SOCKS 5 - Failure behaviour?
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I have read the [RFC1928][1] several times and still couldn't understand what a compliant SOCKS 5 server is supposed to reply in case of failure. This doubt comes from the fact that the ATYP, BND.ADDR and BND.PORT fields from a SOCKS reply simply don't make sense if, for instance, a request with an invalid command is received. Must the server not send these fields or just send blanks?


  [1]: http://www.ietf.org/rfc/rfc1928.txt