Mirc needs a severe mod. Just tested this with a friend on-line and my DirecWay connection. The IP address returned by /DNS done by myself in Mirc yeilds the local IP address in the Sat software. This IP works for receiving only.
Had friend do /DNS on me and got totally different IP address. Switched to that IP address. Could send just fine, but now receive is broke. Packet size has nothing to do with it. Changed IP address back to original and received worked...send broke again.
Mirc needs a change to allow for seperate IP when sending.