Hello,

Just been helping someone on the forums who appears to have configured their 
network interface incorrectly. It looks like they've assigned 250.250.250.0 as 
the netmask.
I've tried assigning this netmask on a 10.1 machine and ifconfig happily 
accepts it.

Is there any reason why FreeBSD accepts this value as a netmask? I'm fairly 
well versed in IPv4, although not a real expert, but I see no reason why such a 
mask would be used.

Testing on my Win8.1 workstation, it gets rejected telling me the mask must be 
contiguous (i.e. all 1's then 0's), as I would expect.

Regards,
Matt Churchyard

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