Dear COM gurus,

Here is my situation ... I have a VC++ server and a VB client that must communicate over
the internet.

My client and server can talk successfully on the same computer. I've tested it on my local
computer and on the remote system that will eventually host the server. They also talk
successfully on my local network with the client and server apps on different machines.

However, when I try to communicate with the server on a remote system, I get the following
error (from the VB client):
Run-time error '462':
The remote server machine does not exist or is unavailable.

I believe the error must be somewhere in the DCOM configuration or a firewall problem. Is
there a recipe/checklist for configuring DCOM over the internet ? What firewall ports need
to be open ?

In dcomcnfg, I've tried setting the Connection-oriented TCP/IP endpoints to use port 80
on both client and server machines, but that didn't work. I chose port 80 because I know
that traffic can flow through the firewall on that port.

Other dcomcnfg settings are as follows:
Client:
auth level = default
location: run on this computer, run where data is located
security access: allow everyone, interactive, (my user id), network, system
security launch: allow everyone, interactive, (my user id), network, system, users
security config: administrators = full, creator owner = full, everyone = special,
power users = special, system = full, users = read
identity: interactive user
endpoints: use static endpoint = 80 w/ connection-oriented TCP/IP
Server:
auth level = default
location: run on this computer
security access: allow everyone, interactive, (my user id), network, system, administrators
security launch: allow everyone, interactive, (my user id), network, system, administrators

security config: administrators = full, creator owner = full, everyone = read,
interactive = special, system = full
identity: (my user id)
endpoints: use static endpoint = 80 w/ connection-oriented TCP/IP

I hope someone out there can tell me what I'm doing wrong.

Thanks,
Keith Gemeinhart


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Keith Gemeinhart ([email protected])
Technology Service Corp.
Bloomington, IN
Voice: (865) 692 - 1284
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