I was working with a coworker today to setup a new Redmine server running on top of Ubunut 12.04 and one of the steps we completed in the process was setting up LDAP authentication in Redmine. Setting up LDAP authentication in Redmine requires the server running Redmine to be joined to the Windows Active Directory domain so I needed a quick way to auth Linux on Active Directory. I have used Centrify in the past and remember it being really easy to setup authentication from any form of Linux to a Windows domain and again it did not disappoint. Follow the directions below to join a Linux server to Active Directory using Centrify.
If you ever need to write a shell script that uses either SSH or SCP to unknown hosts then you will likely have run across the issue of adding the remote host/server to the known_hosts file when automating either of the two commands are called within the script. You can easily get around this either by modifying the client computers ssh_config file or by using the -o switch available for both SSH (Secure Shell) and SCP (Secure Copy). Below we show how to modify the ssh_config file as well as an example of using each with the -o switch.
If you are working with multiple Nexpose vulnerability scanners it makes sense to want to generate a bunch of Nexpose Scan Templates on one Nexpose Seurity Console and distribute to a bunch of other Nexpose Security Console’s. There is not much documentation I could find on doing this so luckily it is fairly easy. Follow the instructions below to first export a Nexpose Scan Template from a Nexpose Security Console and then import a Nexpose Scan Template to another Nexpose Security Console. The scan templates are stored as XML so exporting consists of copying the XML file from the server running Nexpose to either your local machine or to another server running Nexpose.
I use Cygwin on Windows to make my Windows only computers as comfortable as possible to me. This comfort is provided by the Linux command line utilities that allow me to work. Cygwin provides a way for me to run these utilities from a Windows 7 command prompt. Two utilities that are really useful that are not installed with Cygwin by default are SCP (Secure Copy) and SSH (Secure Shell). Both of these utilities allow secure communication with remote computers. Below I describe adding them to an existing Cygwin Windows 7 installation.
I needed to capture some packets on a server to import into Wireshark on a Windows XP computer but hadn’t done this in awhile so I needed to refresh on how to do this. I ended up using dumpcap to capture the data, then obtain the dump file on the windows computer, and then imported into Wireshark. One thing I had a moment of trouble with was the dumpcap filter syntax. Below are some examples of how to use the filter that the dumpcap -f switch uses.
Basic dumpcap Capture[All Data]:
- dumpcap -w /path/to/file