pgbouncer server (440a:90a0:302:4525:lda0:1:2:3)


app_db = host=pg_server port=5432 dbname=app_db

listen_port = 6432
listen_addr =
auth_type = md5
auth_file = userlist.txt
logfile = pgbouncer.log
pidfile = pgbouncer.pid
admin_users = someuser

Test connection:

-bash-4.2$ psql -p 6432 -h pg_server -U postgres app_db
psql: could not connect to server: Connection refused
    Is the server running on host "pg_server" (340b:c210:402:4545:3a1a:1:2:3) and accepting
    TCP/IP connections on port 6432?

Network ports:

sudo lsof -i -P -n | grep LISTEN | grep 6432
pgbouncer 160039 postgres    7u  IPv4 39990293      0t0  TCP (LISTEN)

postgresql server (340b:c210:402:4545:3a1a:1:2:3)

Telnet pgbouncer server with 6432 port:

$ telnet -6 440a:90a0:302:4525:lda0:1:2:3 6432
Trying 440a:90a0:302:4525:lda0:1:2:3...
telnet: connect to address 440a:90a0:302:4525:lda0:1:2:3: Connection refused

Try to connect to pgbouncer server 5432 port(postgresql server installed on pgbouncer server):

telnet -6 440a:90a0:302:4525:lda0:1:2:3 5432
Trying 440a:90a0:302:4525:lda0:1:2:3...
Connected to 440a:90a0:302:4525:lda0:1:2:3.
Escape character is '^]'.

Why can't accept 6432 port on postgresql server(340b:c210:402:4545:3a1a:1:2:3)?

1 Answer 1


Your PgBouncer is not listening on IPv6 address because this line tells it so:

listen_addr =

You should change it to something which includes IPv6 addresses, like

listen_addr =, ::1

or maybe (to listen on all interfaces):

listen_addr = *

Side note: you should probably not publish your real addresses, even if "440a:90a0:302:4525:lda0:1:2:3" is not a valid ipv6 address :-)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.