asked on

Exchange sever and ISA

Hi ,
im in the planning process to rollout ISA and here is one thing im unsure about

We have an an external mx record say mail.abc.com IP 7.7.7.7 , this points to our current firewall which then sends the requests to the internal Exchange box

I want to be able to continue to send / receive mail as normal using ISA . the ISA Box will have a different ip and DNS name.

How do i setup ISA to contine as normal when I bring down the old Firewall........

Thanks

ASKER CERTIFIED SOLUTION

llyquid

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

stephengriffin

ASKER

Hi , thanks for your response , I will accept your answer but can you first answer one or two things.

1) How do I check the mx order on say mail.abc.com ?

2) Do i just put another record for mail.abc.com ( new isa box) with my ISP ? Then delete the old MX record later?

thanks !

llyquid

1) from a NT/2000 command prompt: nslookup , server 198.6.1.5 , set type=mx , abc.com

The commands are seperated by , and the results should look like those I pasted for yahoo.com. You will probably have only one MX entry. Write down its preference.

2) Yes, add a second MX record, and its associated A record (to tie the mail2.abc.com to an IP address), and delete the old record once your migration is complete. Or better yet, change the preference of your old record to a lower number, and leave an SMTP server set up in the event your mail server crashes, It can be configured to receive email until the main system is restored. It wont distribute, but if configured properly, it will forward the cached mail to your Exchange server once it is back up and running.

stephengriffin

ASKER

Is the Ip address after "server" ie 198.6.1.5 in your example , the ip address of the abc.com or mail.abc.com ?

thanks

llyquid

198.6.1.5 is a publicly accessible DNS server, I think at UUNET. you can just use this value verbatim, or you can substitute an alternate Public DNS for this IP.

ResIpsa2

Les Moore

No comment has been added lately, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area for this question:

I recommend: points to llyquid

if there is any objection or other expert commentary to this recommendation then please post in here within 7 days.
If you feel that your question was not properly addressed, or that none of the comments received were appropriate answers, please post a request in Community support (with a link to this page) to refund your points. https://www.experts-exchange.com/Community_Support/

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

thanks,
lrmoore
EE Cleanup Volunteer
---------------------

modulo

Finalized as proposed

modulo

Community Support Moderator
Experts Exchange