Is it possible in theory to have a computer with a single interface having
an alias on another network? Everytime I have tried this in the past I have
used 2 interfaces, but I just tried 3 computers:

A: 192.168.0.62
B: 192.168.1.2
C: 192.168.0.1, alias 192.168.1.1

all netmasks are 0xffffff00.

A can ping C
B can ping C
C can't even ping 127.0.0.1

Can this work with said netmask, or have I messed up the routes?

Cheers,

Patrick