Quote:
Originally Posted by eschwartz
Quote:
Originally Posted by kovidgoyal
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Is this like a "calibre won't work" thing, or a best-practices-when-referencing-localhost thing?  Because zeroes are easier to type really really fast.
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Mostly that 127.0.0.1/32 is defined as part of the loopback address block (127.0.0.0/8) -- see RC5735. I've rarely seen any other members of that block used.
0.0.0.0 is defined as part of the 0.0.0.0/8 "current network" block in the same RFC. In practice using either the all zeroes or all ones addresses for an address block is not a good idea since some software treats the all zeroes address in the same way as the all ones address, acting as if it was the broadcast address.