PostgreSQL 15 : PostgreSQL over SSL/TLS2023/07/05 |
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SSL/TLS connection to PostgreSQL.
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| [1] | SSL/TLS is enabled by default, so it does not need to change settings if you don't have specific requirements to the system. So SSL/TLS connection is enabled automatically if you connect to PostgreSQL via TCP. |
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# settings for SSL/TLS # certificate is from the OS bundle root@www:~# grep -n ^ssl /etc/postgresql/15/main/postgresql.conf 105:ssl = on 107:ssl_cert_file = '/etc/ssl/certs/ssl-cert-snakeoil.pem' 110:ssl_key_file = '/etc/ssl/private/ssl-cert-snakeoil.key' # settings for connection method root@www:~# grep -v -E '^#|^$' /etc/postgresql/15/main/pg_hba.conf local all postgres peer local all all peer host all all 127.0.0.1/32 scram-sha-256 host all all ::1/128 scram-sha-256 local replication all peer host replication all 127.0.0.1/32 scram-sha-256 host replication all ::1/128 scram-sha-256 # to connect via socket that is the default, connection is not encrypted debian@www:~$ psql testdb
psql (15.3 (Debian 15.3-0+deb12u1))
Type "help" for help.
testdb=> \q
# to connect via TCP, connection is encrypted debian@www:~$ psql -h 127.0.0.1 -d testdb -U debian
Password for user debian:
psql (15.3 (Debian 15.3-0+deb12u1))
SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, compression: off)
Type "help" for help.
testdb=> select name as "Parameter name", setting as value, short_desc from pg_settings where name like '%ssl%';
Parameter name | value | short_desc
----------------------------------------+----------------------------------------+-------------------------------------------------------------------------
ssl | on | Enables SSL connections.
ssl_ca_file | | Location of the SSL certificate authority file.
ssl_cert_file | /etc/ssl/certs/ssl-cert-snakeoil.pem | Location of the SSL server certificate file.
ssl_crl_dir | | Location of the SSL certificate revocation list directory.
ssl_crl_file | | Location of the SSL certificate revocation list file.
ssl_key_file | /etc/ssl/private/ssl-cert-snakeoil.key | Location of the SSL server private key file.
ssl_library | OpenSSL | Shows the name of the SSL library.
ssl_passphrase_command_supports_reload | off | Controls whether ssl_passphrase_command is called during server reload.
ssl_prefer_server_ciphers | on | Give priority to server ciphersuite order.
(9 rows)
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