failed login attempts to account accounting (smtp)

[hoseke]

Hi,

I'm receiving large number of notifications from on of my servers, indicating: Large number from several IPs and Different Countries.


failed login attempts to account access (smtp)

failed login attempts to account accounting (smtp)

failed login attempts to account apple (smtp)

failed login attempts to account acer (smtp)

failed login attempts to account advertising (smtp)

I'm running cPHulk, but is this is a Hacking attempt to certain email address in the server?

 

[cPanelMichael]

Hello

It sounds like a brute force attack on your email service. You may want to block the IP addresses making those authentication attempts via your firewall.

Thank you.

 

[hoseke]

Hi
Thank you, I did.

This is crazy! For the past 3 hours this is non stoping attack. So far 13 attempts from 10 different countries! And IPs.

I'm thinking to suspend one of the accounts on the server ? Temporarily

Thanks

 

[quizknows]

Sadly this is normal, suspending an account likely will not help.

I highly recommend CSF (configserver firewall), it will automate the blocking for you.