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Re: Sidewinder G2


From: Valdis.Kletnieks () vt edu
Date: Wed, 19 Nov 2003 00:06:50 -0500

On Tue, 18 Nov 2003 14:49:14 MST, you said:
So if you have a HTTP application level proxy does that mean you are
running a webserver ?

Please read RFC821 and/or 2821.  'SMTP Server' basically refers to *anything*
that's the server end of an SMTP conversation (RFC2821, section 2.1):

   An SMTP server may be either the ultimate destination or an
   intermediate "relay" (that is, it may assume the role of an SMTP
   client after receiving the message) or "gateway" (that is, it may
   transport the message further using some protocol other than SMTP).
   SMTP commands are generated by the SMTP client and sent to the SMTP
   server.  SMTP replies are sent from the SMTP server to the SMTP
   client in response to the commands.

Also, RFC2616 says this about HTTP proxies in section 1.3:

   proxy
      An intermediary program which acts as both a server and a client
      for the purpose of making requests on behalf of other clients.
      Requests are serviced internally or by passing them on, with
      possible translation, to other servers. A proxy MUST implement
      both the client and server requirements of this specification. A

So yes, if you're running a proxy, it *MUST* function as a server.

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