Re: Is it true that All communication between front-end and back-end servers goes through TCP port 80?

From: Mark Fugatt [MVP] (news_at_4mcts.com)
Date: 06/04/04 

Date: Fri, 4 Jun 2004 15:12:04 -0400

Are you sure of that page number, page 127 of the Deployment Guide that I am
looking at talks about Clustering. 

-- 
Mark Fugatt
Exchange MVP
http://www.exchangetrainer.com
http://www.msexchange.org
"Pavel Nagaev" <pnagaev@yandex.ru_NEWS> wrote in message 
news:O3E73VlSEHA.1308@TK2MSFTNGP10.phx.gbl...
> Dear Mark, what does mean author in these words?
>
> " All communication between front-end and back-end servers goes
> through TCP port 80, regardless of the port used for communication between
> the client and front-end server"
>
> I found it in  Exchange Server 2003 Deployment guide, page 127.
>
>>
>> To configure a clustered back-end server, you must map each front-end
> server
>> to the nodes of your cluster, so that either node can accept proxy
> requests
>> from any front-end server in your organization. Proxy requests are
> requests
>> for messaging services from client computers running Microsoft Outlook®
> Web
>> Access, Outlook Mobile Access, Microsoft Exchange ActiveSync®, POP3, or
>> IMAP4. These proxy requests are sent to the cluster through the front-end
>> servers. All communication between front-end and back-end servers goes
>> through TCP port 80, regardless of the port used for communication 
>> between
>> the client and front-end server.
>
>
>
> -- 
> Best Regards
>
> Pavel Nagaev
>
> Mail server administrator, MCSA/MCSE
> Caspian Pipeline Consortium
> Novorossiysk, Russia
>
> Mobile phone: (8617) 65 09 01
> Office phone:  (8617) 64 25 53 ext. 74046
> Fax: (095) 7975990 ext. 5848
>
> "Mark Fugatt [MVP]" <news@4mcts.com> wrote in message
> news:%23Ffd5lkSEHA.3332@tk2msftngp13.phx.gbl...
>> It uses the protocol that the client is using, so if they connect to the
>> front-end using POP3 then the Front-end communicates with the back-end
> using
>> POP3.
>>
>> -- 
>> Mark Fugatt
>> Exchange MVP
>> http://www.exchangetrainer.com
>> http://www.msexchange.org
>> "Pavel Nagaev" <p8p@yandex.ru_REMOVE_IT> wrote in message
>> news:OM$3rKgSEHA.3580@TK2MSFTNGP09.phx.gbl...
>> Hi people,
>>
>> In Exchange Server 2003 Deployment guide, page 127 I found the words:
>>
>> To configure a clustered back-end server, you must map each front-end
> server
>> to the nodes of your cluster, so that either node can accept proxy
> requests
>> from any front-end server in your organization. Proxy requests are
> requests
>> for messaging services from client computers running Microsoft Outlook®
> Web
>> Access, Outlook Mobile Access, Microsoft Exchange ActiveSync®, POP3, or
>> IMAP4. These proxy requests are sent to the cluster through the front-end
>> servers. All communication between front-end and back-end servers goes
>> through TCP port 80, regardless of the port used for communication 
>> between
>> the client and front-end server.
>>
>> Is it true that  All communication between front-end and back-end servers
>> goes through TCP port 80?
>>
>> I thought that front-end proxies the requests to corresponding port.
>>
>> POP3(TCP/110)->Front-end->POP3(TCP/110)->Back-end
>> SMTP(TCP/25)->Front-end->SMTP(TCP/25)->Back-end
>> HTTP(TCP/80)->Front-end->HTTP(TCP/80)->Back-end
>>
>> Does it mean that if I connect with POP3 client to front-end server it
>> proxies POP3(TCP 110) packets to back-end server by TCP 80 ? But POP3
> server
>> on back-end server is listening  110 port.
>>
>> I don't understand where I made mistake while reading.
>>
>> -- 
>> Best Regards
>> Pavel Nagaev
>> Messaging administrator
>> Novorossiysk, Russia
>> Mobile phone: (8617) 65 09 01
>> Office phone:  (8617) 64 25 53 ext. 74046
>> Fax: (095) 7975990 ext. 5848
>>
>>
>>
>>
>
>
>