> The Sun's at least seem to ignore checksums if 0 even if turned on...

The UDP spec (RFC 768, near the middle of page 2) says that an incoming
UDP checksum of zero means that the transmitter did not generate a
checksum (implying that the receiver should ignore it). 

I would be extremely surprised if turning on UDP checksums in a NetBSD
system causes ill effects elsewhere. 

--apb (Alan Barrett)

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