What is the meaning of these 2 lines in my pg_hba.conf? I am guessing the first is to allow local connections, but what about the 2nd?
host all all 127.0.0.1/32 trust
host all all ::1/128 trust1 Answer
Both trust local connections.
127.0.0.1/32 is the typical IPv4 localhost address (although the entire 127.0.0.0/8 is reserved for loopback).
::1/128 is the IPv6 address for loopback; cf section 2.4 of RFC4291.
