kalebo

What

A lot of times you are developing a web application on your own laptop or home computer and would like to demo it to the public. Most of those times you are behind a router/firewall and you don't have a public IP address. Instead of configuring routers (often not possible), this solution gives you a public URL that's reverse tunnelled via ssh to your laptop.

Because of the relaxation of the sshd setup, it's best used on a dedicated virtual machine just for this (an Amazon micro instance for example).

Requirements

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
H: preserves hard-links
A: preserves ACLs

	#########################################################################
	# #
	# Script to set or clear read-only flag of an NTFS volume. #
	# #
	# Usage: .\set-ntfs-ro.ps1 set "MY DISK LABEL" #
	# .\set-ntfs-ro.ps1 clear "MY DISK LABEL" #
	# #
	# Author: Muhammed Demirbas, mmdemirbas at gmail dot com #
	# Date : 2013-03-23 #
	# #

	all:
	gcc light.m -std=c99 -framework Foundation -framework IOKit -o light

	clean:
	rm -f light

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	# Monitoring on interface eth0
	tcpdump -i eth0 -n port 67 and port 68