Manage your router with Router Commander

Note:  When logging into router commander you must enabled telnet on the router and although you login in as administrator or admin in the webgui, you may need to log in as root as the user.  (This is the case with DD-WRT).  Also remember it will take up to two minutes to gather data and the program will hesitate when going to things such as the connection wizard or other options.  This does NOT mean the program is not working.  Be Patient.

This data took a few minutes to update.  Once it started, it runs very smooth.

Want to manage your router graphically (Excellent graphics to show connections and other information) and see how much memory and bandwidth it is using?  Router Commander allows you to troubleshoot and tweak your router. (I did NOT install the toolbar).

  • Performance Graphs
  • Connections
  • SysLog
  • Bandwidth
  • Access
  • Port Forwarding
  • IP Settings
  • DSL Settings
  • Wireless

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Note:  You may need to open the Programs and features –  Turn Features on and off – enable Telnet in Windows 7/8/10 in order to communicate with your router with router commander.

Router Commander also offers SSH connection for secure communications with your router.


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Enable SSH on your Router

SSH is a secure way to program your router remotely.  SSH provides the encryption you need to avoid MtM (Man in the Middle Attacks).

In many routers, you’ll find SSH under the Administration menu.   This can be enabled to program your router or monitor it from afar.

Here’s a cheap E1500 with tomato firmware.  Under the Administration menu, you’ll find SSH.  You’ll need putty and puttygen in order to program SSH in tomato.

Putty Where to get

Download Putty and PuttyGen.  Login to your router and find where to enable SSH.  (You may not need PuttyGen on your router)  Enable SSH on Startup, Enable Remote and generate a key with PuttyGen if necessary.  For security, you should have the latest firmware, a complex password and filter IP addresses.  If you plan to SSH from an offsite location, find the public IP address of your company and enter it.

ssh key



Once the key is entered and your security is set, save and allow your router to reboot.  (The key below is used in a non-production lab).1 Tomato Enable SSH2 Tomato Enable SSH

Once the router has been configured, use Putty to login to your router.

Putty config


2 putty

Once you SSH, you can look at processes, configure your router and more.

Here’s an example of using the command TOP to see running processes.


Using ip addr to see IP address information.


Here’s a good tutorial on SSH on routers from DD-WRT.   With OpenWRT, DD-WRT and the variants of Tomato, you can have more control over your router.



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Speed up your router by tweaking “Maximum Ports”

One of the many ways to speed up your WAN can be to tweak your Maximum Ports if you use DD-WRT.

While paying for 20 meg, after an update, I dropped to 2.6 mbps.   Upon investigating, all of my settings were the same except that the Maximum Ports had increased to 2048.  The older router has very little ram, so I slowly decreased the amount until the magical number of 1024 was established.

By decreasing my Maximum Ports to 1024 on an older Netgear router,  my download increased by 17 mbps.  (Average user)


Decreasing this number can prevent router slowdowns also.

This will depend on the amount of memory your router has and if you use QoS or P2P.

This setting is found under Administration in DD-WRT at the bottom of the page.



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Internet or network application slow? You may need to temporarily disable Nagle’s Algorithm

With the Nagle-Algorithm, Windows takes small packets and packages them in to more manageable and efficient sizes.   If you have poor latency, you might try to disable the Nagle-Algorithm.  Nagle’s algorithm helps to control congestion when small packets are sent continuously by TCP.   When enabled, this helps to prevent a flood of these packets.

More information –’s_algorithm

How to disable Nagle’s algorithm-

Open regedit.exe.  Navigate to HKey_Local_Machine\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\

Find the interface that has your current IP address (see example below)

Find IP address

Add the following values and make sure they are set to 1.

TcpAckFrequency and TCPNoDelay

Add values

This is only a temporary fix for the reduction of some applications on the internet.  Once your project or need is fulfilled, you should re-enable the algorithm by deleting the keys and rebooting or changing the values.

Posted in Microsoft Windows 10, Technology, Windows 10, Windows 10 Quick Tips | Tagged , , , , , , , | Leave a comment

Add Safe Mode to Windows 10

Need to add Safe Mode to Windows 10 for troubleshooting?

