The operation failed The specified user already exists

Exact Error: the operation failed because the attempt to join this computer to the domain failed the specified account already exists

Solution: In my existing AD, I went under "Domain Controllers" OU and saw an entry of the host name of the second DC that i have been unsuccessfully attempted before. I deleted/demoted the second DC from the entry, and went back to the second DC and re-initiated the DCPROMO. It is now completing the wizard.

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test vpn bandwidth and speed with iperf

This article explains how to use a free utility called iPerf to test the speed of a VPN connection. In this example I am running iPerf on windows but there are other versions available (i.e. Linux). Download iPerf from http://linhost.info/2010/02/iperf-on-windows/ Put a copy on 2 computers with 1 either side of the VPN. In this example I have put in the c:\triangle folder On the “server” PC open a cmd prompt and navigate to the folder containing iperf. Note on computers running Win7 or Win2008 I recommend running the cmd prompt in elevated mode. Run the command iperf –s On the “client” PC open a cmd prompt and again navigate to the folder containing iperf. Run the command iperf –c After a short while the estimated bandwidth is displayed.

System information remotely

systeminfo /s servername /u domainname\username /p userpassword /fo table systeminfo /s servername /u domainname\username /p userpassword /fo table >1.csv and then type 1.csv then we will get the results in CSV formate

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