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0

(Ubuntu) sha1sum and (Windows) fciv are returning different SHA1 hashes

Posted on June 12, 2015
Microsoft

I’m shuffling a few 1TB images from a Ubuntu machine to a Windows box. Thinking I’d be slick, I used sha1sum to calculate the SHA1 hash of the first image before sending.

Linux, Security, Windows Cryptography, Encryption, Hashing, Linux, SHA1, Ubuntu, Windows
3

Windows Server 2012 – DHCP error 20079: The specified servers are already present in the Directory Service

Posted on June 11, 2015
Microsoft Modern Logo

So, I did something stupid.

Windows Active Directory, DHCP, Migration, Windows Server 2012
0

Windows Server 2012 – Command “Export-DhcpServer not found”

Posted on June 11, 2015
Microsoft Modern Logo

I haven’t done a lot with Windows systems lately but figure it’s about time to migrate my home domain to something a little more modern, like an OS whose successor is going to be released any day now.

Windows Windows Server 2012
0

Windows – How to track bandwidth usage of a single machine?

Posted on April 21, 2015
Windows Resource Monitor

Verizon just called and said you’ve gone over your bandwidth limit for the month. Now you owe them $2500 for overages and don’t understand why.

Networking, Windows NetBalancer, Resource Monitor, Windows 7, Windows 8, Windows Server 2008, Windows Server 2012
0

Outlook 2013 – Business Contact Manager fields incorrect, wrong

Posted on March 26, 2014
Office 2013

Outlook 2013 client using BCM; has been working fine for about a month. The virtual machine was created about that long ago. User is now reporting that when he tries to add contacts, the fields do not match up with… Continue Reading →

Articles, MS Office, Windows Outlook
0

The account is not authorized to login from this station

Posted on February 9, 2014
Microsoft

Windows 7 workstation on a Server 2010 domain, all of a sudden one computer is unable to access network shares on another client. Was receiving “The account is not authorized to login from this station” error messages. Logged on to… Continue Reading →

Articles, Networking, Windows
0

LDAP: What is it?

Posted on October 23, 2011
Linux

Networks are expanding constantly, with new workstations, servers, printers, and other services being added and removed all the time. It can be difficult, if not impossible, for humans to keep track of all these assets and know how and where… Continue Reading →

Articles, Linux, Networking, Windows
0

LDAP: How it works

Posted on October 13, 2011
Linux

The LDAP model is based on entries, which are collections of attributes that describe the directory structure. Attributes each have names, types, and corresponding values (“Understanding LDAP,” 2004). Entries are arranged in an upside-down tree-like pattern, starting with a root… Continue Reading →

Articles, Linux, Networking, Windows
0

SMTP: Best practices

Posted on October 2, 2011

RFC 5068 recommends not using regular SMTP over port 52 in favor of authenticated SMTP over port 587 (Sender Policy Framework, 2007). Otherwise the server can be used as a mass relay for spam, tying up resources from rejection notices… Continue Reading →

Articles, Linux, Security, Windows
0

SMTP: How it works

Posted on October 2, 2011

When client sends email, the client connects to port 25 of the email server (via the SMTP port) and sends a HELO command (Tschabitscher, n.d.). The client “addresses the envelope” by specifying who is sending the email and who is… Continue Reading →

Articles, Linux, Windows
0

Windows – How to change the startup directory for a Command Prompt

Posted on August 23, 2010
Windows Classic

Two ways to do it– Tweak the registry and alter the startup directory for every instance of the command line henceforth opened, or Create a shortcut to “cmd.exe” and change the Start In property of the shortcut to the directory… Continue Reading →

Articles, Windows
0

Windows XP – “Loading your personal settings” slow

Posted on August 10, 2009
Windows Classic

I have two non-administrative accounts and one administrative account. All accounts log in very slow after I reinstalled some sound card drivers. During the course of troubleshooting, I did find out that the problem is limited to the first account… Continue Reading →

Articles, Networking, Windows

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About

In a past life, I was a data entry clerk who quickly got tired of lost productivity due to cumbersome user interfaces and set out to do something about it.

I have a passion for increasing business efficiency at both the user and systems levels, while also being mindful of the need for information security.

Having a B.S. in Information Security and Assurance, I've found my niche in web/relational database development, which I have been doing for several years now.

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