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Allow Access Internal IP Some Ports

I have a block of 5 "real" IP addresses that Comcast gave us.  I want to take one of those real IPs and translate it to an internal IP but only allow 4 TCP ports.

So:  Real IP:  77.88.99.111   should go to 192.168.10.5 only allow ports 20, 21, 2009, 23.

NSA- 240

Can someone tell me what I need to do?  (I know replying RTFM would be an idea, but I will not be accepting that as an answer, lol)

Thanks.
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dougp23
Asked:
dougp23
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1 Solution
 
MisbahCommented:
all this should be done on your firewall system .
no one can give you a detailed answer without knowing what kind of firewall you have.
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dougp23Author Commented:
Shoot I am sorry!  It's a SonicWall NSA-240.
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chris3453Commented:
From the manual page 57

To add the components of a One-to-One NAT policy, perform
the following steps:
1. Navigate to the Network > NAT Policies page. Click Add.
The Add NAT Policy dialog box displays.
2. For Original Source, select Any.
3. For Translated Source, select Original.
4. For Original Destination, select X0 IP.
5. For Translated Destination, select Create new address
object and create a new address object using WAN for
Zone Assignment and Host for Type.
6. For Original Service, select ports 20, 21, 2009, 23
7. For Translated Service, select Original.
8. For Inbound Interface, select LAN
9. For Outbound Interface, select WAN.
10. For Comment, enter a short description.
11. Select the Enable NAT Policy checkbox.
12. Select the Create a reflexive policy checkbox if you want
a matching NAT Policy to be automatically created in the
opposite direction. This will create the outbound as well as
the inbound policies.
13. Click Add.

I am assuming that you are looking to NAT a single internal address to a single external address. If this is not the case then you need to create a one-to-many NAT statement
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dougp23Author Commented:
Thanks.  It was more involved than that, but this got me going in the right direction!
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