How I reset my router to the old password? And how can I use it without Ethernet cable

The Motorola WR850G is a wireless router that attaches to a cable or DSL modem. The WR850G has two reset options.
Users can reset the router and retain the settings or reset it back to factory specifications to clear all settings.
Resetting the router can help with network issues such as dropped connections.
It can also resolve situations where the user has made changes to the router's settings and can no longer connect to the router.

Look at the back of the Motorola WR850G router and locate the reset button. It is a red button located to the left of the Ethernet ports.
Press the reset button on the Motorola WR850G router, and release it immediately to reset the router without changing the settings.
Press the button on the Motorola WR850G router and hold it for longer than five seconds to reset the router to factory specifications.
This setting resets the router's IP address and subnet mask along with the user ID and password you use to log in to the router.


http://broadband.motorola.com/consumers/products/WR850g/downloads/WR850G_userguide.pdf

Assuming you mean for the Router itself
1) Make sure you have your LOG IN details for your internet account at your ISP. Make sure you have an Ethernet cable that you can run to your PC
2) Turn off the Router and look for the little 'factory reset' hole on the back (some have buttens rather than holes).
3) Push a paperclip into the hole (or hold down the button) & turn on the Router

This sets the Router back to 'factory standard. MOST Routers have the Factory password printed on a label (most of those without, you log in as 'admin' with password 'admin').

You have to use Ethernet cable because, after a Factory reset, the WiFi will be 'off'. You will have to re-enter the WiFI password (and anything else you changed form 'factory standard' such as the SSID)

Connect your router to computer with ethernet cable then you can access it with following default link. http://192.168.1.1 or http://192.168.0.1 or http://192.168.15.1 or http://192.168.2.1 If you are not able to access it with above ip then check your computers ip address gateway ip is your router ip try with it. Then it ask for user name and password. Type user as "admin" and password as "admin" or "password" or blank. Then you can see configuration page of router. If you are still not able to access router with above ip then you need to RESET it for that press RESET button for 10 seconds it is in back side of router then all settings defaults..Then you can access it with above method. . Then click on wireless->wireless security->WEP security there is code password note down it or enter new password then save setting s and restart router. then you can connect wireless with new password. Let me know if you need further assistance. Thanks for using FixYa.

On the back of your router, there should be a reset button. Press this button and set up the router again by connecting the router to your computer using an ethernet cable.

Use an Ethernet cable to connect your computer directly to the router.
Access the web-server "inside" the router.
Login to the router, with the current ID/password.
View the wireless settings:
* SSID
* encryption-level ('WPA' or better, please)
* network password

and change it, if you need to.

connect an ethernet cable to your router from pc. open IE, type 192.168.0.1 , it will ask for a user name and password, once you enter your user name and password, it will pull up the DLINK software, GUI. where you can go to wireless settings and change it to secured network. if you dont know your username and password, follow this steps:
Step 1 With the unit on, place a paper clip into the hole on the back on the unit labeled Reset.



Step 2 Hold paper clip down for 10 seconds and release.

Note: Do not repower unit during this procedure.

Step 3 The unit will reboot on its own. Once the WLAN light stops blinking, the unit is reset.

Resetting the router does not reset the firmware to an earlier version. It will change all settings back to factory defaults.

Note: The factory defaults username is admin , and there is no password.

Are you speaking about the wireless network password?
For this you will need to access the setup page of the router?
Connect the computer to the router with the Ethernet cable.
open the setup page of the router.
Go to wireless tab and change the wireless settings.
If you want to change the ' Router ' password then go to administration tab and change the router password.

Click Here for more information about the routers and network

This is usually a problem with not remembering the correct password. Quickest path to resolution is to reset the router (usually a small pin-hole that you stick something like a straightened paper clip into). Once the router is reset see if you can connect without a wireless password. Go online for only a minute and see if you can connect to google.com. Don't go wandering all over the internet, your router is unprotected at this point. If you can successfully get to google through the wireless connection without a password, unplug the internet cable (the cable between the router and the wall, modem, whatever). Using your PC browser go to the router setup menu - usually putting 192.168.1.1 in the browser address field and pressing enter works, but if that doesn't work you'll need to check the Linksys web site for the correct ip address. Locate the password setup menu and configure the settings. Note that once you set up the password your wireless connection will be disconnected and you'll have to reconnect to the router using the new password. An alternative is to connect the pc to the router with an ethernet cable during the password menu setup steps.

Using your browser, enter http://192.168.0.1 to access the D-Link router management. It may ask for a username and password. If so, use admin in both boxes.

From there, look for the box containing the SSID. It will look familiar as it’s the name you gave the router when you first set it up. That is where you change it.

Next, look in the Security section for the passphrase and you can change it here.

are you trying to access the router set up ?
First make sure that your computer will be connected to the router with the ethernet cable.
Now check the IP address and Default gateway on the computer. Default gateway will be the IP address of the router.
When you try to access the router it will always ask you for the password.
Try the default user name = admin and password = admin
or try user name = blank ( do not type anything), password = admin.
if that is not working then the password of the router must be changed.
try some different password that you use most often.
If that doesn't work then you will need to reset the router and reconfigure the router.
once you reset the router , you will loose all the settings on the router.
Reset the router for 30 seconds. unplug the power. plug it back in. wait for 1 minute and try to open the page again.
Click Here to know more about how to reconfigure the router