Ethereal-users: Re: [Ethereal-users] DCOM exception

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From: Ulf Lamping <ulf.lamping@xxxxxx>
Date: Tue, 11 Apr 2006 01:58:03 +0200
RODRIGO MARTINEZ wrote:
Hi , I have a doubt about the packet IREMUNKNOW2 interface. 
I have DCOM comunication, but I dont know if this packet must be part of this comunication.
I need comunicate 2 servers but when a pix up his filters, the comunication doesn't work. 
Some white papers said that I need just open the 6100 to 6200  ports, but the web aplication hang.
I ask about this packet IREMUNKNOW2 because this one dont include in this range port. Thanks in advance to any idea. 
Your mail is pretty hard to understand.
DCOM uses DCE/RPC. DCE/RPC uses the endpoint mapper on port 135. The endpoint mapper mechanism will negotiate the "real" data transfer port (which could be any possible port AFAIK). 

I don't know about a white paper telling about ports 6100 to 6200 only.
Basically if you want to use a port based filter with DCOM you're simply out of luck. 

Regards, ULFL