Question about the 1.12.1 connection process

[bigtimt]

Lately I have been working on my own c# wow 1.12.1 emulator just to learn a thing or two about mmo servers. I have replicated the logon process just fine by following the mangos zero source. However whenever I hand the client off to my realm server, if i send the client some data, aside from the packet to start realm authentication, the client sits their and does nothing. Does the client expect encrypted packets back after it responds to the realm authentication request?