313324 7686986 0 150218536 609676068 0 644616 611418072
#/sys/block/dm-2/stat 302 0 2416 780 0 0 0 0 0 148 780
#/sys/block/sda/stat 91181 26273 2217246 74876 7314854 388030 150261802 16954364
@phette23
phette23 / current-dir-in-iterm-tab-title.sh
Last active March 31, 2025 14:56
Set the iTerm tab title to the current directory, not full path.
# put this in your .bash_profile
if [ $ITERM_SESSION_ID ]; then
export PROMPT_COMMAND='echo -ne "\033];${PWD##*/}\007"; ':"$PROMPT_COMMAND";
fi
# Piece-by-Piece Explanation:
# the if condition makes sure we only screw with $PROMPT_COMMAND if we're in an iTerm environment
# iTerm happens to give each session a unique $ITERM_SESSION_ID we can use, $ITERM_PROFILE is an option too
# the $PROMPT_COMMAND environment variable is executed every time a command is run
# see: ss64.com/bash/syntax-prompt.html
@pitch-gist
pitch-gist / gist:2999707
Created June 26, 2012 22:21
HTML: Simple Maintenance Page
<!doctype html>
<title>Site Maintenance</title>
<style>
body { text-align: center; padding: 150px; }
h1 { font-size: 50px; }
body { font: 20px Helvetica, sans-serif; color: #333; }
article { display: block; text-align: left; width: 650px; margin: 0 auto; }
a { color: #dc8100; text-decoration: none; }
a:hover { color: #333; text-decoration: none; }
</style>
@cristianrasch
cristianrasch / gitlab.sh
Created April 22, 2012 01:50
Install Gitlab on Debian Squeeze/Wheezy
aptitude install -y git curl python-dev python-pip redis-server ruby1.9.1-full rubygems1.9.1
aptitude install -y mysql-server libmysqlclient-dev
adduser --system --shell /bin/sh --gecos 'git version control' --group --disabled-password --home /home/git git
adduser --disabled-login --gecos 'gitlab system' gitlab
usermod -a -G git gitlab
su - gitlab
ssh-keygen -q -N '' -t rsa -f /home/gitlab/.ssh/id_rsa
aptitude install gitolite
cp /home/gitlab/.ssh/id_rsa.pub /home/git/gitlab.pub
su - git
@bbatsov
bbatsov / devise.bg.yml
Created March 12, 2012 13:12
Bulgarian translations for Devise
# Additional translations at https://github.com/plataformatec/devise/wiki/I18n
bg:
errors:
messages:
expired: "е изтекъл, моля заявете нов"
not_found: "не е намерен"
already_confirmed: "е вече потвърден, моля опитайте да влезете в профила си с него"
not_locked: "не бе заключен"
not_saved:
@rstacruz
rstacruz / index.md
Last active August 2, 2025 18:42
Rails models cheatsheet

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one