firewalls pix and microsoft exchange

help required

I've set up a test network for the practice of sending e-mail messages between

Send servers in windows 2000 domains different

(see attachment for the network layout) is what I'm trying to achieve

to send messages to a user in the field of cyote.com

([email protected] / * /) located behind a firewall pix 501 to a user

the area of acme.com ([email protected] / * /) located behind a pix 515

network firewall has been implemented so that messages from freds for barney

are sent to an email server front-end dmz based acme.com

and are then transmitted by proxy to the backend mail server where is the mailbox of barney

located where resides on the inside interface of the firewall 515.

frontend and backend servers are members of the same active directory

area and therefore, there should be no problem of received messages to the

front-end server relayed to the back-end server.

but the problem I had is that it does not work when I send a message

Fred barney outlook on freds computer (xp-1) tells me that the message

has been sent but it never happens to the barneys mailbox there is no error message

Nowhere on sending messages, so I'm not sure that is the problem

lies with the firewall 501 does not allow messages through or the firewall 515

not allowing messages through.

now I just read that there are problems with microsoft exchange

(in this case the Exchange 2000 with service pack 3 applied) in conjunction

with cisco firewalls, but my study guide is not very next on

How to solve.

so this a cry for I help have been working on it for 2 weeks and have not been

to fix this anyone know what I should do to firewalls

to get this working any help will be greatly appreciated.

PS

Outlook web app through the front-end server to barneys mailbox works

fine (if a little slow)

the pix 501 is running ios 6.3 (4) and the 515 is running ios 7.0 (4)

concerning

Melvyn Brown

A simple test would be to telnet from fred's PC to the IP address of the intermediate zone "telnet x.x.x.x 25' if that allows you through this part is good. Move to the next piece of the puzzle.

As shown previously to enter ' no fixup not protocol smtp 25' to the pix.

Tags: Cisco Security

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