Split network

Hi,

My existsing network accessing internet via the only one gateway.

Is it possible to split the existsing networking into a few sub networks
(that can access the same gateway)?

Regards,
James

Hi,

Short answer would be no. Every network needs it's own gateway. Reason is
simple. Computers use gateway to talk to computers on other networks. If you
setup different networks e.g. 192.168.x.x with subnet mask 255.255.255.0.
Lets say you need 4 networks. You gateways would be in each network. IPs
would e.g. be.

192.168.0.1
192.168.1.1
192.168.2.1
192.168.3.1

If you would only have one gateway (e.g. IP 192.168.0.1) computers in
192.168.1.1 - 192.168.3.1 could not communicate with anything outside their
network -- even with gateway.

What you CAN do is use one server that has 5 network cards. 4 cards lead to
their networks (192.168.x.x) and the 5th card leads to Internet (or next
network).

I hope this helps,

Mike

"KS" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> Hi,
>
> My existsing network accessing internet via the only one gateway.
>
> Is it possible to split the existsing networking into a few sub networks
> (that can access the same gateway)?
>
> Regards,
> James
>
>

Hi Miha Pihler,

Your reply is useful.

Thanks a lot for your help.

Regards,
James

"Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
>
> Short answer would be no. Every network needs it's own gateway. Reason is
> simple. Computers use gateway to talk to computers on other networks. If
you
> setup different networks e.g. 192.168.x.x with subnet mask 255.255.255.0.
> Lets say you need 4 networks. You gateways would be in each network. IPs
> would e.g. be.
>
> 192.168.0.1
> 192.168.1.1
> 192.168.2.1
> 192.168.3.1
>
> If you would only have one gateway (e.g. IP 192.168.0.1) computers in
> 192.168.1.1 - 192.168.3.1 could not communicate with anything outside
their
> network -- even with gateway.
>
> What you CAN do is use one server that has 5 network cards. 4 cards lead
to
> their networks (192.168.x.x) and the 5th card leads to Internet (or next
> network).
>
> I hope this helps,
>
> Mike
>
> "KS" <(E-Mail Removed)> wrote in message
> news:%(E-Mail Removed)...
> > Hi,
> >
> > My existsing network accessing internet via the only one gateway.
> >
> > Is it possible to split the existsing networking into a few sub networks
> > (that can access the same gateway)?
> >
> > Regards,
> > James
> >
> >
>
>

Hi Miha Pihler,

So, is there any ways to do it instead of plugging a few more NIC into the
server (our server doesn't have so many slots)?

Can it be done by adding few routers?

Regards,
James


"Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
>
> Short answer would be no. Every network needs it's own gateway. Reason is
> simple. Computers use gateway to talk to computers on other networks. If
you
> setup different networks e.g. 192.168.x.x with subnet mask 255.255.255.0.
> Lets say you need 4 networks. You gateways would be in each network. IPs
> would e.g. be.
>
> 192.168.0.1
> 192.168.1.1
> 192.168.2.1
> 192.168.3.1
>
> If you would only have one gateway (e.g. IP 192.168.0.1) computers in
> 192.168.1.1 - 192.168.3.1 could not communicate with anything outside
their
> network -- even with gateway.
>
> What you CAN do is use one server that has 5 network cards. 4 cards lead
to
> their networks (192.168.x.x) and the 5th card leads to Internet (or next
> network).
>
> I hope this helps,
>
> Mike
>
> "KS" <(E-Mail Removed)> wrote in message
> news:%(E-Mail Removed)...
> > Hi,
> >
> > My existsing network accessing internet via the only one gateway.
> >
> > Is it possible to split the existsing networking into a few sub networks
> > (that can access the same gateway)?
> >
> > Regards,
> > James
> >
> >
>
>

Hi,

My suggestion would be to buy multipart card. This mean you take e.g. one
card (one slot) and you can connect 4 PCs to it. If you need more then 4 put
in another such card and you can plug in another 4 (altogether 8) PCs...

