Botond Balázs's questions

I have Postgres running on my windows machine and I need to connect to it from inside WSL2.

• The postgres windows service is running
• I can connect to it from the windows command line using psql
• The IP of the WSL2 vm is 172.31.210.120, netmask 255.255.240.0 (determined using ipfconfig).
• The IP of the windows host from inside the vm is 172.31.208.1 (determined using cat /etc/resolv.conf)
• I can connect to a simple web server running on the host from the vm with curl http://172.31.208.1:8080. If I log the IP of the incoming requests, I get 172.31.210.120 so this verifies that both IPs are correct.
• I added the following line to pg_hba.conf: host all all 172.31.210.120/20 scram-sha-256
• I restarted the postgres windows service

If I try to connect to it from WSL using the following command:

$ psql --host=172.31.208.1 --port=5432 --user=postgres

I get this error:

psql: error: could not connect to server: could not connect to server: Connection timed out
        Is the server running on host "172.31.208.1" and accepting
        TCP/IP connections on port 5432?

NOTE: I also tried to test the connection using telnet but it failed too.

The logs under c:\Program Files\PostgreSQL\13\data\log\ show no errors or any signs that there was a connection attempt.

What am I missing here?