Working with 127.0.0.0/8 on the same host?

Question

Computer networks

Hi all. Can anyone come across? There are multiple modules on the same host. Communication between them is supposed to be via HTTP. If each module has its own address from the network 127,0,0,0/8 will it work?
For example, 1 module is 127.0.0.2 and the second module is 127.0.0.3, will they see each other?

Answer 1

Everything will work, but not sure exactly the way you want.
For example, you can raise several TCP servers on the same port number, but with different addresses from 127/8:
for example, here are several instancesnetcat -l -p 1234 -s 127.0.0.n

>ss -ltpn
State      Recv-Q      Send-Q            Local Address:Port            Peer Address:Port                                           
LISTEN     0           1                     127.0.0.5:1234                 0.0.0.0:*         users:(("netcat",pid=1221,fd=3))     
LISTEN     0           1                     127.0.0.4:1234                 0.0.0.0:*         users:(("netcat",pid=1158,fd=3))     
LISTEN     0           1                     127.0.0.3:1234                 0.0.0.0:*         users:(("netcat",pid=1096,fd=3))     
LISTEN     0           1                     127.0.0.2:1234                 0.0.0.0:*         users:(("netcat",pid=1006,fd=3))

You can connect to anyone by specifying the desired address

Answer 2

on the same host, two programs will not be able to bind to the same port number, and do not care about the address :)
at least there will be a separation by ports.

Answer 3

What are modules in your understanding?
Why do we need different addresses on the same host? Not enough different ports for you?
But in principle, yes, it will work. All addresses from this subnet belong to the local host. At least in Windows it is. You can successfully ping any address on this subnet at any time (except broadcast). I can’t vouch for other OSes, I didn’t check it, but, in theory, the same should be the same.

Answer 4

Carry better on ports. This is usually done