Rate this page:

Thanks for rating this page!

We are always striving to improve our documentation quality, and your feedback is valuable to us. How could this documentation serve you better?

Error 11201

Error - 11201

TCP connection timed out

Twilio cannot establish a TCP connection to your web server. The two attempts to connect to your web server were timed out. Each connection attempt has a 5 second timeout.

Possible Causes

  • firewall in your network blocking incoming TCP traffic
  • network outage between Twilio and your web server
  • invalid host part in the HTTP URL pointing to non-existing host or private IP address

Possible Solutions

  • verify firewall configuration in your network or on the web server
  • verify network connectivity to your web server
  • verify the HTTP URL provided is accessible to the public Internet
Rate this page: