Cisco Systems 2.5 Translation Timeouts, Network Address Translation Rules

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Cisco Router and Security Device Manager 2.5 User’s Guide
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Chapter26 Network Addres s Translation
Network Address Translation Rules
Translation Timeouts
When dynamic NAT is configured, translation entries have a timeout period after
which they expire and are purged from the translation table. Click this button to
configure the timeout values for NAT translation entries and other values.
Network Address Translation Rules
This area shows the designated inside and outside interfaces and the NAT rules
that have been configured.
Inside Interfaces
The inside interfaces are the interfaces that connect to the private networks the
router serves. NAT uses the inside designation when interpreting a NAT
translation rule. You can designate interfaces as inside by clicking Designate
NAT interfaces.
Outside Interfaces
The outside interfaces are the router interfaces that conne ct to the WAN or the
Internet. NAT uses the outside designation when interpreting a NAT translation
rule. You can designate interfaces as outside by clicking Designate NAT
interfaces.
Original Address
This is the private address or set of addresses that is used on the LAN.
Translated Address
This is the legal address or range of addresses that is used on the Internet or the
external network.
Rule Type
Rules are either static address translation rules or dynamic address translation
rules.
Static address translation allows hosts with private addresses to access the
Internet and to be publicly accessible from the Internet. It statically maps one
private IP address to one public or global address. If you wanted to provide static
translation to ten private addresses, you would create a separate static rule for
each address.