Address Translation

The PIX firewall creates IP address-to-IP address mappings of traffic flowing through the firewall. Typically, the inside interface uses private addressing (RFC 1918) that cannot be used on the Internet. So, as the traffic is funneled out of the outside interface, NAT or PAT translation occurs. NAT replaces the source's private address with an available global public address on the outside interface, allowing traffic to travel on the public network while hiding the real (private) user IP address.

CSPFA Exam Cram 2 (Exam 642-521)
CCSP CSPFA Exam Cram 2 (Exam Cram 642-521)
ISBN: 0789730235
EAN: 2147483647
Year: 2003
Pages: 218 © 2008-2017.
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