Internet Connection Sharing on Windows XP

This  trick  shows  you  how  to  share  your  internet  connections  on  multiple  computers  within  a  workgroup  with  Windows  XP.  Windows  XP  has  a  built-in  feature  that  called  "Internet  Connection  Sharing"  (ICS)  that  allows  home  users  to  share  their  internet  connections  on  multiple  computers.


If  you  are  not  familiar  with  the  network  configurations,  the  easiest  way  to  share  your  internet  connection  is  to  purchase  a  router  or  hub.  Use  this  trick  only  if  you  don't  have  a  router,  or  don't  want  to  use  a  router,  or  if  you  just  want  to  try  out  the  feature.

A  simple  way  to  understand  this  feature  is,  you  are  making  your  host  computer  (the  computer  directly  connects  to  the  internet)  functioning  as  a  router  for  other  computers.


What  do  you  need?

A  "Host"  computer  that  running  Windows  XP.  This  computer  must  have  at  least  TWO  (2)  network  adapters.  One  adapter  -  let's  call  it  "Adapter  #1"  -  connects  to  the  internet  and  another,  "Adapter  #2",  connects  to  a  hub  or  directly  to  other  computers.
Client  computer(s),  which  run  any  version  of  Windows.  A  client  computer  can  be  connected  to  the  host  computer  directly  by  a  cross-over  cable  or  indirectly  through  a  hub.
This  trick  assumes  that  the  host  computer  is  connected  to  the  internet  and  you  are  able  to  access  the  internet  on  this  computer.

Configure  the  Host  Computer

Logon  the  host  computer  as  Administrator.
Click  Start  >>  Control  Panel.
Click  Network  and  Internet  Connections.
Click  Network  Connections.
Right-click  the  connection  that  you  use  to  connect  to  the  internet  (the  connection  with  Adapter  #1).  This  connection  can  be  either  a  high-speed  internet  connection  or  a  dial-up  connection.
Click  Properties.
Click  Advanced  tab.
Under  Internet  Connection  Sharing,  select  the  Allow  other  network  users  to  connect  through  this  computer's  Internet  connection  check  box.
If  you  are  sharing  a  dial-up  Internet  connection,  select  the  Establish  a  dial-up  connection  whenever  a  computer  on  my  network  attempts  to  access  the  Internet  check  box  if  you  want  to  permit  your  computer  to  automatically  connect  to  the  Internet.
Click  OK.  You'll  reieve  the  following  message:
When  Internet  Connection  Sharing  is  enabled,  your  LAN  adapter  will  be  set  to  use  IP  address  192.168.0.1.  Your  computer  may  lose  connectivity  with  other  computers  on  your  network.  If  these  other  computers  have  static  IP  addresses,  it  is  a  good  idea  to  set  them  to  obtain  their  IP  addresses  automatically.  Are  you  sure  you  want  to  enable  Internet  Connection  Sharing?
Click  Yes.
Configure  the  Client  Computer(s)

To  use  the  shared  connection  from  the  Host  computer,  a  client  computer  must  be  configured  with  "Automatic  IP  address".  The  main  configurations  are:

Configure  TCP/IP  Automatic  IP
Configure  Internet  Connection
The  steps  for  the  above  two  configurations  are  vary  on  different  versions  of  Windows.
The  following  procedures  are  for  Windows  XP  client  computers.
Log  on  to  the  client  computer  as  Administrator  or  as  Owner.
Click  Start  >>  Control  Panel.
Click  Network  and  Internet  Connections.
Click  Network  Connections.
Right-click  Local  Area  Connection,  and  then  click  Properties.
Click  the  General  tab,  click  Internet  Protocol  (TCP/IP)  in  the  This  connection  uses  the  following  items  list,  and  then  click  Properties.
In  the  Internet  Protocol  (TCP/IP)  Properties  dialog  box,  click  Obtain  an  IP  address  automatically  (if  it  is  not  already  selected),  and  then  click  OK.


Click  Start  >>  Control  Panel
Click  Network  and  Internet  Connections.
Click  Internet  Options.
In  the  Internet  Properties  dialog  box,  click  the  Connections  tab.
Click  the  Setup  button.  The  New  Connection  Wizard  starts.
On  the  Welcome  to  the  New  Connection  Wizard  page,  click  Next.
Click  Connect  to  the  Internet,  and  then  click  Next.
Click  Set  up  my  connection  manually,  and  then  click  Next.
Click  Connect  using  a  broadband  connection  that  is  always  on,  and  then  click  Next.
On  the  Completing  the  New  Connection  Wizard  page,  click  Finish.
Exit  Control  Panel  and  test  the  internet.  You  might  need  to  restart  the  computer.

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