Solved

Accessing Outlook thru SSL VPN (port to be Enabled)

Posted on 2009-07-12
4
602 Views
Last Modified: 2012-05-07
We are in the process of configuring SSL VPN, we have enabled MS outlook to be available for VPN users thru tunneling. our SSL VPN box is in DMZ, and right now traffic is enabled for port any to any from VPN box to our Backend exchange server which is in different zone and vice-versa.

As part of security, we want only to enable those port which is required to get outlook working thru RPC from SSL VPN box to exchange serrver and vice-versa.

Our Exchange Farm:
Front end server in DMZ (Web mail configured)
Backend server in Server Zone
No RPC over HTTPs configured
0
Comment
Question by:TJOSY
  • 2
4 Comments
 
LVL 1

Expert Comment

by:lucidica-jamal
ID: 24833912
Hiya,

If you are using a VPN, then all you need to open is the VPN port, no other ports need to be open to allow exchange information to pass through, as it will all pass through the VPN port.

Hope that helps!

0
 

Author Comment

by:TJOSY
ID: 24833964
thats from external to VPN box. My requirement is from VPN box to Exchange Server
0
 
LVL 1

Assisted Solution

by:lucidica-jamal
lucidica-jamal earned 50 total points
ID: 24833994
Oh ok...
Exchange uses alot of ports!

A list of them are available here: http://www.petri.co.il/ports_used_by_exchange.htm

Hope that helps!
0
 
LVL 65

Accepted Solution

by:
Mestha earned 75 total points
ID: 24835266
What you should do is remove the frontend server from the DMZ. Whatever your reason for putting it there, I can guarantee that it is wrong. It does nothing for your security and actually weakens it.

Put the frontend server inside, configure RPC over HTTPS. It only needs one port then - 443.
You could look at using SSL offloading, which would then only need port 80, but requires very careful configuration. A lot of people have problems with it, so usually end up using conventional RPC over HTTPS with a certificate on the frontend server and just using the SSL VPN as an additional wrapper.

Simon.
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Scam emails are a huge burden for many businesses. Spotting one is not always easy. Follow our tips to identify if an email you receive is a scam.
Are you unable to connect or configure Hotmail email account in Microsoft Outlook 2010, 2007? Or Outlook.com emails are not downloading to Outlook? Lets’ see the problem and resolve Outlook Connector error syncing folder hierarchy (0x8004102A).
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question