I'm troubleshooting a connection between a client PC and an HTTP server. In this example, the client is requesting a file and only receives a few KB before the connection is reset.
The server sends four packets, then the client ACKs the first packet only, which appears to trigger the server to retransmit the un-ACKed packets. After several retransmissions the connection times out.
There is an IPsec tunnel between the client and the server. Any thoughts on this behaviour?