Receive TCP RST packet from unreachable computer

250 Views Asked by Cuza At 28 July 2017 at 07:53

I had an opportunity to work with wireshark.

I installed wireshark on my VMware and made some tests on it, I found an interesting thing.

I sent the HTTP request to non-existing computer and captured all the packet flow with wireshark.

The first packet was SYN packet, the second one was re-transmission packet.(the system hadn't received any response from the targeted computer).

But surprisingly, RST packet from the target computer reached.

I couldn't understand where this packet came from, so I tested for 2 target computers, and in both cases, I had the RST packet.

So are there anyone who can tell me about those suspicious RST packets?

Thanks for reading.

Regards.

There are 0 best solutions below