Points of Interest
Zephyr uses UDP datagrams sent between ports 2102, 2103, and 2104. It is incompatible with most routers doing NAT because it reports the internal IP address and so returning datagrams are incorrectly routed. Most sites have deployed Zephyr using Kerberos 4 authentication exclusively, though in late 2007, some sites, including Iowa State, deployed Zephyr using Kerberos 5.
Read more about this topic: Zephyr (protocol)
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