1.xx
- ERR_READ_TIMEOUT
(Generally the HTTP request/response timed out when Akamai tried fetching content from origin. Default read timeout is 120s)
3.xx
- ERR_READ_ERROR
(Generally the TCP connection from Akamai to origin was successful but the origin did not send any (valid) HTTP response headers back)
4.xx
- ERR_WRITE_ERROR
(Usually happens when connection is closed by origin before Akamai could send the complete request)
6.xx
- ERR_CONNECT_FAIL
(When Akamai is trying to connect to origin, the origin or a firewall is actively refusing the connection - e.g. it sent a TCP RST packet)
9.xx
- ERR_INVALID_URL
(The Akamai Edge server does not have a configuration file associated for the host/URL visited)