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Message Labs Stops OMA & OWA - 11.Apr.2006 9:44:22 AM

stooie29

Posts: 4
Joined: 11.Apr.2006
Status: offline

Hello, We have been running OWA & OMA successfully for over a 8 months. We publish Exchange 2003 through ISA 2004 (SP1) both on Windows 2003. We are looking to implement Message Labs web content filtering and have setup a trial. To implement this it involves installing a proxy agent on to ISA and setting up a upstream proxy in the last default rule of the web chaining to the Message labs servers. This works fine however when we switch over to the service OMA And OWA stops working. I have read articles on direct access and spilt DNS but am not getting very far I was wondering if someone could point me in the right direction. Thanks

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RE: Message Labs Stops OMA & OWA - 12.Apr.2006 4:19:54 PM

tshinder

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Stooie,

Is the Message Labs solution for forward or reverse proxy?

Thanks!
Tom

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Thomas W Shinder, M.D.

(in reply to stooie29)

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RE: Message Labs Stops OMA & OWA - 12.Apr.2006 5:03:15 PM

stooie29

Posts: 4
Joined: 11.Apr.2006
Status: offline

Hello Tom,

Thanks for the reply.

I belive it is a foward proxy. All of are HTTP & HTTPS goes up to them and the filtering is done at their end for content, anti-virus and spyware.

(in reply to tshinder)

Post #: 3

RE: Message Labs Stops OMA & OWA - 13.Apr.2006 3:26:57 PM

tshinder

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Stooie,

OK, in that case none of the OMA/ActiveSync traffic should be going to the Message Labs box, right?

Thanks!
Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to stooie29)

Post #: 4

RE: Message Labs Stops OMA & OWA - 13.Apr.2006 3:59:09 PM

stooie29

Posts: 4
Joined: 11.Apr.2006
Status: offline

Agreed but for some reason as soon as we implement the service oma and owa stops working i am totaly puzzeled as to why????

(in reply to tshinder)

Post #: 5

RE: Message Labs Stops OMA & OWA - 13.Apr.2006 5:39:03 PM

jchiver

Posts: 25
Joined: 7.Oct.2005
Status: offline

the most likely cause will be DNS.

can you check to make sure that the DNS address of you OWA and OMA are set to point straight at your ISA and not Message Labs.

We use message labs here and still have OWA in place.

Jeremy

(in reply to stooie29)

Post #: 6

RE: Message Labs Stops OMA & OWA - 15.Apr.2006 7:33:19 PM

tshinder

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline

Hi Stooie,

What are the names on the Public and To tabs?

Thanks!
Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to jchiver)

Post #: 7

RE: Message Labs Stops OMA & OWA - 18.Apr.2006 9:58:37 AM

stooie29

Posts: 4
Joined: 11.Apr.2006
Status: offline

Is this on the web chaining rule? If so the to tab has all networks. The publishing rules in the fiwewall policy are from the listner to the exchange server on its local ip address.

Thanks

(in reply to tshinder)

Post #: 8