Skip to Content
PostgreSQL 10 Administration Cookbook - Fourth Edition
book

PostgreSQL 10 Administration Cookbook - Fourth Edition

by Simon Riggs, Gianni Ciolli
May 2018
Intermediate to advanced content levelIntermediate to advanced
576 pages
30h 25m
English
Packt Publishing
Content preview from PostgreSQL 10 Administration Cookbook - Fourth Edition

Avoiding duplicate SSL connection attempts

In the Setting up a client to use SSL section of the previous recipe, Connecting using SSL, we saw how the client's SSL behavior is affected by environment variables. Depending on how the SSLMODE environment variable is set on the client (either via compile-time settings, the PGSSLMODE environment variable, or the sslmode connection parameter), the client may attempt to connect without SSL first, and then attempt an SSL connection only after the server rejects the non-SSL connection.

This duplicates a connection attempt every time a client accesses an SSL-only server.

To make sure that the client tries to establish an SSL connection on the first attempt, SSLMODE must be set to prefer or higher.

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

PostgreSQL 13 Cookbook

PostgreSQL 13 Cookbook

Vallarapu Naga Avinash Kumar
PostgreSQL 9 Administration Cookbook - Second Edition

PostgreSQL 9 Administration Cookbook - Second Edition

Simon Riggs, GIANNI CIOLLI, Hannu Krosing, Gabriele Bartolini

Publisher Resources

ISBN: 9781788474924Supplemental Content