IntelR PRO/1000 MT Quad Port Server Adapter
http://support.intel.com/support/net...quad/index.htm

Mike

"KS" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi Miha Pihler,
>
> So, is there any ways to do it instead of plugging a few more NIC into the
> server (our server doesn't have so many slots)?
>
> Can it be done by adding few routers?
>
> Regards,
> James
>
>
> "Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Hi,
> >
> > Short answer would be no. Every network needs it's own gateway. Reason
is
> > simple. Computers use gateway to talk to computers on other networks. If
> you
> > setup different networks e.g. 192.168.x.x with subnet mask
255.255.255.0.
> > Lets say you need 4 networks. You gateways would be in each network. IPs
> > would e.g. be.
> >
> > 192.168.0.1
> > 192.168.1.1
> > 192.168.2.1
> > 192.168.3.1
> >
> > If you would only have one gateway (e.g. IP 192.168.0.1) computers in
> > 192.168.1.1 - 192.168.3.1 could not communicate with anything outside
> their
> > network -- even with gateway.
> >
> > What you CAN do is use one server that has 5 network cards. 4 cards lead
> to
> > their networks (192.168.x.x) and the 5th card leads to Internet (or next
> > network).
> >
> > I hope this helps,
> >
> > Mike
> >
> > "KS" <(E-Mail Removed)> wrote in message
> > news:%(E-Mail Removed)...
> > > Hi,
> > >
> > > My existsing network accessing internet via the only one gateway.
> > >
> > > Is it possible to split the existsing networking into a few sub
networks
> > > (that can access the same gateway)?
> > >
> > > Regards,
> > > James
> > >
> > >
> >
> >
>
>

Hi Miha Pihler,

That is great.

I have another question here.

How is it possible to restrict the machines to only work within their
subnets?
This is because I don't want to let them to access the other sub-networks by
changing their network setting.

BTW, thanks for your help.

Regards,
James.

"Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
>
> My suggestion would be to buy multipart card. This mean you take e.g. one
> card (one slot) and you can connect 4 PCs to it. If you need more then 4
put
> in another such card and you can plug in another 4 (altogether 8) PCs...
>
> IntelR PRO/1000 MT Quad Port Server Adapter
> http://support.intel.com/support/net...quad/index.htm
>
> Mike
>
> "KS" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Hi Miha Pihler,
> >
> > So, is there any ways to do it instead of plugging a few more NIC into
the
> > server (our server doesn't have so many slots)?
> >
> > Can it be done by adding few routers?
> >
> > Regards,
> > James
> >
> >
> > "Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > Hi,
> > >
> > > Short answer would be no. Every network needs it's own gateway. Reason
> is
> > > simple. Computers use gateway to talk to computers on other networks.
If
> > you
> > > setup different networks e.g. 192.168.x.x with subnet mask
> 255.255.255.0.
> > > Lets say you need 4 networks. You gateways would be in each network.
IPs
> > > would e.g. be.
> > >
> > > 192.168.0.1
> > > 192.168.1.1
> > > 192.168.2.1
> > > 192.168.3.1
> > >
> > > If you would only have one gateway (e.g. IP 192.168.0.1) computers in
> > > 192.168.1.1 - 192.168.3.1 could not communicate with anything outside
> > their
> > > network -- even with gateway.
> > >
> > > What you CAN do is use one server that has 5 network cards. 4 cards
lead
> > to
> > > their networks (192.168.x.x) and the 5th card leads to Internet (or
next
> > > network).
> > >
> > > I hope this helps,
> > >
> > > Mike
> > >
> > > "KS" <(E-Mail Removed)> wrote in message
> > > news:%(E-Mail Removed)...
> > > > Hi,
> > > >
> > > > My existsing network accessing internet via the only one gateway.
> > > >
> > > > Is it possible to split the existsing networking into a few sub
> networks
> > > > (that can access the same gateway)?
> > > >
> > > > Regards,
> > > > James
> > > >
> > > >
> > >
> > >
> >
> >
>
>

