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What is an alternative configuration if proxy ARP cannot be used on your Security Gateway?

You want to implement Static Destination NAT in order to provide external, Internet users access
to an internal Web Server that has a reserved (RFC 1918) IP address. You have an unused valid
IP address on the network between your Security Gateway and ISP router. You control the router
that sits between the firewall external interface and the Internet.
What is an alternative configuration if proxy ARP cannot be used on your Security Gateway?

Which of the following configurations will allow this network to access the Internet?

Your main internal network 10.10.10.0/24 allows all traffic to the Internet using Hide NAT. You also
have a small network 10.10.20.0/24 behind the internal router. You want to configure the kernel to
translate the source address only when network 10.10.20.0 tries to access the Internet for HTTP,
SMTP, and FTP services. Which of the following configurations will allow this network to access
the Internet?


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