WordPress – Stop trackback spam

In Settings/Discussion, uncheck the box “Allow link notifications from other blogs (pingbacks and trackbacks)”

This will stop trackback for all future trackback spam.

To modify your older posts, you need to change the ping_status to “closed” on each row of your wp_posts table in your word press MySql database.

Here is how:

Log on to your cPanel and bring up phpMyAdmin.
Select your wordpress database.
Select your wp_posts table.

Execute the following SQL statement:

UPDATE wp_posts SET ping_status="closed";