Multiple IP

We're using SBS Server 2003 and moving to a new ISP soon. We have a SBS
specialist coming in to make the changes and he recommended having multiple
ip's, (1 each for SMTP,VPN,HTTP etc).
The ISP has assigned up 13 usable IP's, and I'm confused about how this works.

We have a router and a firewall and my question is how do the multiple Ip's
work via the router and firewall? Is it that ip routes are added to the
router hence directing all traffic to the different Ip to the firewall and
from their to the host machine? An article or suggestion of how this is done
would be handy. Thanks

Your firewall needs to be able to do proxy arp for those static public IP´s
from your ISP.

So first you proxy arp the IP´s you want and then you need to do NAT and
route those into corresponding static black IP´s on your DMZ or LAN behind
the firewall.

Ofcourse you will also need to supply a suitable rulebase for those IP´s.

--
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Johan Engdahl
CCSA, CCSE, CCA, MCP | johan AT firewall1 DOT nu | http://www.firewall1.nu

"CK" <(E-Mail Removed)> wrote in message
news:4DC87984-62D2-4386-877B-(E-Mail Removed)...
> We're using SBS Server 2003 and moving to a new ISP soon. We have a SBS
> specialist coming in to make the changes and he recommended having
> multiple
> ip's, (1 each for SMTP,VPN,HTTP etc).
> The ISP has assigned up 13 usable IP's, and I'm confused about how this
> works.
>
> We have a router and a firewall and my question is how do the multiple
> Ip's
> work via the router and firewall? Is it that ip routes are added to the
> router hence directing all traffic to the different Ip to the firewall and
> from their to the host machine? An article or suggestion of how this is
> done
> would be handy. Thanks
>

"CK" <(E-Mail Removed)> wrote in message
news:4DC87984-62D2-4386-877B-(E-Mail Removed)...
> We're using SBS Server 2003 and moving to a new ISP soon. We have a SBS
> specialist coming in to make the changes and he recommended having multiple
> ip's, (1 each for SMTP,VPN,HTTP etc).

There are ways to use multiple IP#s,...but "can",...and "should" are 2 different
things. Typically it is better to use as few as possible and to do as much with
each one as possible since they are in short supply.

> The ISP has assigned up 13 usable IP's, and I'm confused about how this works.

Depends on the type of Line technology you have.

> We have a router and a firewall and my question is how do the multiple Ip's
> work via the router and firewall?

Depends on if this router is a "real" router, or if it is just a NAT box.

The Firewall?,....that depends on the topology design of all this,...how things
are positioned relative to each other,...how it is physically cabled up. Just
knowing that there is an SBS box, a Firewall of some kind, a "router" of some
kind, a handful of IP#s, and an unknown line technology doesn't give enough to
make any determination.

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

The views expressed (as annoying as they are, and as stupid as they sound), are
my own and not those of my employer, or Microsoft, or anyone else associated
with me, including my cats.
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