I need some advice on NAT design. Here's the scenario.
This is my current scenario. I have my site at RTRA and a LAN there. At
RTRA, all the vendor connections come in through it as shown by Vendor_1 and
Vendor_2. Eventually, there will be Vendor_3, Vendor_4, etc.
S2
LAN_Switch----RTRA-------\
E1 \S1 \
\ Vendor_2
\
Vendor_1
What I want to do is provide NAT such that when Vendor_1, Vendor_2 and
eventually Vendor_3, Vendor_4 access stuff at RTRA, they will be using a NAT
address. I have three questions:
1. Can I configure NAT such that E1 is the "NAT Inside" interface and have
S1 and S2 both as "NAT Outside" interfaces and then of course the statics.
2. Should I have a switch hook up to E2 (not shown in drawing), then hook
Vendor_1, Vendor_2, Vendor_3, etc. hook up to the same VLAN on that switch
and have E2 configure as the only "NAT Outside" interface. That way, E2 is
the only "NAT Outside" interface, but all the Vendors that connect through
that switch will use the same NAT address.
3. Is this sort of NAT recommended to be configure on the core router where
all WAN connections come in or should I have another router that connects
directly to RTRA and then do that through there and use any of the questions
in 1 or 2 as the solution.
Basically, what is the best design for my scenario even if my
solution/question above is not right, any recommendations would be
appreciated. Thanks.
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