How to I change ICS default IP address 192.168.0.1?

[Stalin]

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

 

[Doug Sherman [MVP]]

No, and per RFC 1918 your ISP should not be giving you this address. See:

http://www.microsoft.com/resources/...2003/all/deployguide/en-us/dnsbb_tcp_zqfn.asp

It sounds like the provider is using NAT to give you Internet access. So,
try this:

1. On your 2 NIC machine, disable ICS.

2. Configure the LAN NIC with an address of 192.168.1.1.

3. Enable routing on this machine. Use regedit and navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Tcpip\Parameters

set the value for IPEnableRouter to 1.

4. Configure a networked computer with an IP address of 192.168.1.2. Give
it a default gateway of 192.168.1.1. Configure its primary DNS with the IP
address of your ISP's DNS server.

Depending on the ISP's NAT setup, the networked computer may now be able to
access the Internet.

Doug Sherman
MCSE Win2k/NT4.0, MCSA, MCP+I, MVP

 

[Nimit Mehta]

So what?? Once you enable ICS, manually change your LAN
address to 192.168.0.123
Your client machines will then have IP 192.168.0.124,125
and so on. Gateway 192.168.0.123, DNS 192.168.0.123.
I think your ISP is trying to save IPs and so giving you a
class C IP. ummm..
-Nimit

 

[Guest]

Thanks for the reply.
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001
\Services\Tcpip\Parameters - The value was set to 1 from
before.

========
When I try to share the internet connection I get the
following message -

An error occured while Internet connection sharing was
being enabled

Internet connection sharing cannot be enable.
A LAN connection is already configured with the IP address
that is required for automatic IP addressing

====================

The internet connection NIC is assigned an IP address of
192.168.0.70. When I try to activate ICS, ICS utility try
to assign the IP address 192.168.0.1 to the other NIC.
Since the same IP adress is used in both the NIC, I get
this error.

I want to know if there is a work around or I can change
the default IP address for ICS - meaning to use a new IP
address instead of 192.168.0.1

Thanks

Stalin

 

[Phillip Windell]

You can't have the same subnet on both side if and ICS connection. If the
ISP assigns 192.168.0.x then you cannot use the same subnet on the private
side.

If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service
http://support.microsoft.com/default.aspx?scid=kb;en-us;230148

 

[Phillip Windell]

If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service
http://support.microsoft.com/default.aspx?scid=kb;en-us;230148

 

[Nimit Mehta]

Yup, sorry missed that.
-Nimit

-----Original Message-----
If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service

http://support.microsoft.com/default.aspx?scid=kb;en-

us;230148

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

.

 

[Doug Sherman [MVP]]

OK, I didn't explain this very well. My point is that because the
'Internet' NIC has an address of 192.168.0.70, there is already NAT routing
somewhere on that network. Re-configuring ICS may work fine, but it places
you in a double NAT situation which frequently causes problems. Before
trying ICS, I would try straight routing through the Windows machine. Most
likely the provider's NAT router will perform address translation for
packets from a different subnet. If not, then try ICS.

Doug Sherman
MCSE Win2k/NT4.0, MCSA, MCP+I, MVP

If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service
http://support.microsoft.com/default.aspx?scid=kb;en-us;230148

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

 

[Phillip Windell]

Yea, if that is what they are doing. But usually when I have seen this the
ISP is only giving one address even though it is a Private address.
Essentially it is just the same as if they gave a single Public IP other
than it is private instead.
So you end up doing your own NAT on top of thiers so that there is sort of a
"back-to-back dmz" between your own segment the Internet with the private
segment that they have you on as the "dmz". This of course really hampers
flexability and isn't a very good service. I personally wouldn't want an
account with such an ISP but there are some doing things that way.


--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

OK, I didn't explain this very well. My point is that because the
'Internet' NIC has an address of 192.168.0.70, there is already NAT routing
somewhere on that network. Re-configuring ICS may work fine, but it places
you in a double NAT situation which frequently causes problems. Before
trying ICS, I would try straight routing through the Windows machine. Most
likely the provider's NAT router will perform address translation for
packets from a different subnet. If not, then try ICS.