  • Open a Command Prompt as an Administrator.
  • Type the following in the command prompt and hit enter after each line

bcdedit /copy {current} /d “Windows 10 Safe Mode”
bcdedit /copy {current} /d “Windows 10 Safe Mode – Networking”
bcdedit /copy {current} /d “Windows 10 Safe Mode – Command Prompt”

Next –

  • Click on Start
  • Type MSConfig
  • Hit Enter
  • Click on Boot

You should see your entries.

Highlight Safe Mode and match the picture below for Safe Mode.

Note – I added 30 seconds so the choice stays on screen for 30 seconds. Adjust this number however you like.  The default is to load Windows.

safe mode

Next, highlight Networking and select the information in the picture below


For the command prompt, click Safe boot, Alternate shell.

Upon booting, you’ll see this –


NOTE – Remember to always backup your system and you have to check the Make all boot settings permanent.

Good luck!

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Windows 10 Shell Commands you can run from the ‘Run’ line

The following shell commands can be ran from the ‘run’ line in Windows 10

shell:AccountPictures %AppData%\Microsoft\Windows\AccountPictures
shell:AddNewProgramsFolder Control Panel\All Control Panel Items\Get Programs
shell:Administrative Tools %AppData%\Microsoft\Windows\Start Menu\Programs\Administrative Tools
shell:AppData %AppData%
shell:Application Shortcuts %LocalAppData%\Microsoft\Windows\Application Shortcuts
shell:AppsFolder Applications
shell:AppUpdatesFolder Installed Updates
shell:Cache %LocalAppData%\Microsoft\Windows\INetCache
shell:Camera Roll %UserProfile%\Pictures\Camera Roll
shell:CD Burning %LocalAppData%\Microsoft\Windows\Burn\Burn
shell:ChangeRemoveProgramsFolder Control Panel\All Control Panel Items\Programs and Features
shell:Common Administrative Tools %ProgramData%\Microsoft\Windows\Start Menu\Programs\Administrative Tools
shell:Common AppData %ProgramData%
shell:Common Desktop %Public%\Desktop
shell:Common Documents %Public%\Documents
shell:CommonDownloads %Public%\Downloads
shell:CommonMusic %Public%\Music
shell:CommonPictures %Public%\Pictures
shell:Common Programs %ProgramData%\Microsoft\Windows\Start Menu\Programs
shell:CommonRingtones %ProgramData%\Microsoft\Windows\Ringtones
shell:Common Start Menu %ProgramData%\Microsoft\Windows\Start Menu\Programs\Startup
shell:Common Startup %ProgramData%\Microsoft\Windows\Start Menu\Programs\Startup
shell:Common Templates %ProgramData%\Microsoft\Windows\Templates
shell:CommonVideo %Public%\Videos
shell:ConflictFolder Control Panel\All Control Panel Items\Sync Center\Conflicts
shell:ConnectionsFolder Control Panel\All Control Panel Items\Network Connections
shell:Contacts %UserProfile%\Contacts
shell:ControlPanelFolder Control Panel\All Control Panel Items
shell:Cookies %LocalAppData%\Microsoft\Windows\INetCookies
shell:Cookies\Low %LocalAppData%\Microsoft\Windows\INetCookies\Low
shell:CredentialManager %AppData%\Microsoft\Credentials
shell:CryptoKeys %AppData%\Microsoft\Crypto
shell:desktop Desktop
shell:device Metadata Store %ProgramData%\Microsoft\Windows\DeviceMetadataStore
shell:documentsLibrary Libraries\Documents
shell:downloads %UserProfile%\Downloads
shell:dpapiKeys %AppData%\Microsoft\Protect
shell:Favorites %UserProfile%\Favorites
shell:Fonts %WinDir%\Fonts
shell:Games Games
shell:GameTasks %LocalAppData%\Microsoft\Windows\GameExplorer
shell:History %LocalAppData%\Microsoft\Windows\History
shell:HomeGroupCurrentUserFolder Homegroup\(user-name)
shell:HomeGroupFolder Homegroup
shell:ImplicitAppShortcuts %AppData%\Microsoft\Internet Explorer\Quick Launch\User Pinned\ImplicitAppShortcuts
