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Go Back   CPUG: The Check Point User Group > Check Point Firewall-1/VPN-1 And Related Products > NAT (Network Address Translation)
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Old 2006-10-05
Brentd Brentd is offline
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Default Clarify Static NAT on network object!

Hi all

I have tested this but I would like someone to clarify I have it right?

I had set a automatic static NAT on the local network object to test how computers IP addresses are translated outbound. This is what I found;

int_host 10.4.6.111/24
int_gateway 10.4.6.1/24
ext_gateway 172.26.106.1/16

I set static nat on the network obj (10.4.6.0) to be 172.26.0.0
When outbound from 10 -> 172, I found the last octet of the host was added to the last octet of the static NAT address to achieve a unique static NAT address to become 172.26.0.111 externally.

Is this normal?

Thanks for any help, I hope this helps someone else!
Brent
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Old 2006-10-05
stuartgreen stuartgreen is offline
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Default Re: Clarify Static NAT on network object!

think i get what you mean - if so then yes that is normal. If you static to a network range rather than a host it will map the address 1 to 1.

Eg

natting 10.1.1.0 >> 172.16.32.0 will give you...
10.1.1.1 >> 172.16.32.1
10.1.1.2 >> 172.16.32.2

and so on....
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Old 2006-10-06
Brentd Brentd is offline
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Default Re: Clarify Static NAT on network object!

You are correct, I was up for quite a few hours testing it!

Thanks
Brent
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