[Pkg-exim4-users] Probe, every 27 mins, from one IP addr - how to block?

[Iain Mac Donald]

On Wed, 02 Mar 2016 15:28:29 +0000
Ron Leach <ronleach at tesco.net> wrote:

> Is there any way I can prevent this IP address reaching exim?

IPTables?
Something like this:
https://www.rosehosting.com/blog/blocking-abusive-ip-addresses-using-iptables-firewall-in-debianubuntu/

You could also use /etc/hosts.deny but it is a little less flexible:
https://jamalahmed.wordpress.com/2010/03/19/using-etchosts-allow-and-etchosts-deny-to-secure-unix/

Regards,
Iain.