Getting 401 unauthorization

Which opetaing system and is the password to log on to your computer or an internet connection password ?
How to change your windows password using the command line
http://www.askstudent.com/hacking/how-to-change-your-windows-password-using-the-command-line/

Change a Network Password

A network password is a combination of alphanumeric characters that users must enter in order to access a local area network.

Wireless routers use this password to protect the network from unauthorized users who could potentially steal bandwidth from the network, access sensitive data and view the information being sent to and from the network's router.

To change your network password, you must log on to the router's URL and access its security settings.

Type the router's URL into your web browser.
To access and change any settings on your router, you must log in to the router's URL.

This will allow your computer to communicate with the router and access the router's main page. When accessing the router's URL, use the same computer that was used to install the router.

If you do not know the router's URL, look for this information in the router's manual or on the manufacturer's website.

After entering the URL into the web browser's address bar, press "Enter" or click the "Go" button on the browser.

Input the router's default username and password.

Once you enter the router's URL into your web browser, a dialog box will appear requiring you to input the router's username and password. (Note that this password is not the network password.)
Unless you have previously changed the router's username and password, input the defaults.

Many routers have the default username of "admin" and have the password set as "password" or have no password at all.

To find out your router's default username and password, check the documentation that came with your router or check the manufacturer's website. Click "OK" to proceed to the router's main page.

Access the router's security settings.
Depending on your brand of router, there will be tabs or links on the router's main page.

One of these will contain the page for changing your security settings.
Find and click the link or tab.

This page will contain several textboxes, one of which will contain the SSID (name of the network) and two textboxes for changing the network password.

Select an encryption type and change the network password.
Most new routers offer WEP (Wired Equivalency Privacy) security or WPA security.

Select the type of security and change the network password by typing in a new password in the two text boxes.

When you are finished, click "OK."

Save your changes and log out.

After changing the network password, you must click "Save" or "Apply" to keep the password change.

Log out of the router by clicking the "Logout" or "Exit" link on the router's main page.

If you leave the main page open for a certain period of time, you may be logged out automatically.

This problem may be caused by a number of reasons. However, the following are the most common:

The users credentials (the username and password) are not correct.
The user account may not have the right to log on to the computer interactively (the "Log On Locally" right). In some scenarios, the user account requires "Log On Locally" right.

Check the username and the password of the user to make sure that they are correct.
If this is correct, be sure the user has the "log on locally" right granted to it.

To verify user rights, do the following:
1. Open the Local Security Policy tool from the Administrative Tools folder.
2. Click Local Policies, click User Rights Assignment, and then click the Log On Locally user right.

If the user account or group that the user belongs to is not listed, then add it.

See the Internet Information Services 5.0 documentation for more information about authentication.
This documentation can be found at the following URL example:

http://localhost/IISHelp

or

The Web server (running the Web site) thinks that the HTTP data stream sent by the client (e.g. your Web browser or our Check Up Down robot) was correct, but access to the URL resource requires user authentication 1) which has not yet been provided or 2) which has been provided but failed authorization tests.

This is commonly known as "HTTP Basic Authentication".
The actual authentication request expected from the client is defined in the HTTP protocol as the WWW-Authenticate header field. (Last updated: March 2012).

Generally this error message means you need to log on (enter a valid user ID and password) somewhere first.
If you have just entered these and then immediately see a 401 error, it means that one or both of your user ID and password were invalid for whatever reason (entered incorrectly, user ID suspended etc.).

Fixing 401 errors - general
Each Web Server manages user authentication in its own way.
A security officer (e.g. a Web Master) at the site typically decides which users are allowed to access the URL.

This person then uses Web server software to set up those users and their passwords.
So if you need to access the URL (or you forgot your user ID or password), only the security officer at that site can help you.

Refer any security issues direct to them.
If you think that the URL Web page *should* be accessible to all and sundry on the Internet, then a 401 message indicates a deeper problem.

The first thing you can do is check your URL via a Web browser.
This browser should be running on a computer to which you have never previously identified yourself in any way, and you should avoid authentication (passwords etc.) that you have used previously.

Ideally all this should be done over a completely different Internet connection to any you have used before (e.g. a different ISP dial-up connection). In short, you are trying to get the same behaviour a total stranger would get if they surfed the Internet to the Web page.

If this type of browser check indicates no authority problems, then it is possible that the Web server (or surrounding systems) have been configured to disallow certain patterns of HTTP traffic. In other words, HTTP communication from a well known Web browser is allowed, but automated communication from other systems is rejected with an 401 error code.

This is unusual, but may indicate a very defensive security policy around the Web server.

To RESET the Netgear, power up the Netgear then press and hold the RESET button at the back of the router until all the LEDs flash. Connect a LAN cable from the Netgear to the LAN port on your computer, open a browser and enter the Netgear configuration URL -
http://192.168.0.1
The default login = admin
The default PW = password You can now change the default admin password and configure the wireless settings.
Go to the wireless configuration and set up the SSID and WPA or WPA2 encryption to protect your wireless network and Internet from unauthorized access.
Now apply these settings to the wireless card in your laptop/computer.
To secure your wireless network from unauthorized access, please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

Connect a LAN cable from the D-Link to your computer's LANport, open a browser and enter the D-Link's configuration URL. OR open thebrowser on your laptop and enter the D-Link's configuration URL..
http://192.168.0.1
The default login = admin
The default PW = blank (just press Enter)
You can now configure the wireless settings. To secure your wireless network from unauthorized access,please click on this link and follow my instructions :- http://www.fixya.com/support/r3559128-wireless_router_security

Error 401 means that you can't access a web site. To fully understand the error and how we need to try and help you fix this we need to know what HTTP Error 401 - you are getting.

