Simple NAT Problem

Hi experts,

This is going to be a simple NAT query but I can't seem to get my heard around the ASA/IOS NAT syntax (I'm a Cisco noob) so apologies in advance.

I have an ASA 5510 with two interfaces configured (outside addresses omitted):

Inside: 10.6.0.0/16
Outside_DSL: <outside address>/29

Basically I want to NAT inside traffic to the outside address. I thought the following command would do this:  

static (inside, outside_dsl) <outside_address> 10.6.0.0 netmask 255.255.0.0 0 0

I was wrong - I get an error "global address overlaps with mask".

I'm pretty sure this is relating to a gap in my Cisco knowledge so any help would be much appreciated.

Thanks


csuogAsked:
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csuogAuthor Commented:
Its suddenly dawned on me... do I actually need any NAT rules or do I just need to adjust my routing table to route traffic from the inside interface to the ouside_dsl interface?

I'm so confused! :-(
0
diepesCommented:
You do need nat, as i assume the adsl connects to the WWW, and the 10.x.x.x range is not valid on the internet.

Inside: 10.6.0.0/16
Outside_DSL: <outside address>/29

With Cisco it is better to mark all interfaces as either inside or outside.
interface FastEthernet0/0
      ip nat inside

interface DSL0
      ip nat outside

ip nat inside source static 10.65.0.110 152.109.79.170

ip nat inside source 10.6.0.0 255.255.0.0 overload interface DSL0
0

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