surrogatekey on "[Plugin: Wordfence Security] Tons of login attempts with invalid usernames"

Hi,

I have Wordfence set to immediately lockout invalid usernames, which is working fine -- but I'm getting a continuous stream of login attempts with different invalid usernames, and coming from a bunch of different IP addresses that don't seem to have any particular pattern.

Any suggestions on how I can avoid these?

Thanks -

https://wordpress.org/plugins/wordfence/