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Moving exchange interfaces for Barracuda spam filter

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Last Modified: 2012-05-07
I need to move our exchange interface to put a Barracuda spam filter inline. Our current setup is: 2 vms (win2k3 stnd sp2, server1.0, on a dell 1750 with 2 nic bridged to 4 vitual nics),  a front end exchange vm with an interface on the outside with a public ip x.x.94.10 with gtwy x.x.94.1, and a private ip x.x.7.30 without a gtwy, a back end exchange with a private ip x.x.7.13.

The suggestion I was given was to NAT our public ip x.x.94.10 to a private ip x.x.8.10 in our firewall. Patch outside switch to the spam filter and address it x.x.8.10. Create a dns record for the spam filter barracuda.barracudanetworks.com x.x.8.10. Change our mx record from mail.xxxx.org to barracuda.barracudanetworks.com. And flush and re-register dns.

Does this sound like a good way to go? How will this affect OWA, which we had accessed through mail.xxxx.org? Thanks.
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Rick FeeMessaging Engineer - Disaster Recovery Engineer
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Rick FeeMessaging Engineer - Disaster Recovery Engineer
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Commented:
Well that is something I didn't know about the Barracuda.      I like it but the problem if the Barracuda freezes it takes down both email and OWA.   Not that this happens alot...they are solid device.    Just depends on the org requirements/size.    I'm not sure what load this will put on the Barracuda if you have 1000 remote users etc.

Just more to think about when setting up

Commented:
Good point.

Always good to have a spare on site :P

Commented:
These days it is so flipping easy to change an MX record.  I remember back in the day when it took like 2 weeks to change one.
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