I had one of the MSP reps at the office in Boston add an account I created in my.astaro.com to the configuration so we can test out the MSP licensing feature... and it seems there's some issue preventing our SUM from registering. I checked the credentials I was supplying by logging onto the site, they worked fine. It appears, based on the logs, to be some sort of outage or cert issue:
2013:06:07-14:48:18 mspsum01 accd: 1033755 [0xdcbedb70] INFO server.msp.MspCache null - Requesting signed certificate from myAstaro
2013:06:07-14:48:18 mspsum01 accd: 1033755 [0xdcbedb70] INFO server.msp.LpClient null - Connecting to ws-csr.sophos.com:443
2013:06:07-14:48:19 mspsum01 accd: 1034571 [0xd7be3b70] WARN server.msp.LpSession null - LpSession::clear() IO error during recv [license-server]
2013:06:07-14:49:19 mspsum01 accd: 1094571 [0xdcbedb70] ERROR server.msp.MyAstaro null - request exceeded timeout of 60 seconds
2013:06:07-14:49:19 mspsum01 accd: 1094572 [0xdcbedb70] ERROR server.msp.TrustRelationshipAction null - MSP activation failed: myAstaro: request exceeded timeout of 60 seconds
This configuration is behind a Sophos UTM, but I have firewall rules opened up and transparent proxy bypass configured for the SUM IP; I see nothing dropped by the UTM in the IPS or Firewall logs.