Category Archives: General

ESXi 5.5: Get USB 3.0 Passthrough working

With ESXi 5.5 Update 3, VMWare addes USB 3.0 Passthrough support. It does this via xHCI USB adapter and the necessary drivers. When I upgraded from ESXi 5.5 Update 2 to Update 3b, USB 3.0 did not work, though. The necessary driver had not been installed automatically with the upgrade. So here is what I had to do (in PuTTY): Install the xHCI driver from the bundle I used to do the upgrade: esxcli software vib install -n xhci-xhci -d "/vmfs/volumes/datastore1/Install/VMware-ESXi-5.5.0-Update3-3568722-HPE-550.9.5.0.33-Apr2016-depot.zip" Read more [...]

Windows: Schannel error 40 and Internet Explorer

When I needed to access a secure page (HTTPS) from Internet Explorer 11 on a Windows 2008 R2 server, I always got a "Page cannot be displayed" error. I could, though, access that page from another machine or another browser on the same server. Looking in the Event Viewer I saw: Log Name: System Source: Schannel Date: 05.01.2015 12:11:58 Event ID: 36887 Task Category: None Level: Error Keywords: User: SYSTEM Description: The following fatal alert was received: 40. Schannel error 40 means: Read more [...]

Windows Active Directory: Who holds the FSMO Roles?

The easiest way to find out which Active Directory Domain Controller holds the FSMO roles is the following: Open a CMD box Type netdom query fsmo The output is something like C:\Windows\system32>netdom query fsmo Schema master               DC1.ad-domain.local Domain naming master      DC1.ad-domain.local PDC                         DC1.ad-domain.local RID pool manager            DC1.ad-domain.local Infrastructure master       Read more [...]

BES 5.0.4: How to add an administrative user

On BES 5.0.4, it is a bit tricky to add an administrative user. Normal Blackberry users are added under User > Create user, but admin users have to be added from a different menu. First, login with BESAdmin. Then, you have to go to Administrator user > Create an administrator user Then, fill in the fields, which are not self-explanatory: Display name: Use the display name from Active Directory User name: Use the AD login name Domain: Use the AD domain name Administrator Read more [...]

Most important TCP / UDP ports

I am only listing the well-known TCP/IP Ports I have ever used personally. There are of course more ports. ftp-data         20    File Transfer [Default Data] ftp              21    File Transfer [Control] ssh            22   Secure Shell telnet           23    Telnet smtp             25    Simple Mail Transfer domain           53    Domain Name Server (DNS) bootps           67   Bootstrap Read more [...]

E-Mail (SMTP) error codes

The classic SMTP error code consists of three digits (e.g. 220 mail.domain.tld SMTP ready.). The ESMTP status codes are additions to the classic code and consist of digits devided by dots (5.1.1 User unknown.). Many times you see both types of code combined (e.g. 550 5.1.1 User unknown). Find below a list of the most common codes: 2xx Request ok. Go ahead. 220 Mail service is running (ESMTP ready). 221 2.0.0 Closing connection (Mail received successfully, Goodbye). 250 2.0.0 Message accepted Read more [...]

First Post

Many times, I find it quite hard to install and configure an application properly. I am not talking about user apps like Office, but server apps like SQL. The manuals are often very detailed, but as every possible configuration is discussed, it is hard to find your way to quickly install things. Examples are often not there or not complete. In this blog, I will post my detailed configuration steps, along with screenshots, so I have my own "archive" and also as possible help for others. Happy Read more [...]