I have a requirement to make an iSCSI connection from the internal network to a server in the perimeter network through a TMG2010 SP2 box.
The iSCSI target is in the perimeter network with the initiator being in the internal network. (Yes the iSCSI target is in the perimeter network, not the internal. This is not a production setup, and I just need to bring more storage in). If I take the initiator and connect it the the perimeter network iSCSI connection works without problems, all drives are available, so the iSCSI setup works. But when I connect the initiator back to the internal network I can't get TMG configured to allow the connection through.