The rar and unrar packages are not available from the default yum repositories on CentOS Linux so you will need to install the rpmforge repo to install these packages via yum. Read this article for steps on how to install the rpmforge repository on CentOS Linux. Once installed you can install rar and unrar using the syntax below.
I have a client with a Cisco 2811 with primarily Cisco 7960 phones configured off of it. Recently hey switched their telecommunications provider but didn’t get a POTS line for the fax machine. I am going to try to configure a PAP2T-NA to convert from SIP to POTS for the fax machine to see if it works but first wanted to make sure he PAP2T-NA had the latest and greatest firmware on it. Upgrading the firmware is really easy with an application that is downloaded with the firmware itself. Follow the directions below to upgrade the firmware on your Linksys PAP2T-NA.
Recently I have started using Hashcat-gui a lot more to test the strength of various passwords for certain clients. One of the things I wasn’t sure of at first was how to save charsets in the Bruteforce Settings window and while it would be nice if you could have a text file that included various charsets you could select from the drop down menu it is also easy to save your preferred charsets as Hashcat Jobs. Below is information on how to save charsets as Hashcat Jobs as well as recommended charsets you might want to save.
Hashcat is an excellent tool to use or security audits of passwords. I will be doing a series of articles relating to anything from simple brute forcing such as the article to more complex techniques using Hashcat, oclHashcat, and the Hashcat-gui on both Windows and Linux operating systems. The goal is to make people more aware of the technologies available to crack passwords which should allow people to audit their companies passwords for more strict enforcement. This article relates to using the Hashcat-gui on Windows 7 to crack 10 MD5 hashes and assumes that you already have successfully installed Hashcat and the Hashcat-gui.
I was working on an article a couple days ago with a friend and he had sent over some commands for me to reference in the article which included the “sort -R” command. The sort -R switch will randomly sort the contents of a file which is very useful in certain situations. The problem is that the sort command which is installed by the coreutils RPM package on CentOS does not include the -R switch because it is to old. Below I describe the issue in more detail and provide references on how you could upgrade sort on CentOS Linux.