Example: HTTP Error 401 - Unauthorized: Access is denied due to invalid credentials.

Open your browser and enter the Linksys configuration URL.
http://182.168.1.1
The default login = admin
the default PW = admin

To secure your wireless network from unauthorized access,please click on this link and follow my instructions :-http://www.fixya.com/support/r3559128-wireless_router_security

The default login and password is admin
If you still have difficulties because you had changed the password, the you can reset the router back to the defaults by :-
Pressing the pinhole reset button with power on for 30 secs, it should restart, then enter the router's URL configuration in your Browser
http://192.168.1.1

" 401 unauthorized" authorization required " .This message means the user name and password for the router is not correct. the default password of the Linksys router is admin with no user name ( leave it blank )
If the default password is not working then the router password must be changed.
If you don't know the password of the router then you will need to reset and reconfigure the router.
Once you reset the router , it will come back to the factory default settings.
Click here for more info about router and network

The user name and or password you are typing in is wrong.
The default user name for d-link routers is admin with no password. If that changed, you can also try admin for the password.
If you aren't having any luck, it is possible that someone has gotten into your router and changed the password. To reset the router to factory, press and hold the small reset button on the back of the devide for ten seconds.
Then try to connect again.
Good Luck

Your Web server thinks that the HTTP data stream sent by the client (e.g. your Web browser or our CheckUpDown robot) was correct, but access to the URL resource requires user authentication which 1) has not yet been provided or 2) which has been provided but failed authorization tests. This is commonly known as "HTTP Basic Authentication". The actual authentication request expected from the client is defined in the HTTP protocol as the WWW-Authenticate header field.
Generally this error message means you need to log on (enter a valid user ID and password) somewhere first. If you have just entered these and then immediately see a 401 error, it means that one or both of your user ID and password were invalid for whatever reason (entered incorrectly, user ID suspended etc.).
401 errors in the HTTP cycle
Any client (e.g. your Web browser or our CheckUpDown robot) goes through the following cycle:
Obtain an IP address from the IP name of your site (your site URL without the leading 'http://'). This lookup (conversion of IP name to IP address) is provided by domain name servers (DNSs).
Open an IP socket connection to that IP address.
Write an HTTP data stream through that socket.
Receive an HTTP data stream back from your Web server in response. This data stream contains status codes whose values are determined by the HTTP protocol. Parse this data stream for status codes and other useful information.
This error occurs in the final step above when the client receives an HTTP status code it recognises as '401'.
Fixing 401 errors - general
Each Web Server manages user authentication in its own way. A security officer (e.g. a Web Master) at the site typically decides which users are allowed to access the URL. This person then uses Web server software to set up those users and their passwords. So if you need to access the URL (or you forgot your user ID or password), only the security officer at that site can help you. Refer any security issues direct to them.
If you think that the URL Web page *should* be accessible to all and sundry on the Internet, then a 401 message indicates a deeper problem. The first thing you can do is check your URL via a Web browser. This browser should be running on a computer to which you have never previously identified yourself in any way, and you should avoid authentication (passwords etc.) that you have used previously. Ideally all this should be done over a completely different Internet connection to any you have used before (e.g. a different ISP dial-up connection). In short, you are trying to get the same behaviour a total stranger would get if they surfed the Internet to your Web page.
If this type of browser check indicates no authority problems, then it is possible that your Web server (or surrounding systems) have been configured to disallow certain patterns of HTTP traffic. In other words, HTTP communication from a well-known Web browser is allowed, but automated communication from other systems is rejected with an 401 error code. This is unusual, but may indicate a very defensive security policy around your Web server.
Fixing 401 errors - CheckUpDown
When you set up your CheckUpDown account, you may optionally provide two items 2. Web Site User ID and 3. Web Site Password. You should provide these only if your site uses HTTP Basic Authentication. If you provide them, the CheckUpDown robot always uses them. This will result in a 401 error if in fact your site does not use this authentication. Conversely, if you do not provide them and your site does use this authentication, you also get a 401 error.
If however your URL is open to all comers, then an 401 message should not appear. Because it indicates a fundamental authority problem, we can only resolve this by negotiation with the personnel responsible for security on and around your Web site. These discussions unfortunately may take some time, but can often be amicably resolved.
Alternatively or the other way around is :

open the XP hosts file, and do a manual insert there.
The hosts file is located at: C:\WINDOWS\system32\drivers\etc
The entry is: 192.168.0.1 www.routerlogin.net
You might need to flush your DNS records at this point, or simply restart your computer.
And then use the following URL to access the admin page:
http://www.routerlogin.net/setup.cgi?next_file=start.htm
***Here is another solution to the problem, which is a fairly straight-forward way to disable the annoying wizard.
Type in your browser:
http://www.routerlogin.com/CA_HiddenPage.htm
Select: Disable Configuration Assistant, and click on Apply.
You can re-enable it by navigating to http://192.168.0.1/CA_HiddenPage.htm (where 192.168.0.1 is your router’s IP address)