Site to Site NAT number, need a static mappings

I have a router NAT to access the internet, but also must NAT differently through a VPN tunnel. I know I could use a "pool" of addresses to pass through the tunnel and which worked well, but I really need "static" mapping addresses.

I took these lines:

overload of IP nat inside source list 110 interface Dialer1

VPN-pool pool IP nat 192.168.4.2 192.168.4.99 netmask 255.255.255.0

IP nat inside source tpi map route vpn-pool

who was assigning each of us an address from this pool when routing on the VPN tunnel and I replaced them with the following text:

overload of IP nat inside source list 110 interface Dialer1

IP nat inside source static 192.168.1.5 192.168.4.5 map route tpi

IP nat inside source static 192.168.1.6 192.168.4.6 map route tpi

IP nat inside source static 192.168.1.7 192.168.4.7 map route tpi

IP nat inside source static 192.168.1.8 192.168.4.8 map route tpi

I'm doing this for each address that is allowed access through the tunnel. Those who don't are mapped won't work.

But it turns out that these does not work for some reason any. Can someone tell me why? I can even do what I want?

Hello

Your access crypto-reading list

access-list 112 allow ip 192.168.4.0 0.0.0.255 10.50.200.0 0.0.0.255

access-list 112 allow ip 192.168.4.0 0.0.0.255 10.200.0.0 0.0.15.255

access-list 112 allow ip 192.168.4.0 0.0.0.255 10.53.0.0 0.0.255.255

The first entry of your road map looks like this

route allowed tpi 10 map

corresponds to the IP 110

and access-list 110 resembles

access-list 110 deny ip 192.168.1.0 0.0.0.255 10.50.200.0 0.0.0.255

access-list 110 deny ip 192.168.1.0 0.0.0.255 10.53.0.0 0.0.255.255

access-list 110 deny ip 192.168.1.0 0.0.0.255 10.200.0.0 0.0.15.255

access-list 110 permit ip 192.168.1.0 0.0.0.255 any

So what is happening is that traffic destined to one subnet to the other end of the VPN tunnel, for example 10.50.200.0 is not getting natted to 192.168.4.x because your access list 110 deny for this network. Deny in this context means only no NAT.

If the traffic is not natted to 192.168.4.x then it will not be sent through the VPN tunnel.

HTH

Jon

Tags: Cisco Security

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