Okay, made it past the first issue. Same network, but their might be some network segregation going on. Adding the proxy to the computer made it so the client will now find/connect successfully. However, the connection closes after ~30 seconds with a PushConnException:

{"The underlying connection was closed: The connection was closed unexpectedly."} Lightstreamer.DotNet.Client.PushConnException


On the server, they saw the SSL handshake succeed but and then the connection closed shortly after that.

debug logs:

23-Jan-14 16:08:25,364|DEBUG|LightstreamerLogger.connections | Lightstreamer HTTPS Server|Socket accept on 10.x.x.20:58596
23-Jan-14 16:08:25,424|DEBUG|ghtstreamerLogger.connections.s sl|IO SSL HANDSHAKE SELECTOR 1|Handshake completed on socket Lightstreamer HTTPS Server; selected cipher suite TLS_RSA_WITH_AES_128_CBC_SHA
23-Jan-14 16:08:25,424|INFO |LightstreamerLogger.connections |SERVER POOLED THREAD 5 |Accepted HTTPS connection on Lightstreamer HTTPS Server from 10.x.x.20:58596
23-Jan-14 16:08:30,236|DEBUG|LightstreamerLogger.connections | Lightstreamer HTTPS Server|Socket accept on 10.x.x.20:60089
23-Jan-14 16:08:30,380|DEBUG|ghtstreamerLogger.connections.s sl|IO SSL HANDSHAKE SELECTOR 1|Handshake completed on socket Lightstreamer HTTPS Server; selected cipher suite TLS_RSA_WITH_AES_128_CBC_SHA
23-Jan-14 16:08:30,380|INFO |LightstreamerLogger.connections |SERVER POOLED THREAD 6 |Accepted HTTPS connection on Lightstreamer HTTPS Server from 10.x.x.20:60089
23-Jan-14 16:08:46,305|INFO |LightstreamerLogger.connections |SERVER POOLED THREAD 1 |Closed HTTPS connection on Lightstreamer HTTPS Server from 10.x.x.20:58596
23-Jan-14 16:08:56,376|INFO |LightstreamerLogger.connections |SERVER POOLED THREAD 8 |Closed HTTPS connection on Lightstreamer HTTPS Server from 10.x.x.20:60089

(slight ip address obfuscation, even tho it is private)

Also, when i look for all exceptions there is a socketException that is being thrown: System.net.Sockets.SocketError.AccessDenied
message: An attempt was made to access a socket in a way forbidden by its accessor permissions

Any suggestions on next steps?