A chronological documentation test project, nothing serious, really!
This post describes how you can download and install the latest version of VMware Tools to a linux guest from a ESXi 5.0 host. You need SSH access rights to a VMware host to follow this guide. Allow SSH access to the VMware host you are about to access. This can be done in the […]
I always forget where to change the ping setting in the Windows Server 2008 R2 Firewall. To enable ping Go to Start >> Administrative Tools >> Windows Firewall with Advanced Security >> Inbound Rules >> File and Printer Sharing (Echo Request – ICMPv4-IN) >> right click and select Enable Rule. To disable the ping rule […]
What is Port Knocking? Port knocking is a method by which you can dynamically open ports on your server to a single IP address. Port knocking allows you to transparently run a service on your server without exposing the services of that port to all IP addresses. In practice, it is very similar to having […]
It is ideal to slow down the SSH dictionary attack when the infested host started to brute force the SSH authentication. There are many scripts/user-land daemons that perform monitoring and blocking. I prefer to use something that has less demand in memory/CPU usage. IPTables module provides a kernel level solution with little overhead.
In RedHat/Fedora you can define firewall rules in the file /etc/sysconfig/iptables. By adding this line you open ports in the range 5920-5960 -A RH-Firewall-1-INPUT -p tcp –destination-port 5920:5960 -j ACCEPT