Avatar of Chris Fletcher
Chris Fletcher
 asked on

Exchange 2013 Setup Need some clarification

Ok so before I ask my questions, I'm going to briefly list how I've got things setup.

I've got 3 servers, all running MS Windows Server 2012 R2 Standard

2 of those servers, lets call them MAIL01 and MAIL02 have Exchange 2013 installed. Both the Mailbox and Client Access roles.

The other server is just the File Share Witness

I've created a DAG and have made MAIL01 and MAIL02 members of the DAG

I have a mailbox database on MAIL01 that I added a copy for on MAIL02

Lets assume I've got the following IP addresses on these

MAIL01 - 1.1.1.1
MAIL02 - 1.1.1.2
DAG - 1.1.1.3

I also have a Barracuda spam device setup lets assume IP 1.1.1.4

I am fully aware of how DAG and maintaining QUORUM works.

I am aware that DAG does not provide high availability to the CAS servers.

What I've done is on my domain controller in DNS, I've added 2 A host entries for mail.company.com pointing to 1.1.1.1 and 1.1.1.2. I implemented this because I don't have a hardware load balancer.

I have static NAT setup on my router for the following ports: 80, 110, 143, 443, 587, 993, 995. These all go to IP 1.1.1.3
I have 2 more ports, 25 and 465 which go to 1.1.1.4 which is the Barracuda. In the Barracuda config, I have it routing all e-mails to 1.1.1.3 which is the DAG.

I have a few questions based on this setup.

1. Is this properly setup for high availability?
2. I'm assuming that in order to provide the same kind of round robin DNS for the CAS server from the outside as I have from the inside, I'd need to have a public IP for each of the CAS servers and add both of those to my external DNS servers. If I do this, which ports would I need to setup static NAT for on my router?
3. Yesterday we had a short power outage which caused MAIL02 to go down. Once this happened, the database on MAIL01 was in a dismounted state and I was unable to mount it again. Things wouldn't start working again until MAIL02 was back online.

Basically what I'm trying to achieve is the following:

Have a single domain mail.company.com
Have multiple exchange servers for high availability so that if one were to go down, the other would still be available.
Continue to be able to use my Barracuda and have it route mails to a single IP address.

Any help with this would be much appreciated.
ExchangeWindows Server 2012

Avatar of undefined
Last Comment
Delphineous Silverwing

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Adam Brown

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
Chris Fletcher

ASKER
Understood. Is there any particular load balancer you could recommend. The boss is pretty particular about wanting to have HA without having to make manual changes.

The other part that I'm confused about is how to go about setting up the Barracuda appliance.

The router is forwarding ports 25 and 465 to the Barracuda.

The Barracuda can only route mail to a single IP address.

I am currently routing it to the DAG IP address, this seems to work. Is this the proper way to do it or should I be using a load balancer?


The File Share Witness was still accessible during the outage.
SOLUTION
Adam Brown

Log in or sign up to see answer
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform
Sign up - Free for 7 days
or
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
Not exactly the question you had in mind?
Sign up for an EE membership and get your own personalized solution. With an EE membership, you can ask unlimited troubleshooting, research, or opinion questions.
ask a question
Delphineous Silverwing

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Split:
-- Adam Brown (https:#a42073626)
-- Adam Brown (https:#a42073733)


If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

Delphineous
Experts-Exchange Cleanup Volunteer
Your help has saved me hundreds of hours of internet surfing.
fblack61