Doug Sherman
MCSE Win2k/NT4.0, MCSA, MCP+I, MVP

If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service
http://support.microsoft.com/default.aspx?scid=kb;en-us;230148

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

 

[Doug Sherman [MVP]]

I agree - unless the provider works with you, there is no way to run a web
server or provide any other kind of access to Internet users with this
setup. Usually you see this in appartment complexes or office buildings
where Internet access is included as part of the lease. Straight routing
may not work if the provider's router doesn't have a static route to your
internal subnet. In that case, sometimes RIP will work if your computer
supports it, or you have to use NAT/ICS. If the Internet IP is dynamically
assigned, you may be able to simply connect a switch and get multiple IPs -
don't know what the contract says about that.

Doug Sherman
MCSE Win2k/NT4.0, MCSA, MCP+I, MVP

Yea, if that is what they are doing. But usually when I have seen this the
ISP is only giving one address even though it is a Private address.
Essentially it is just the same as if they gave a single Public IP other
than it is private instead.
So you end up doing your own NAT on top of thiers so that there is sort of a
"back-to-back dmz" between your own segment the Internet with the private
segment that they have you on as the "dmz". This of course really hampers
flexability and isn't a very good service. I personally wouldn't want an
account with such an ISP but there are some doing things that way.


--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

OK, I didn't explain this very well. My point is that because the
'Internet' NIC has an address of 192.168.0.70, there is already NAT routing
somewhere on that network. Re-configuring ICS may work fine, but it places
you in a double NAT situation which frequently causes problems. Before
trying ICS, I would try straight routing through the Windows machine. Most
likely the provider's NAT router will perform address translation for
packets from a different subnet. If not, then try ICS.

Doug Sherman
MCSE Win2k/NT4.0, MCSA, MCP+I, MVP

If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service
http://support.microsoft.com/default.aspx?scid=kb;en-us;230148

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

 

[Phillip Windell]

setup. Usually you see this in appartment complexes or office buildings

Yes, Apartment complexes and Hotels are probably the best example of what I
think thse ISPs are doing.

 

[Phillip Windell]

setup. Usually you see this in appartment complexes or office buildings

I think the OP is in a situation where it would be like setting up a
business LAN in a Hotel room.

 

[Guest]

230148 - How to Change the IP Range for the ICS DHCP
Service
http://support.microsoft.com/default.aspx?scid=kb;en-
us;230148

This solution applies to windows ME and windows 98 only.
Any other inputs?

-----Original Message-----
If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service

http://support.microsoft.com/default.aspx?scid=kb;en-

us;230148

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

.

 

[Phillip Windell]

Did you try it to see if it works even though Win98/ME may be the only ones
mentioned?

If it doesn't work, then there simply may not be a way to change it.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

230148 - How to Change the IP Range for the ICS DHCP
Service
http://support.microsoft.com/default.aspx?scid=kb;en-
us;230148

This solution applies to windows ME and windows 98 only.
Any other inputs?

-----Original Message-----
If the ISP side cannot be changed then ICS's default must be changed.

230148 - How to Change the IP Range for the ICS DHCP Service

http://support.microsoft.com/default.aspx?scid=kb;en-

us;230148

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com

I have a situation where the IP address provided by the
ISP is 192.168.0.x. While using this connection to
internet and I cannot share the internet connection as the
ICS also uses the same IP 192.168.0.1. Is there a way to
change the default ICS IP address for windows 2000 pro?

Thanks

Stalin

.

 

[Guest]

Your guess is right. I have two computers and I want to
share connection using hotel internet connection. They
charge me $15.00 for 24hrs usage and I am not sure why
they give me a private IP.

-----Original Message-----

setup. Usually you see this in appartment complexes or

office buildings

I think the OP is in a situation where it would be like setting up a
business LAN in a Hotel room.

--

Phillip Windell [MCP, MVP, CCNA]
www.wandtv.com


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