# 11201: TCP connection timed out

Log Level: ERROR

## Description

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