On 1/2/25 12:16 PM, John via groups.io
wrote:
On Jan 2, 2025, at 12:11?PM, Brian L. Matthews via groups.io
<blmatthews@...> wrote:
On 1/2/25 3:41 AM, Otto Nikolaus via??wrote:
That¡¯s
[10.0.0.1] a 24-bit block with up to 16 million addresses.
Was that set by default?
10.0.0.0/8
is one of the RFC 1918 non-routable blocks, and an address
in that range (usually 10.0.0.1) is often used by default
for the LAN side of things like gateway modems and
routers. On the internet side, it will have a routable IP
address, but, except for very special circumstances, you
don't want the admin interface accessible via that
address.
Brian
I've seen the 10.0.0.1 address often, but less than the more
common default 192.169.0.xxx or 1.xxx shipped with consumer
equipment. Is there any particular reason a manufacturer would
choose the former over the latter?
Not any big reason that I know of. As you say, it is the biggest of
the three non-routable blocks (2^24 or ~16m addresses,
172.16.0.0/12
has 2^20 or ~1m addresses, and 192.168.0.0/16 has
2^16 or ~64k addresses (actually some of the addresses in each
block are broadcast addresses, so not quite that many, but close
enough)), and it's the easiest to remember (any IPv4 IP address
starting with 10. isn't routable), but I don't think any reason
other than those.
Note that it's 192.168.*, not 192.169.*, which is a regular
routable address block, and 1.* is also a regular routable block
(for example one of Cloudflare's DNS servers is at 1.1.1.1).
Brian