For this, you have few options. One is to prevent users from changing
settings. The other options (which is much better and much more secure) is
to have one switch one each subnet. If you have e.g. 4 subnets you have 4
switches. All users are connected to one of 4 switches and switch is
connected to gateway (router). Users in particular subnet is connected to
specific switch. The only way for user to switch his computer to other
network is to first change cables on switch (this should be a problem for
users since he/she is not suppose to have access to this equipment) and only
then change his/hers TCP/IP settings...

Mike

"KS" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi Miha Pihler,
>
> That is great.
>
> I have another question here.
>
> How is it possible to restrict the machines to only work within their
> subnets?
> This is because I don't want to let them to access the other sub-networks
by
> changing their network setting.
>
> BTW, thanks for your help.
>
> Regards,
> James.
>
> "Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Hi,
> >
> > My suggestion would be to buy multipart card. This mean you take e.g.
one
> > card (one slot) and you can connect 4 PCs to it. If you need more then 4
> put
> > in another such card and you can plug in another 4 (altogether 8) PCs...
> >
> > IntelR PRO/1000 MT Quad Port Server Adapter
> > http://support.intel.com/support/net...quad/index.htm
> >
> > Mike
> >
> > "KS" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > Hi Miha Pihler,
> > >
> > > So, is there any ways to do it instead of plugging a few more NIC into
> the
> > > server (our server doesn't have so many slots)?
> > >
> > > Can it be done by adding few routers?
> > >
> > > Regards,
> > > James
> > >
> > >
> > > "Miha Pihler" <mihap-(E-Mail Removed)> wrote in message
> > > news:(E-Mail Removed)...
> > > > Hi,
> > > >
> > > > Short answer would be no. Every network needs it's own gateway.
Reason
> > is
> > > > simple. Computers use gateway to talk to computers on other
networks.
> If
> > > you
> > > > setup different networks e.g. 192.168.x.x with subnet mask
> > 255.255.255.0.
> > > > Lets say you need 4 networks. You gateways would be in each network.
> IPs
> > > > would e.g. be.
> > > >
> > > > 192.168.0.1
> > > > 192.168.1.1
> > > > 192.168.2.1
> > > > 192.168.3.1
> > > >
> > > > If you would only have one gateway (e.g. IP 192.168.0.1) computers
in
> > > > 192.168.1.1 - 192.168.3.1 could not communicate with anything
outside
> > > their
> > > > network -- even with gateway.
> > > >
> > > > What you CAN do is use one server that has 5 network cards. 4 cards
> lead
> > > to
> > > > their networks (192.168.x.x) and the 5th card leads to Internet (or
> next
> > > > network).
> > > >
> > > > I hope this helps,
> > > >
> > > > Mike
> > > >
> > > > "KS" <(E-Mail Removed)> wrote in message
> > > > news:%(E-Mail Removed)...
> > > > > Hi,
> > > > >
> > > > > My existsing network accessing internet via the only one gateway.
> > > > >
> > > > > Is it possible to split the existsing networking into a few sub
> > networks
> > > > > (that can access the same gateway)?
> > > > >
> > > > > Regards,
> > > > > James
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

On Wed, 18 Aug 2004 14:39:27 +0800, "KS" <(E-Mail Removed)> wrote:

>My existsing network accessing internet via the only one gateway.
>
>Is it possible to split the existsing networking into a few sub networks
>(that can access the same gateway)?

Sure. Slightly more complicated but quite possible. Each net has a
default gateway that reaches the other nets and the router (you call
it a gateway) to the internet. Those default gateways will need
proper routing, but it works fine. You may wish to use routers as
those defaulkt gateways rather than computer systems.

Jeff