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Cisco ASA Series Firewall CLI Configuration Guide
Chapter 10 NAT Examples and Reference
NAT for VPN
object network vpn_local
subnet 10.3.3.0 255.255.255.0
nat (outside,outside) dynamic interface
! Identify inside Boulder network, & perform object interface PAT when going to Internet:
object network boulder_inside
subnet 10.1.1.0 255.255.255.0
nat (inside,outside) dynamic interface
! Identify inside San Jose network for use in twice NAT rule:
object network sanjose_inside
subnet 10.2.2.0 255.255.255.0
! Use twice NAT to pass traffic between the Boulder network and the VPN client without
! address translation (identity NAT):
nat (inside,outside) source static boulder_inside boulder_inside destination static
vpn_local vpn_local
! Use twice NAT to pass traffic between the Boulder network and San Jose without
! address translation (identity NAT):
nat (inside,outside) source static boulder_inside boulder_inside destination static
sanjose_inside sanjose_inside
! Use twice NAT to pass traffic between the VPN client and San Jose without
! address translation (identity NAT):
nat (outside,outside) source static vpn_local vpn_local destination static sanjose_inside
sanjose_inside
See the following sample NAT configuration for ASA2 (San Jose):
! Identify inside San Jose network, & perform object interface PAT when going to Internet:
object network sanjose_inside
subnet 10.2.2.0 255.255.255.0
nat (inside,outside) dynamic interface
! Identify inside Boulder network for use in twice NAT rule:
object network boulder_inside
subnet 10.1.1.0 255.255.255.0
! Identify local VPN network for use in twice NAT rule:
object network vpn_local
subnet 10.3.3.0 255.255.255.0
! Use twice NAT to pass traffic between the San Jose network and Boulder without
! address translation (identity NAT):
nat (inside,outside) source static sanjose_inside sanjose_inside destination static
boulder_inside boulder_inside
! Use twice NAT to pass traffic between the San Jose network and the VPN client without
! address translation (identity NAT):
nat (inside,outside) source static sanjose_inside sanjose_inside destination static
vpn_local vpn_local
NAT and VPN Management Access
When using VPN, you can allow management access to an interface other than the one from which you
entered the ASA (see the management-access command). For example, if you enter the ASA from the
outside interface, the management-access feature lets you connect to the inside interface using ASDM,
SSH, Telnet, or SNMP; or you can ping the inside interface.
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