shell:InternetFolder Internet Explorer
shell:Libraries Libraries
shell:Links %UserProfile%\Links
shell:Local AppData %LocalAppData%
shell:LocalAppDataLow %UserProfile%\AppData\LocalLow
shell:MusicLibrary Libraries\Music
shell:MyComputerFolder This PC
shell:My Music %UserProfile%\Music
shell:My Pictures %UserProfile%\Pictures
shell:My Video %UserProfile%\Videos
shell:NetHood %AppData%\Microsoft\Windows\Network Shortcuts
shell:NetworkPlacesFolder Network
shell:OneDrive OneDrive
shell:OneDriveCameraRoll %UserProfile%\OneDrive\Pictures\Camera Roll
shell:OneDriveDocuments %UserProfile%\OneDrive\Documents
shell:OneDriveMusic %UserProfile%\OneDrive\Music
shell:OneDrivePictures %UserProfile%\OneDrive\Pictures
shell:Personal %UserProfile%\Documents
shell:PicturesLibrary Libraries\Pictures
shell:PrintersFolder All Control Panel Items\Printers
shell:PrintHood %AppData%\Microsoft\Windows\Printer Shortcuts
shell:Profile %UserProfile%
shell:ProgramFiles %ProgramFiles%
shell:ProgramFilesCommon %ProgramFiles%\Common Files
shell:ProgramFilesCommonX64 %ProgramFiles%\Common Files
shell:ProgramFilesCommonX86 %ProgramFiles(x86)%\Common Files
shell:ProgramFilesX64 %ProgramFiles%
shell:ProgramFilesX86 %ProgramFiles(x86)%
shell:Programs %AppData%\Microsoft\Windows\Start Menu\Programs
shell:Public %Public%
shell:PublicAccountPictures %Public%\AccountPictures
shell:PublicGameTasks %ProgramData%\Microsoft\Windows\GameExplorer
shell:PublicLibraries %Public%\Libraries
shell:Quick Launch %AppData%\Microsoft\Internet Explorer\Quick Launch
shell:Recent %AppData%\Microsoft\Windows\Recent
shell:RecordedTVLibrary Libraries\Recorded TV
shell:RecycleBinFolder Recycle Bin
shell:ResourceDir %WinDir%\Resources
shell:Ringtones %ProgramData%\Microsoft\Windows\Ringtones
shell:Roamed Tile Images %LocalAppData%\Microsoft\Windows\RoamedTileImages
shell:Roaming Tiles %AppData%\Microsoft\Windows\RoamingTiles
shell:SavedGames %UserProfile%\Saved Games
shell:Screenshots %UserProfile%\Pictures\Screenshots
shell:Searches %UserProfile%\Searches
shell:SearchHistoryFolder %LocalAppData%\Microsoft\Windows\ConnectedSearch\History
shell:SearchHomeFolder search-ms:
shell:SearchTemplatesFolder %LocalAppData%\Microsoft\Windows\ConnectedSearch\Templates
shell:SendTo %AppData%\Microsoft\Windows\SendTo
shell:Start Menu %AppData%\Microsoft\Windows\Start Menu
shell:StartMenuAllPrograms StartMenuAllPrograms
shell:Startup %AppData%\Microsoft\Windows\Start Menu\Programs\Startup
shell:SyncCenterFolder Control Panel\All Control Panel Items\Sync Center
shell:SyncResultsFolder Control Panel\All Control Panel Items\Sync Center\Sync Results
shell:SyncSetupFolder Control Panel\All Control Panel Items\Sync Center\Sync Setup
shell:System %WinDir%\System32
shell:SystemCertificates %AppData%\Microsoft\SystemCertificates
shell:SystemX86 %WinDir%\SysWOW64
shell:Templates %AppData%\Microsoft\Windows\Templates
shell:ThisPCDesktopFolder Desktop
shell:UsersFilesFolder %UserProfile%
shell:User Pinned %AppData%\Microsoft\Internet Explorer\Quick Launch\User Pinned
shell:UserProfiles %HomeDrive%\Users
shell:UserProgramFiles %LocalAppData%\Programs
shell:UserProgramFilesCommon %LocalAppData%\Programs\Common
shell:UsersLibrariesFolder Libraries
shell:VideosLibrary Libraries\Videos
shell:Windows %WinDir%



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Cannot access computer after sharing a folder

TCAT Shelbyville - Technical Blog

If you have ever replaced a network card on a server or computer and you can no longer access the computer or you shared a folder and cannot access it, you should flush any cache on the workstation that is accessing the server.

