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Nat

kolawole1
Level 1
Level 1

While configuring easy vpn in nem mode with asa 5510 and a 1800 SERIES router,it has been said that intersting traffic should not be natted.How does this traffic goes to the internet with private ip addressing if the 2 sites are link by internet ?

What is this access list role?

access-group OUT in interface outside

example: See file attached

1 Accepted Solution

Accepted Solutions

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Kouferidji,

the scenario could describe the need to avoid to NAT traffic that has to go trough the IPSec tunnel:

LAN to LAN traffic has to travel inside ipsec packets and don't need to be natted

when accessing internet it has to be natted as you observe

access-list no-nat extended permit ip 10.10.10.0 255.255.255.0 192.168.10.0 255.255.255.0

net 192.168.10.0 is the lan behind the 871 see the drawing

Hope to help

Giuseppe

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1 Reply 1

Giuseppe Larosa
Hall of Fame
Hall of Fame

Hello Kouferidji,

the scenario could describe the need to avoid to NAT traffic that has to go trough the IPSec tunnel:

LAN to LAN traffic has to travel inside ipsec packets and don't need to be natted

when accessing internet it has to be natted as you observe

access-list no-nat extended permit ip 10.10.10.0 255.255.255.0 192.168.10.0 255.255.255.0

net 192.168.10.0 is the lan behind the 871 see the drawing

Hope to help

Giuseppe

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