Clutching at straws...I have seen where an incorrectly configured route did prevent a proper return of acknowledgement but perhaps that was FTP...

In any case, I can ping every device on the network and get a response on the iMac EXCEPT the address of the i. Actually, all THREE addresses on the i come back as either "No route to host" or "Host is down". Very strange.

I cannot ping the iMac from the i using the IP address. I can ping it using the FQDN but it returns the *external* IP address of the windows server. I can ping the iMac from every other device on the network (that has a command interface).

I need to do some more research, this is still not making much sense....

Pete Helgren
Value Added Software, Inc
GIAC Secure Software Programmer-Java

On 4/20/2012 5:26 PM, Walt Madden wrote:
I believe the routing information of the*origin* device is used - not
the destination. i.e. if you can't get*from* the Mac*to* the IBM i -
the Mac's routing information seems suspect, not the IBM i's.

The IBM i's routing information would come into play when you're trying
to get*from* the IBM i*to* the Mac. "ping"ing the Mac's I/P address
from the IBM i might be a useful datapoint... Be aware in the Mac
Firewall settings there is a "stealth mode" that, if enabled, will
prevent the Mac from responding to a ping - so you'd want that off when
you try to ping the Mac.

From the Mac, can you ping the*router* in between the Mac and the IBM i?

You're sure there isn't a firewall in front of the IBM i that
blocks/allows incoming traffic based on source I/P addresses?

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