SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
Set ServicePrincipalName for Service Account
Summary: How to set a ServicePrincipalName.
Date: Around 2013
Refactor: 6 April 2025: Checked links and formatting.
While doing an AD migration from AD 2003 to AD 2008 I came across an issue with an application. This application was already installed on a server in the new domain, however, before the migration the users would use their accounts from the old domain. After the migration we found it was impossible to log on from a client server. Only if we would install the client on the application server itself logging using the new accounts would work.
Eventually we found the error in one of the logfiles, and with that, the solution as well.
Just for reference sake, the name of the application was Algo Collateral 5.2.1
Sendmail Security Quick Fixes
Summary: As one of the most enduring Unix applications and one of the most ubiquitous, sendmail has been the target of numerous attacks over the years – from buffer overflows to denials of service. And, even with constantly improved security, sendmail can be prodded into a state of improved security through a number of quick fixes that any sysadmin can make to reduce the vulnerability of their sendmail servers.
Date: Around 2015
Refactor: 2 January 2025: Checked links and formatting.
Securing NetApp
Summary: This article is about securing access to a NetApp filer.
Date: 11 May 2011
Refactor: 3 January 2025: Checked links and formatting.
We'll discuss the following options in securing access:
- Recreate SSL Certificates
- Enabling SSH access
- Disabling Telnet access
- Allowing multiple sessions
- Using an Administrative Host
- Defining users in a LDAP environment
- Using privileged commands
Note that wherever possible I'll use the command line to change settings. Only when using other tools gives an more clear overview I'll use other tools.
Script: Bash: Changing a Config File on Multiple SSH Servers
Summary: How to change a config file on multiple esx servers using ssh.
Date: Around 2015
Refactor: 6 April 2025: Checked links and formatting.
I want to change a config file on multiple esx servers to solve the problem that after updating them to ESX version 4.1 I can't copy/paste into the VM console anymore. The solution is to add two lines to the /etc/vmware.config file. But I don't want to log on to each host and make the change. And ssh doesn't allow for passwordless logons unless you use key authentication. In this case I didn't want to do key authentication so created and used this script to solve my problem.