How do you use psql client to connect to a postgresql ipv6 host?

# postgresql.conf listen_addresses='::' and # pg_hba.conf hostssl webdb webserver ::0/0 cert The postgresql server is running on docker with pingable ipv6 address of "GlobalIPv6Address": "fe80::242:ac12:2" - so no firewalls obstructing. I am using the following command to connect psql --command="select * from test;" -d webdb -h fe80::242:ac12:2 -p 5432 -U postgres psql: could not connect to server: Invalid argument Is the server running on host "fe80::242:ac12:2" and accepting TCP/IP connections on port 5432? Why is the host not recognized? Is it not possible to use ipv6 with psql? Also, I did not find an ssl parameter option in psql.