I am having trouble with ZAV 9 trying to contact the library server. I'm
not sure whether the issue is with our NetBox Blue internet filtering
system, or the upstream WAN firewall. A Wireshark trace shows:

SOAPAction: "http://spoon.net/GetRecipes"
Host: www.spoon.net
Content-Length: 401
Expect: 100-continue
Connection: Close

HTTP/1.1 417 Expectation Failed

Does anyone know if ZAV needs to use a particular port when contacting
spoon.net? I can ask to get this opened in the firewall if I know what
it is. Otherwise, any advice would be appreciated.

Thanks in advance