Tunneled communication monitoring

A system for monitoring packet loss in tunneled communications, the system comprising:

• one or more hardware processors;
• a packet crafting agent executable by the one or more hardware processors and configured to generate a probe packet;
• a communication interface executable by the one or more hardware processors and configured to transmit the probe packet through a network tunnel to a destination computing system and to receive, from the destination computing system through the network tunnel, an acknowledgment packet indicating detection and receipt of the probe packet by the destination computing system;
• and
• a packet loss monitor executable by the one or more hardware processors and configured to determine whether the probe packet and the acknowledgment packet satisfy a packet loss condition based on the probe packet and the acknowledgment packet satisfying the packet loss condition.

One or more tangible processor-readable storage media devices embodied with instructions for executing on one or more processors and circuits of a computing device a process for monitoring packet loss in tunneled communications, the process comprising:

• transmitting a probe packet from the computing device through a network tunnel to a destination computing system, wherein the probe packet includes a probe flag recognizable by the destination computing system;
• receiving, from the destination computing system through the network tunnel, an acknowledgment packet indicating receipt of the probe packet with the probe flag by the destination computing system, wherein the destination computing system recognized the probe flag, intercepted the probe packet without forwarding the probe packet within the destination computing system, and returned the acknowledgement packet to the computing device;
• and
• determining whether the probe packet and the acknowledgment packet satisfy a packet loss condition based on the probe packet and the acknowledgment packet satisfying the packet loss condition.