On Sat, 2022-12-17 at 14:32 +0100, Roberto Ragusa wrote:
> On 12/17/22 12:17, Patrick O'Callaghan wrote:
> > On Sat, 2022-12-17 at 12:10 +0100, GianPiero Puccioni wrote:
> 
> > > I thought that the last octet could not be 0 (address of the
> > > network)
> > > or 255 (broadcast). Is this not the same for the Loopback?
> > 
> > 127.0.0.0/8 refers to the network, not to a specific address. The
> > final
> > 0 octet would be the broadcast address if used in an IP packet.
> 
> Well actually it is the 0.0.0 ending part that refers to the network,
> since this is a /8 network.
> So 127.3.4.0 is a perfectly valid address even if it ends with a 0.
> 
> The "0 at last octet" rules only applies to /24 networks.

I regularly get that the wrong way round :-)

poc
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