First go to start, programs, accessories, MS-DOS Prompt. In the window type 'ipconfig /all' without parentheses, then press enter.
a. Class A 255.0.0.0 b. Class B 255.255.0.0 c. Class C 255.255.255.0
Example: 197.15.22.0.
ifconfig.
Google it.
Get Subnet Mask, IP Address, Gateway etc.For windows users go to START button in bottom left corner then to RUN then type COMMAND in the box - the mini DOS prompt will open in a separate window. Then type ipconfig/all and all the information you desire will be listed - ip address, default gateway, subnet mask etc.......
You can't find the gateway or any other address in a subnet mask; the subnet mask is used to separate the parts of an address - the network id part and the host id part. Look at other settings for the gateway, such as ipconfig or ifconfig
Use the 'ifconfig' command on your adaptor, or just 'ifconfig -a'
A simple way of finding out your computer's external subnet mask in Windows is to go to Start and select Run. Type ipconfig into the box, press the Enter key on the keyboard and a dialogue box will pop up with the required information.
Click on start>Run>CMD, then type "ipconfig". This command will show you the default gateway on the computer. -Nitin
To find your subnet mask and gateway you will need to open a command prompt as administrator. In the command prompt type "ipconfig/all" without the quotes. It will then display all of your network information alone with those IPs.
On Windows systems:Click Start > Run. Then type: cmdThe 'DOS' box will open, type: ipconfig /all(Note: there is a SPACE after the word ipconfig) The information displayed will be similar to the below if you have a single address;C:\Documents and Settings\xxxx>ipconfig /allWindows IP ConfigurationHost Name . . . . . . . . . . . . : machinePrimary Dns Suffix . . . . . . . :Node Type . . . . . . . . . . . . : UnknownIP Routing Enabled. . . . . . . . : NoWINS Proxy Enabled. . . . . . . . : NoDNS Suffix Search List. . . . . . : hsd1.ma.comcast.net.Ethernet adapter Local Area Connection:Connection-specific DNS Suffix . : hsd1.ma.comcast.net.Description . . . . . . . . . . . : 3Com EtherLink XL 10/100 PCI TX NIC (3C905B-TX)Physical Address . . . . . . : 00-10-5A-13-53-F7Dhcp Enabled. . . . . . . . . :YesAutoconfiguration Enabled. . . :YesIP Address. . . . . . . . . . . . : 65.12.23.123Subnet Mask. . . . . . . . . . . : 255.255.248.0Default Gateway. . . . . . . . : 66.31.48.1DHCP Server. . . . . . . . . . : 68.87.71.8DNS Servers . . . . . . . . . . . : 68.87.71.22668.87.73.24268.87.64.146Lease Obtained: Friday, April 17, 2009 12:34:21 PMLease Expires: Tuesday, April 21, 2009 12:34:21 PMNote: Type the word: exit > then hit the Enterkey to close the DOS session.On Mac or Linux/Unix systems:Launch the Terminal located in /Applications/Utilities/Type the following command:ifconfigYou will see most of the same info as the Windows example above. Your IP, subnet mask and gateway will all be clearly marked.
On Windows you can enter the command inetconfig /all On Linux it's ifconfig -a Or if it's another machine on the same subnet as your computer (that piece is important) then you can ping it and then run arp -a. That will show you resolved MAC addresses in cache.
where do I find the security code on the Gateway att. wireless modem?
If on Windows: Start, Run..., Type cmd and clikc OK Then type ipconfig, and there will be written Gateway on one of the lines. -NDR
its normally on the back or on the side of your computer or laptop or it will be in my computer under start menu.