John Hasler wrote: > Ntp should listen on the LAN by default but there is no reason for > it to listen on the _WAN_ by default.
But the difference between those two things depends upon how the network is configured outside of the local host machine. In other words, how is the local host machine to know that an ethernet device is a LAN device or a WAN device? The eth0 interface may be attached on a private LAN with an RFC1918 address such as 192.168.10.10. Or it might have eth0 configured on the global and hostile internet with 192.0.43.10. Or it might have a non-RFC1928 address but only be connected to a LAN. How should the ntp scripted configuration know this? Should it try to match against RFC1918 address space and make assumptions at that point? Because as far as I can see that would be the only way to have any clue at all that an ethernet device is either a LAN or WAN. That would mostly work except for when a public IP address is used on a private LAN space of which there are a lot of networks set up that way. Bob
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