[Bug 217637] One TCP connection accepted TWO times

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Thu Mar 16 08:47:41 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217637

--- Comment #13 from Alexandre martins <alexandre.martins at stormshield.eu> ---
I want to remind you that the original client is a smartphone. The first time
that I saw the problem, I made a tcpdump on the wireless box, not on the
smartphone itself.

The server response may have been delayed into the wifi process (poor signal ?)
and takes time to reach the phone (but has already been captured into the
pcap). The phone may have done a re-transmit because it thinks that the http
request was lost.

I just managed that to reproduce it through the scapy script on the ubuntu with
a iptables configuration that drops the TCP reset.

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