Insure no other users are logged in –

Open a Command Prompt as an Administrator (Type CMD in the search box)

ipconfig /flushdns

ipconfig /registerdns

nbtstat –s

nbtstat -r

nbtstat –c

nbtstat –R

nbtstat -RR

nbtstat –n

nbtstat -a      (replace the x’s with the IP address of the computer you are accessing – the computer with the new NIC card)

Also insure the NetBIOS over TCP/IP radio button is selected. (See Below)

To enable NetBIOS over TCP/IP on Windows 7 or Server 2008 R2:

  1. Click Start, and then click Network. (click Start, type ncpa.cpl into the search box for Windows 7 or…

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Microsoft Windows Server R2 or Windows 7 rebooting while configuring updates

TCAT Shelbyville - Technical Blog

Great tip from Josh –

If Microsoft Server R2 or Windows 7 is stuck rebooting while configuring updates (pic below), follow these steps –

Problem-Windows Server R2 stuck in boot loop

  • Boot from the Server 2008 DVD (or Windows 7)
  • Select the command prompt
  • Type   del c:windowswinsxspending.xml    
  • (This can be done in safe MODE in SOME situations see below)
  • Once this is done, reboot to the HDD

If you use safe mode, you may get an access is denied when deleting 

  • Click the orb – All programs – Accessories, right-click “command prompt” and select “Run as Administrator” (or type CMD in the search box and right-click and Run as Administrator
  •  In this case, you may have to take ownership –

Type the following commands

takeown /f C:Windowswinsxspending.xml

cacls C:Windowswinsxspending.xml /G Username:F

del C:windowswinsxspending.xml

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An attempt was made to reference a token that does not exist

TCAT Shelbyville - Technical Blog

When opening manage or the  “Microsoft Management Console (MMC)”  you recieve
An attempt was made to reference a token that does not exist”.


Open a Command Prompt ( Search for CMD) (right click and run as administrator) and navigate to


Re-register the required DLL files by using the following command:

For /F %s in (‘dir /b *.dll’) do regsvr32 /s %s

Also run SFC /SCANNOW from the command prompt (Elevate permission) if the above does not work.

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Watch hackers break into the US power grid

Read more:

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Tech Thoughts Net News – Monday – May 30, 2016 – Bill Mullins is back!

The free Windows 10 upgrade expires July 29;  How to monitor your servers and desktops from Android with this free app;  26 Hidden Chrome Features That Will Make Your Life Easier;  How to get Windo…

Source: Tech Thoughts Net News – Monday – May 30, 2016

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A FREE Tool That Allows You To Quickly Turn OFF/ON (and Schedule) Your Internet Connection

Another excellent find. Thanks Rick!

What's On My PC

I have featured the tool InternetOff here on the blog before. Recently I noticed that InternetOff has now been upgraded to include a scheduling feature, which give you the ability to schedule your access to the internet. 

InternetOff allows you to quickly turn off the internet so that you can go offline. When you need the connection, you can enable the internet easily for some period (and it will be automatically turned off) or permanently in just two clicks. Besides the program lets you password protect and schedule access to the internet.

This tool is a great asset if you are on a metered connection (such as satellite); to shutdown the internet to protect your PC from potential security threats; to shutdown (and schedule) your children’s usage; OR, to simply shutdown the internet to avoid the distractions (such as notifications from email, facebook, twitter, etc…), so that you can work…

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A Tool To Easily Download Windows and Office ISO Images

Excellent find! We’re always asked how to download ISOs.

What's On My PC

If you need to download ISO disk images for Windows 7, 8.1 or 10, as well as Office 2007 and 2010, you may want to look at this download tool. It is called Microsoft Windows and Office ISO Download Tool

This tool was not developed by Microsoft; instead, by a private party software developer who made this software so that you can easily download the various Microsoft Windows and Office images you desire, without going on the hunt for those images.

