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SteveWa

External


Since: May 12, 2006
Posts: 2



(Msg. 1) Posted: Fri May 12, 2006 1:24 pm
Post subject: how to share internet among offices but keep security intact?
Archived from groups: comp>sys>ibm>pc>hardware>networking (more info?)

i have a bldg that will have 3 different companies in 3 different
offices within one bldg.

can we use 1 dsl modem to share an internet connection amongst these
offices?

how do i separate the networks, so one office cannot be on the same
internal networks as the others, but they will all have the same
gateway through the dsl modem?

is this possible using a ruoter, and what features of the router should
I look for?

thanks

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Bob Willard

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Since: Feb 08, 2005
Posts: 66



(Msg. 2) Posted: Sat May 13, 2006 1:24 pm
Post subject: Re: how to share internet among offices but keep security intact? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

SteveWa DeleteThis @wwwplanet.net wrote:

> i have a bldg that will have 3 different companies in 3 different
> offices within one bldg.
>
> can we use 1 dsl modem to share an internet connection amongst these
> offices?
>
> how do i separate the networks, so one office cannot be on the same
> internal networks as the others, but they will all have the same
> gateway through the dsl modem?
>
> is this possible using a ruoter, and what features of the router should
> I look for?
>
> thanks
>
I suggest a router tree, consisting of a primary router with the DSL modem
on its WAN port; then, use one secondary router per company with its WAN
port cabled into a LAN port on the primary router.

--
Cheers, Bob

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SteveWa

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Since: May 12, 2006
Posts: 2



(Msg. 3) Posted: Mon May 15, 2006 12:11 pm
Post subject: Re: how to share internet among offices but keep security intact? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

and then what? can you explain how you would setup different networks
to prevent the traffic on the main router from "seeing" the other
traffic on the secondary router? if i used different subnet values ie.
10.0.0.1 versus 192.168.1.1 to separate the networks, would that work?
can I do that, and still tell each pc on ech network to use the ip of
the dsl modem as it's gateway, or not, beacuse i am thinking the
gateway value must be inside subnet values, i.e. can't use 10.0.0.1 as
the gateway if your subnet is 192.168... or can you do some tricky
mapping inside the router to make it associate 10.0.0.1 to the value of
192.168.1.1 for the dsl moedm on the main router?
 >> Stay informed about: how to share internet among offices but keep security inta.. 
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Yousuf Khan

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Since: Dec 17, 2005
Posts: 143



(Msg. 4) Posted: Tue May 16, 2006 5:42 am
Post subject: Re: how to share internet among offices but keep security intact? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

SteveWa.RemoveThis@wwwplanet.net wrote:
> and then what? can you explain how you would setup different networks
> to prevent the traffic on the main router from "seeing" the other
> traffic on the secondary router? if i used different subnet values ie.
> 10.0.0.1 versus 192.168.1.1 to separate the networks, would that work?
> can I do that, and still tell each pc on ech network to use the ip of
> the dsl modem as it's gateway, or not, beacuse i am thinking the
> gateway value must be inside subnet values, i.e. can't use 10.0.0.1 as
> the gateway if your subnet is 192.168... or can you do some tricky
> mapping inside the router to make it associate 10.0.0.1 to the value of
> 192.168.1.1 for the dsl moedm on the main router?
>


You would make the LAN port of the primary router, 192.168.0.x, while
all secondary routers would have LAN ports of 192.168.1.x.

If you want to get creative, then you can make the LAN port of the first
office 192.168.1.x, the second office 192.168.2.x, etc. But this is not
necessary, but you can do it, to keep the network topology clear and
distinct in your own head if you will need to service these routers for
these offices afterwards.

I would also suggest getting a non-wireless router for your primary
router, as you would not want anyone in any of the offices to be able to
directly connect to your primary router via a laptop wireless feature.
Similarly, if you're going to be enabling wireless access via the
secondary routers, then make sure they are all secured separately via
different WEP or WPA passwords, and make sure that each router
broadcasts a different SSID name so people aren't confused about which
office network they are connecting to.

Yousuf Khan
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Bob Willard

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Since: Feb 08, 2005
Posts: 66



(Msg. 5) Posted: Tue May 16, 2006 8:06 am
Post subject: Re: how to share internet among offices but keep security intact? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Yousuf Khan wrote:
> SteveWa.DeleteThis@wwwplanet.net wrote:
>
>> and then what? can you explain how you would setup different networks
>> to prevent the traffic on the main router from "seeing" the other
>> traffic on the secondary router? if i used different subnet values ie.
>> 10.0.0.1 versus 192.168.1.1 to separate the networks, would that work?
>> can I do that, and still tell each pc on ech network to use the ip of
>> the dsl modem as it's gateway, or not, beacuse i am thinking the
>> gateway value must be inside subnet values, i.e. can't use 10.0.0.1 as
>> the gateway if your subnet is 192.168... or can you do some tricky
>> mapping inside the router to make it associate 10.0.0.1 to the value of
>> 192.168.1.1 for the dsl moedm on the main router?
>>
>
>
> You would make the LAN port of the primary router, 192.168.0.x, while
> all secondary routers would have LAN ports of 192.168.1.x.
>
> If you want to get creative, then you can make the LAN port of the first
> office 192.168.1.x, the second office 192.168.2.x, etc. But this is not
> necessary, but you can do it, to keep the network topology clear and
> distinct in your own head if you will need to service these routers for
> these offices afterwards.
>
> I would also suggest getting a non-wireless router for your primary
> router, as you would not want anyone in any of the offices to be able to
> directly connect to your primary router via a laptop wireless feature.
> Similarly, if you're going to be enabling wireless access via the
> secondary routers, then make sure they are all secured separately via
> different WEP or WPA passwords, and make sure that each router
> broadcasts a different SSID name so people aren't confused about which
> office network they are connecting to.
>
> Yousuf Khan

Yep. I concur.
--
Cheers, Bob
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