Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am testing the timeout handling for an outbound CURL in a PHP app I am developing after an outage at an affiliate brought down my site. I am looking for a way to intentionally slowdown or permanently stall outbound connections to a specific IP address so I can tune my timeout schema. Is there any way to do this?

share|improve this question

migrated from Jul 14 '11 at 2:00

This question came from our site for professional and enthusiast programmers.

The linux traffic shaper, although normally used to enforce QoS, is also perfect to degrade connections arbitrarily.

share|improve this answer

To completely block traffic you could do an iptables drop command for the outbound traffic to that dst address.


iptables -A OUTPUT --dst -j DROP
share|improve this answer

The Charles proxy server can do connection throttling, e.g. artificially increasing the latency or limiting the bandwidth. Install it and use the cURL CURLOPT_PROXY option to point PHP to the proxy server.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.