ICAP Client
Next Generation Security Gateway Guide R80.20 | 50
501 Method not implemented. This response is illegal for an
OPTIONS request, because implementation of OPTIONS is
mandatory.
502 Bad Gateway. This is an ICAP proxy, and the proxy operation
produced an error.
503 Service overloaded. The ICAP server has exceeded a
maximum connections limit associated with this service.
The ICAP Client should not exceed this limit in the future.
505 ICAP version not supported by server.
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