Accessing Web site via Cloud SWG fails with the Verdict : gateway_error

Products

• Cloud Secure Web Gateway - Cloud SWG

Issue/Introduction

Accessing Web site via Cloud SWG fails. Access log shows the Verdict : gateway_error and the Action is TCP_ERR_MISS.

Cause

TCP_ERR_MISS indicates "An error occurred while retrieving the object from the origin server."

There are few possible reasons for it:

- The OCS does not allow the connection from the CSWG. 

- OCS is down

- domain name, port protocol are inaccurate

Resolution

1. Make sure the domain name, port and protocol are accurate.

2. Contact the OCS admins to allow the connection from the Cloud SWG. Use KB as a reference.

Additional Information

Use additional tools to see if the OCS is up from the machine with the direct Internet access:

1. Telnet to make sure OCS is listening on the port you are trying to access:

telnet xxxxxx.xxx 443

2. Other tools such SSL Server Test on the ssllabs.com can verify if OCS is up and listening.