NETSH (Win2k Resource Kit, standard command in XP)

Configure Interfaces, Routing protocols, Filters, Routes, Routing & remote access.

Syntax
      NETSH [-r router name] [-a AliasFile] [-c Context] [Command | -f ScriptFile]

Key
    context may be any of:
      DHCP, ip, ipx, netbeui, ras, routing,
      autodhcp, dnsproxy, igmp, mib, nat, ospf, relay, rip, wins.

      Under Windows XP the available contexts are:
      AAAA, DHCP, DIAG, IP, RAS, ROUTING, WINS

      To display a list of commands that can be used in a context, type the 
      context name followed by a space and a ? at the netsh> command prompt.
      e.g. 
      netsh> routing ? 

    command may be any of:

       /exec script_file_name 
                Load the script file and execute commands from it. 

       /offline 
                Set the current mode to offline. 
                changes made in this mode are saved, but require a "commit"
                or "online" command to be set in the router. 

       /online 
                Set the current mode to online. 
                Changes in this mode are immediately reflected in the router. 

       /commit  Commit any changes made in the offline mode to the router.

       /popd    Pop a context from the stack. 

       /pushd   Push current context onto the stack. 

       /set mode [mode =] online | offline 
                Set the current mode to online or offline. 

       /abort   Discard changes made in offline mode. 

       /add helper DLL_name 
                Install the helper .dll file in netsh.exe. 

       /delete helper .dll file name 
                Remove the helper .dll file from Netsh.exe. 

       /show alias   list all defined aliases. 
       /show helper  list all top-level helpers. 
       /show mode    show the current mode. 

       /alias   List all aliases.

       /alias [alias_name] 
                Display the string value of the alias. 

       /alias [alias_name] [string1] [string2 ...] 
                Set alias_name to the specified strings. 

       /unalias alias_name 
                Delete an alias.

       /dump - file name 
                Dump or append configuration to a text file. 

       /bye     Exit NETSH
       /exit    Exit NETSH
       /quit    Exit NETSH
       /h       Display help 
       /help    Display help 
       /?       Display help

Examples

Set LAN connection to DHCP
NETSH set address name="Local Area Connection" source=dhcp

Set LAN connection to the static IP address 192.168.5.99
NETSH set address name="MyLocal AreaConnection" source=static addr=192.168.5.99 mask=255.255.255.0 gateway=192.168.5.1

Show IP configuration
NETSH interface ip show config

Connect to port
NETSH diag connect iphost www.ss64.com 80

Export IP settings to file
NETSH -c interface dump > netsh.txt

Import IP settings from a file
NETSH -f netsh.txt

"Once you eliminate your #1 problem, #2 gets a promotion" - Gerald Weinberg, "The Secrets of Consulting"

Related commands:

Q242468 - How to Use the Netsh.exe Tool
Q257748 - Change from Static IP Address to DHCP with NETSH
Q140859 - Win NT TCP/IP Routing Basics
ROUTE - Manipulate network routing tables

Equivalent Linux BASH commands:

route -