Secure gateway:

This is designed for use by proxies in front of rippled. Configured IPs
can forward identifying user data in HTTP headers, including
user name and origin IP. If the user name exists, then resource limits
are lifted for that session. However, administrative commands are still
reserved only for administrative sessions.

src/ripple/server/impl/Port.cpp

@@ -0,0 +1,49 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2012, 2013 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <ripple/server/Port.h>
+
+namespace ripple {
+namespace HTTP {
+        
+std::ostream&
+operator<< (std::ostream& os, Port const& p)
+{
+    os << "'" << p.name << "' (ip=" << p.ip << ":" << p.port << ", ";
+
+    if (! p.admin_ip.empty ())
+    {
+        os << "admin IPs:";
+        for (auto const& ip : p.admin_ip)
+            os << ip.to_string () << ", ";
+    }
+
+    if (! p.secure_gateway_ip.empty ())
+    {
+        os << "secure_gateway IPs:";
+        for (auto const& ip : p.secure_gateway_ip)
+            os << ip.to_string () << ", ";
+    }
+
+    os << p.protocols () << ")";
+    return os;
+}
+
+} // HTTP
+} // ripple