this will describe the steps to setup a MailRelay for internal use the accepts SMTP Mails and relay it over a secure TLS connection with authification to an external mail provider on top of Debian 8 Jessie.
Continue reading Postfix: Internal Mailrelay with Auth and TLS encryption to Provider →
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in his office, a customer have a few Avocent KVM switches to control some client computers in a remote room. He ask me about the possibility to get a list of all computers connected to these boxes, because he do not want to maintain any list by hand.
I research the documention but there is no (scripting) interface from which I could get such a list. SSH is only for connecting serial consoles, SNMP offers no OIDs for such a case.
Because of the costs, DSView isn’t a option. The only way seems to be to extracting the list by reading the Webfrontend HTML output. Let us do this 🙂
I wrote a script in powershell, at least version 2 is needed to handle selfsigned SSL certificates, which do the following:
- Login to the Webfronted with https and SSL encryption by System.Net.HTTPWebRequest class to get the authentification cookie
- Get the Device HTML page by .NET class System.Net.Webclient and using Authentification cookie
- Save HTML do a temporary file
- Open the file with Internet Explorer
- Get the URL to start a KVM session, computername and portnumber by DOM
Define the User, Password, protocol and the devices:
# KVM User
# KVM Password
# Your Devices
Built HTTP POST text and disable SSL certificate warnings
Continue reading Script to get a list of computers connected to a Avocent KVM switch →