* Pavel Rappo: >> On 4 Sep 2019, at 18:54, Florian Weimer <fwei...@redhat.com> wrote: >> >> You should use a larger timeout than the initial UDP timeout, >> though. > > Could you elaborate on that?
If you use the initial UDP timeout (one second, I think), the kernel will not complete the TCP handshake if the initial SYN segment is lost because the retransmit delay during the handshake is longer than that. Thanks, Florian