Block Distributed SMTP Auth Attacks, But Allow Google to Send SMTP via Server

JeffTechnical Articles & Notes

There’s a handy way to knock all distributed SMTP AUTH attacks on the head by switching off the advertising of SMTP AUTH to all but specified IP addresses and IP address ranges. It works perfectly. For details on how to achieve this on a WHM/cPanel server, see here: http://sysadmintips.in/advanced/csf/exim Great! However there’s a problem. Many many people like to use … Read More

CloudFlare & WHM/cPanel Apache Server Firewall Conflict

JeffTechnical Articles & Notes

CloudFlare adds another level of security and resilience in front of our dedicated server. It’s an excellent idea and for basic use, it’s completely free. Fab. However, there’s a problem. Because all server traffic which is routed via CloudFlare effectively comes from CloudFlare, and because it’s imperative CloudFlare’s IP address ranges are never blocked (because one bad apple would spoil … Read More