Public IP pass through...

[americanmcneil]

This may see kind of basic to some but here is my situation.

I have a client in my building who uses us for internet access. The are installing a new Cisco VPN controller/router. I need to route their public IP through my router as a pass through. Normally I NAT everything but their IT guy says they now need a straight pass through.

So if their public (static) IP was 111.222.333.444/24 for example, what would the route command be to let it go straight through out to the net?

Scott "Thrown to the Wolves" McNeil

http://www.epproach.net

 

[plshlpme]

do you have a bgp connection to your isp?
because youll need to announce or advertise that network to your upstream provider...

but basically youll need to make sure anything sourced off of their subnet is not allowed to go through your nat statements.

it will then be routed or "passed through"
assuming your isp populates the origin of their route and you put the correct static route on your router the traffic should be able to return correctly.

 

[americanmcneil]

The public IP in question is one that our providers (Deltacom) has given us. So I have given my clients one of my public IPs

Scott "Thrown to the Wolves" McNeil

http://www.epproach.net

 

[plshlpme]

so is you going to plug a patch cable between his router and one of your lan switches?

how big is your ip block?
and what do you have assigned to your wan interface? (mask)

 

[americanmcneil]

It is going from his router to a patch panel, to my core switch then to my core router then out to the internet

Scott "Thrown to the Wolves" McNeil

http://www.epproach.net

 

[plshlpme]

so do you have an interface in the same subnet as him or wil you have to route it over your lan?