benmmurphy

replays last FIN-ACK in order to check if the other side correctly implements TIMED-WAIT. other side should be first to close the connection. with http this can be done in curl by forcing http/1.0 mode.

curl -0 -d 'lolol=lololol' http://TARGET/wtwtwt
tcpdump -S 'tcp port 80' -l | ./replayer.rb TARGET 80 YOUR_HOST_AS_APPEARS_IN_TCPDUMP

Example of it working and showing the other side correctly handling TIMED-WAIT:

root@midway:~# tcpdump -S 'tcp port 80' -l | ./replayer.rb 173.194.41.67 80 ip-10-250-157-181.eu-west-1.compute.internal
OMG IM RUNNING

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

Watson1978

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

davidkellis

brew install apple-gcc42 openssl libyaml libffi
xcode-select --install
export CC=/usr/local/bin/gcc-4.2
export CFLAGS='-g -O2'
export RUBY_CONFIGURE_OPTS=--with-openssl-dir=`brew --prefix openssl`
export CONFIGURE_OPTS=--with-openssl-dir=`brew --prefix openssl`
# I had to edit the svn repo URL in /usr/local/Cellar/ruby-build/20160913/share/ruby-build/1.8.7-p375 and change the URL from http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8_7 to https://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8_7
rbenv install 1.8.7-p375