In this context eavesdropping is probably far more likely than MITM. Quite apart from MITM being an active attack only needed (ish) for manipulation of the tra

In this context eavesdropping is probably far more likely than MITM. Quite apart from MITM being an active attack only needed (ish) for manipulation of the transferred data, at the throughputs likely involved here and the fact that leased lines are used, MITM would probably provide far too much hassle for its worth.