Hi, While working on Flumotion I've realized there are quite a few conditions in real-life networks that I need to deal with and my experience is fairly limited. What can I say, I lived in a perfect world before :) All sorts of things trip up our application: machine lockups (where the other end doesn't realize the connection is broken), temporary routing problems, adsl connections being dropped, ... After doing a lot of ad-hoc hacking to solve all those issues, I've realized I'd better work on my understanding of the problem first, and see how twisted behaves under these conditions, and what can be done. I'm sure other people writing networked apps have gone through similar issues, so what I'd like to know is: - are there any good resources that explain all of the things that could go wrong, what sort of conditions are similar (e.g. I assume you can use iptables rules to simulate routing problems), which I need to worry about, ... Any good networking overview book I should be taking to heart ? - have people done this sort of thing with Twisted ? - are there any tools people are familiar with to simulate networking problems ? In the case of machine lockup, my best idea right now for example is to actually have a vmware virtual host lock up its kernel with a silly kernel module. Any help is appreciated, Thomas Dave/Dina : future TV today ! - http://www.davedina.org/ <-*- thomas (dot) apestaart (dot) org -*-> Another Love Song That is written Still nothing said <-*- thomas (at) apestaart (dot) org -*-> URGent, best radio on the net - 24/7 ! - http://urgent.fm/