Ever since Microsoft pulled the Windows disk images from Digital River, hunting for untouched ISO files has been a pain. Our new tool will make your life easier, and provides and interface to Microsoft TechBench to download original Windows images directly from Microsoft’s server.

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Atheros Wireless Drivers

Need an update and stable version of your Atheros Wireless Drivers?

Often the wireless drivers found at,  , are more stable than the manufacturer.


Posted in Technology, Wireless | Tagged , , | 1 Comment

The 2016 Dean’s List: EdTech’s 50 Must-Read Higher Ed IT

Blogging about the hottest education technology issues, these admin all-stars, IT gurus, education community experts and classroom leaders have proven their worth to their peers… Read More

TCAT Shelbyville’s Blog in the top 50!

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We’re back! News, events and more

The Computer Information Technology program is back after more than a month of not blogging.

With the 2016 Cyber Security Summit in Murfreesboro at MTSU, the TN Fusion Center asked the program to once again put on a Capture the Flag and to present a password/MiTM live demonstration.

The event was held on May 10th/11th at MTSU and had more than 400 attendees from Federal, State, Local, infrastructure along with IT professionals.

Pictures from the event can be found here –

Tech Insider – Secret Chrome Features

PC World –
It’s cheap and easy to make your own portable hard drive from an old PC drive

Who is a target for Ransomware?

Hands on: New build of Windows 10 Anniversary Update preview tweaks Edge, Wi-Fi Sense

PC World-
The Petya ransomware just got a whole lot worse

PC World-
How to create an image backup in Windows 10 and restore it, if need be

Microsoft Free eBooks now include Windows 10 and Server 2016




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Update for Microsoft Office 2013 (KB2837655) RT – Error 0x80240017

Update for Microsoft Office 2013 (KB2837655) RT – Error 0x80240017

Experiencing this error during a Microsoft Windows 10 Update?  Download the update manually from here and the error should go away.

Didn’t work? Open a command prompt as an administrator and copy and past this into the command prompt.  Reboot and try your updates again.

net stop wuauserv
net stop cryptSvc
et stop bits
net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old
ren C:\Windows\System32\catroot2 Catroot2.old
net start wuauserv
net start cryptSvc
net start bits
net start msiserver

Posted in Microsoft, Microsoft Office, Microsoft Windows, Microsoft Windows 10, Technology, Windows 10, Windows 10 Quick Tips | Tagged , , , | 1 Comment

Setting the optimal MTU inside of your router

TCAT Shelbyville - Technical Blog

How you find the optimal MTU settings is truly a matter of opinion.  Here is what we do…remember setting firewalls, routers and your computer will truly tweak out your connection.  Start on the outside and change your router or firewall first and then each computer (Use TCPOptimzer for computers).  Don’t forget access points and other devices.

  • Find an ISP or a website you can ping.
  • Ping the website from the command prompt (Windows) using the following command
  • ping -f -l 1472   (the -l is an “L” that is a lowercase and there is a space between each command and switch)
  • Hit the enter key
  • If you receive the message of fragmentation, reduce by 10 or 20 until you get responses.  Increase the number by 1 until you are 1 less away from getting a fragmentation message (midpoint – between high and low)
  • Now add 28 to this number…

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AlphiMAX PTP Estimator provides an excellent way to align your wireless antennas

TCAT Shelbyville - Technical Blog

Need an excellent program to estimate your wireless bridges from building to building?  AlphiMAX provides an excellent online program to estimate your wireless links.

Sign up is easy and fast.  The PTP Estimator requires that you have the Latitude and Longitude of both buildings.  You can get an estimated Lat. and Long. from Google maps.  Find your location on Google maps (you should use a GPS) and right click on the location you want then select “What’s here?” .    This will provide the numbers you need.  Remember, it is best to use a GPS on each site where you intend to erect an antenna.

PTP Estimator

You can also search for a location by name by clicking the area in the center of the online application.  icon

Once you have the Lat. and Long., enter the numbers at the top of the online application.  Click Estimate.

Entering LatandLong

The interface will…

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Atheros Wireless Drivers

TCAT Shelbyville - Technical Blog

Need an update and stable version of your Atheros Wireless Drivers?

Often the wireless drivers found at,  , are more stable than the manufacturer.


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