RE: Reverse proxy ??

[fernando_montenegro () hp com]

Hi all!

I might be waaay off base here, but I always thought that in MS parlance,  
"reverse proxy" actually means accepting INBOUND connections to servers.

So, if I have an Exchange server that acts as a POP3/IMAP4 server, my MS Proxy  
Server "firewall" will need to "reverse proxy" the POP3/IMAP4 port back to the  
Exchange server.

If you're familiar with application level firewalls, this is what Axent calls  
the "GSP" (Generic service passer) or what Gauntlet does with pop3-gw, plug-gw,  
...

Hope I didn't add more confusion to the topic...

Cheers,
Fernando
--
Fernando da Silveira Montenegro     Hewlett-Packard Brasil
HP Consulting - Internet Security   Al. Rio Negro, 750 - Alphaville
mailto:fernando_montenegro () hp com   Barueri, SP - Brazil 06454-000
voice: +55-11-7297-4351             #include <disclaimer.h>


-----Original Message-----
From: etoll () syracusesupply com [mailto:etoll () syracusesupply com]
Sent: Terça-feira, 2 de Novembro de 1999 15:11
To: joe () joesnet com
Cc: etoll () syracusesupply com; firewall-wizards () nfr net
Subject: RE: Reverse proxy ??


I feel no one has clearly said what a Reverse Proxy is.

Proxy: is a entity which takes client requests,  
goes and gets it on the net and saves it to its disk, (in case anyone else  
wants the same item - caching)  
then serves it up to the client.  (FTP, WWW, etc)

Reverse Proxy:   Gee wilickers I've got 200+ users going out to a large web  
site all the time.  I know
what to do, I'll cache the whole site  and I'll tell the proxy server (on my  
users behalf) to  
go out and start copying the whole entire site at midnight, tell it not to  
expire for 4 days, and save all this  
info to the proxy servers disk array.  Now when everyone starts hitting this  
particular site,  the content
is served up via high speed local net, instead of going out across the internet  
connection.


Walter is right, I just thought I'd provide a real world example.



> > > "Joe Ippolito" <joe () joesnet com> 10/31/99 09:33PM >>>
which may actually be more than one web server behind your firewall acting
in a round-robin mode?

-----Original Message-----
From: owner-firewall-wizards () lists nfr net  
[mailto:owner-firewall-wizards () lists nfr net]On Behalf Of Walter Boyd
Sent: Saturday, October 30, 1999 3:02 AM
To: firewall-wizards () nfr net  
Subject: Re: Reverse proxy ??


Reverse Proxy, sometimes referred to as Web Acceleration, is the capability
of taking an address outside your firewall, mapping it to a web server
inside the firewall, and performing transparent caching of the web servers'
static content in the process. The DNS address for the web server is the
proxy address outside the firewall.

Walter Boyd
http://www.certifiednets.com/  

> > > Sandy Green <sand232 () yahoo com> 10/28/99 05:27PM >>>
There was a quetion here in this list about MS Proxy
server with one or two NIC cards. In that context it
was highlighted that with one NIC card "reverse
proxy" will not be possible.

But can someone explain as to what is reverse proxy ?






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