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Static Nat on Cisco ASA 5505
I have an AT&T Business DSL account, I have the AT&T modem just doing bridging the Cisco ASA 5505 is doing the PPPoE authenication. We have that working with DHCP so I can hit the outside world. We have 5 static IP addresses and we need to pass one off to one of our internal boxes doing some kind of NAT'ing not sure why i can't assign static IP (example 146.221.14.235) and pass all traffic that comes in over the OUTSIDE interface to (example 10.10.25.4) IP address.
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by: Cyclops3590Posted on 2009-08-13 at 06:43:21ID: 25088095
you need effectively three items to do NAT/PAT and allow traffic
If you wish for do a NAT (one-to-one), it is like this:
static (inside,outside) 146.221.14.235 192.168.1.100 <-- Where 192.168.1.100 is the inside host
if you want to do a PAT (one-to-many; port forward only), then:
static (inside,outside) tcp 146.221.14.235 80 192.168.1.100 80 <-- Where 192.168.1.100 is the inside host and port 80/tcp is what you want to forward
then you need an acl to allow the traffic, i will assume you want to allow port 80
access-list outside-in permit tcp any host 146.221.14.235 eq http
then apply the acl to the outside interface
access-group outside-in in interface outside
finally since you made a modification to the translation table with the static entry you should run 'clear xlate' to refresh the translation table. you should now see the traffic being forwarded to your server.