Xenu timeouts possibly due to firewalls with DoS protection
- I have installed a new external modem+router+NAT+firewall+switch box.
Then I had problems accessing newspaper articles.
I looked in the protocols of the box. It claimed that my computer had
started a SYN flood. Of course, this wasn't true, but I had opened a lot
of articles in background browser windows at almost the same time.
After I "relaxed" the parameters in the settings, it worked.
This makes me think that maybe the people who have had timeout problems
with Xenu are also "victims" of such a protection setting in their
firewall box, or in the infrastructure of their ISP.
SYN is the first packet that is sent to a host when starting a
connection. Theoretically, Xenu might send 100 SYN packets that are not
immediately answered, so a monitoring software (that counts "unanswered"
SYN packets) might think something "evil" is going on.