Automating Firewall Block Rules for Malicious Attackers with Nagios Logserver and OpenBSD

While Nagios Logserver is a useful tool for system analysis and central log management, it is also a great tool to analyze network security. One can actually make use logserver to improve security by using it to dynamically block IP’s from malicious attackers. Assuming you are using OpenBSD as a gateway for incoming traffic which […]

Phone (Telecom) Phishing

We received a call today to our main business line from someone who asked to “speak to the person who handles Worker’s Comp. Insurance.” The call routed to our receptionist, who wisely asked “Who’s speaking please?”, to which the caller replied, “Joey”. Our receptionist asked, “Joey from where?”. The caller replied, “Joey from Grunston”, but […]

Merging Multiple Nagios Check Outputs Using Macros

Macros in Nagios are a powerful tool. There are countless (see link) macros in existence that allow users to obtain Nagios check data easily. Among such macros, there exists $SERVICEOUTPUT$ that replaces itself with a string of the output of a chosen service. To specify such a service you can use the following syntax: $SERVICEMACRONAME:host_name:service_description$ […]