internet access

there is a company that is subleasing their space and internet access. however, they need to have their own serparate network. how do i go about accomplishing this. currently they are using their lan until i get them setup on their own network
ttrbrtsnAsked:
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Brian PringleConnect With a Mentor Systems Analyst II, SCM, ERPCommented:
Yes!  That is what I did.  Just make sure that their router and your router are using different network IP address ranges.  If you buy a consumer router, it will come pre-configured as 192.168.1.1 or 192.168.2.1 (or something similar in the third octet).  You will need to make sure that your network ID and theirs are different.
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InfamusCommented:
How is their network setup currently and what kind of network devices do they have? (switches, routers, firewalls...etc.)
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Craig SharpLead Enginneer - Unix Server TeamCommented:
If I understand your question, you are wanting to attach them to your main network and provide them with Internet and office networking so they dont need their own system.  Is that correct?
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ttrbrtsnAuthor Commented:
the opposite. i need to break off of their network. if they connect me to their lan switch, do i need just a router or wireless router ? or do i just need a firewall ? i need to be off of their network ?
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ttrbrtsnAuthor Commented:
im sorry, i meant, i need to have our own network while piggy back of their internet access
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InfamusCommented:
If you are piggy backing on their network, it is them who control the access, not you.

The solution can be difference based on what type of network devices they have.
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ttrbrtsnAuthor Commented:
what is going to give out DHCP to my 5 workstations, firewall ?
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Brian PringleSystems Analyst II, SCM, ERPCommented:
This will involve three routers.  One would connect to the Internet connection.  Then, two more routers plug in to the LAN ports on that router.  That would allow you to share the connection with two routers while isolating the workstations on each network.

See the attached file.

I do this for a coffee shop next door to our office.  I have a router and firewall setup.  Then, their network has their own router, as does mine.  Each network has its own network address.

External:  66.xxx.xxx.xxx
Mine:  192.168.10.x
Theirs:  192.168.20.x
Router-Setup.png
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Brian PringleSystems Analyst II, SCM, ERPCommented:
Essentially, you just need to plug your own router's WAN port into their network connection and enable DHCP.  That gives your network Internet access.  But, if you and they both want to be isolated, then you need to do what I listed above.
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ttrbrtsnAuthor Commented:
L for LAN and
W for WAn

is this how i would set it up ?
Capture.JPG
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David Johnson, CD, MVPOwnerCommented:
easiest way is 3 routers

WAN -> router --> router2 --- company1
                          -->router3 --- compaany2
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