Hello, I know this isn't precisely on topic but I'm having an issue that I could use some assistance with. I'm currently seeing a very interesting issue for a single server. File transfers from Server A to Server B are relatively slow and not using up much of the circuit. Upon further inspection the TCP window size remains at default 65535 and window scaling doesn't negotiate. What's interesting is this is only affecting a single server and only when traffic is going over the WAN circuit. Testing from Server A to any server on it's network shows it is negotiating window scaling just fine. Below I'll try and draw out a better idea of what is happening. Let the letters represent the server in question and let the .# represent which subnet they are on to show whether transversal of the WAN circuit is occurring. Server A.1 -> Server B.2 = No window scaling Server A.1 -> Server C.1 = Window scaling Server B.2 -> Server A.1 = Window scaling Server C.1 -> Server B.2 = Window scaling The net result here is when window scaling is properly being used I'm seeing about 30-40 Mbps of bandwidth usage, without scaling I'm only seeing 2.8Mbps. Any thoughts?