Category: Security HowTo’s

This article shows how to install and run Nmap using the Vulners script to do vulnerability assessments. Download Nmap: yum install nmap Install the Vulners.nse script: /usr/share/nmap wget https://svn.nmap.org/nmap/scripts/vulners.nse Run a scan targetting the machine (in this example) “192.168.4.250”: nmap -sV –script vulners.nse 192.168.4.250 My output looks like this: 22/tcp

This article demonstrates how to install and configured FreeRadius for basic authentication. By “basic authentication”, I mean we’re going to configure local users in clear text. This is the simplest way to configure FreeRadius. We’re installing this on CentOS 8. Install the software: yum install freeradius freeradius-utils Add the client

If you get the error message “sql_exec_internal: sqlite3_step failed: database disk image is malformed” preventing you from starting or logging into OpenVAS, this article should help. The issue may have been caused by an unexpected power-down, but whatever caused it, the DB is corrupt. Not that this is the same

Getting a transparent proxy up and running can be troublesome especially getting it to terminate the HTTPS (TLS) connection, inspect it (if need be) and re-terminate it. Most businesses these days don’t want to actually inspect the traffic but can’t go without some-kind of internet monitoring so a minimalistic transparent

This article is a short walk-through demonstrating the process of installing and configuring mod_security on Apache. In this tutorial, we’ll be using CentOS 7. We’re starting with a pre-configured and running web server running httpd listening on port 80 and 443. There’s no other services such as Varnishor Nginx running.

This article shows the Jason for a custom IAM policy to allow snapshots with the minimum required access. I bet it can be improved upon but this is pretty close. { “Version”: “2012-10-17”, “Statement”: [ { “Effect”: “Allow”, “Action”: [ “ec2:CreateSnapshot”, “ec2:DeleteSnapshot”, “ec2:Describe*”, “ec2:CreateTags” ], “Resource”: “*” } ] }

This article shows how firewalld priorities rules and zones. The priority of zones is in alphabetical order. So the “block” zone is checked before the “dmz” done. And within a zone, the rules are applied in the order they were added. As we know, rules are in the order they

This article notes the AWS EC2 Security Group that should be associated with an EC2 to permit a roaming VPN client to connect to an IPSec/L2TP hosted on a server within AWS. * TIP: The AH and ESP are entered in as just numbers, not the “AH” and “ESP”.