Error: 504 Gateway Error You are receiving a 504 Gateway Error
Troubleshooting 504 Gateway Errors
A 504 Gateway Error indicates that the proxy was unable to make a connection to a gateway. Receipt of this error message, or exception, indicates that a connection could not be established to a forwarding or SOCKS gateway. If verification is necessary, a packet capture can be used to verify that the forward host is unresponsive.
A 504 Gateway Error can also be displayed if a loop occurs in a proxy chain. Blue Coat proxies will add a 'Via' header to server side requests which is used to determine if a proxy receives a request that originated from itself. If a proxy receives a request with a 'Via' header that it recognizes it will not propagate the request to prevent the loop. It will instead return a 504 Gateway Error.
Imported Document ID: 000009274
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