DCOM Event 10009 on Server2003

My one and only DC which runs Server 2003 is giving me a DCOM error 10009 stating: DCOM was unable to communicate with computer XXX.XXX.1.1 using any of the configured protocols.  The computer it is trying to reach is private interface of my firewall.  Nothing has changed that I am aware of and if it has, wouldn't it be on the firewall or not?
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smantzDirector of TechnologyAsked:
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edwarnekeConnect With a Mentor Commented:
I ran into an issue where I was getting a similar error. My symptoms and reason for looking at this was that I wasn't receiving mail from specific domains(1and1 hosting, the mail server was mx00.perfora.net), yet most were coming through fine.

What I found was that my internal DNS(Windows server 2003 DNS) was not configured correctly. I didn't have an A record for our MX (mail.organisation.com). Once I entered an A record this error went away and I could receive emails from the problem domain.

Are there any other symptoms you're noticing besides this error?
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smantzDirector of TechnologyAuthor Commented:
No and this only pops up occasionally.  I did see that my DNS forwarding is set to the gateway.  This is for some DNS proxy so, maybe that has something to do with that.  Thoughts?
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