2012 iMac 27 Ethernet connection drops

Background: So I have a new 2012 27" iMac running 10.8.4

I have atlantis chat client running constantly to a private server me and some friends use (http://www.riverdark.net/atlantis/). It's a MUSH/MUD Client for you old school types.

I connect to my router and comcast thru ethernet.

Problem: Often, multiple times during a day, the connection to the chat server just drops.

%% Network connection lost.
%% Disconnected.

Click to expand...

Diagnostic Facts:

• Other "constant" connections on the iMac...downloads, torrents, mmorpg...do not drop connections.
• Running the same version of Atlantis on my G5 at the same time as the iMac, attached to the same router, it does not lose connections.
• Running the same version of Atlantis on other intel machines (in previous times) have not had this problem.
• a test on my MBP with Mountain Lion to eliminates it being a mountain lion issue.

So, what I've come to so far is that this is not a problem with the Router or Cable Company. Nor is it a problem with the client or server.

It would appear that there's some kind of "flux" coming over the iMac's network connection that is minor enough most programs ignore.

Does anyone have any solutions, or advise on further tests/diagnosis?

milkmandan said:

Checking my Network settings I see that the Mac loses IP for a split second causing anything I am connected to drop.

Click to expand...

How are you doing that? Just watching the control pannel? or is that a log you can follow? I dug thru console but didn't come up with anything...

milkmandan said:

Go to System Preferences->Network
you should see your ethernet connection there.

Click to expand...

So you're just catching the change in the preference when the connection problem occours? Mine is much too random for that, unfortunately.