[nmglug] POP3 Server::Request for Info

[luis pena]

I work in a Windoze house, contantly looking for a way to integrate Linux. I finally have my chance and would like to pose some questions to the community on the subject of firewalls and POP3.

First let me start w/ an overview of my network. We are 18 nodes connected via T1/partial T1's on a Frame Relay network. We are using Cisco routers and our firewall is a Cisco PIX. We are in the process of switching over to a new domain and upgrading our firewall to include a spam filtration (Barracuda/Sonicwall). Be advised I am aware of the numerous solutions available in the Open Source realm... alas, I do not make the final decision on hardware purchases 

We have and exchange 2003 sever and a 2003 domain controller that provides internal authentication and email services. One of the features of exchange is 
outlook web access (similar to squirrel mail) which allows people outside of our internal network to check the email.

I have been tasked with finding a solution for configuring a POP 3server to sit in the DMZ of the firewall. This server will provide several functions:
- Serve up Outlook Web Access on an Apache Server(which will require communications with the LDAP-based active directory?)
- Be configured have the exchange server initiate the opening of port 25 on the POP 3 server to download email. It is preferred that incoming mail be housed on the POP 3serve after hitting the spam filtration device.

Here are my questions:
- Is the solution of placing a POP3 server in the DMZ my best option for protecting my exchange server and serving up web access to email?
- Are there any items that I have not considered?
- Will I need LDAP running on Linux boxen to ""talk" to active directory
- What would be the best way to set up a testing sandbox (ad hoc, through the PIX, etc...)

Thanks to Ed Brown for pointing me towards dovecot as a solution for my POP3 needs. I hope I have been clear and have provided enough information... I am still learning. Thank you in advance.



 
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