# Cisco ASA Remote Access VPN

**URL:** <https://forum.networklessons.com/t/cisco-asa-remote-access-vpn/830>\
**Category:** Lessons Discussion\
**Created:** [December 19, 2016, 4:40pm UTC](https://forum.networklessons.com/t/cisco-asa-remote-access-vpn/830 "2016-12-19T16:40:34Z")\
**Posts on this page:** 1\
**Showing post:** 39

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**Author:** ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis)\
**Post date:** [April 9, 2020, 6:42am UTC](https://forum.networklessons.com/t/cisco-asa-remote-access-vpn/830/39 "2020-04-09T06:42:30Z")

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Hello Alberto

This is actually correct. This is what is called “Twice NAT” or “Identity NAT”. Take a look at the image of the network:

 ![image](https://cdn-forum.networklessons.com/uploads/default/original/2X/5/5f2f01414c5a06295faf91cb17c56bc38018c66e.png)  
The ASA has NATing enabled, so any traffic going from INSIDE to OUTSIDE, or visa versa, will be NATed.

The VPN client on the OUTSIDE network is on the 10.10.10.0/24 subnet. When it connects via VPN, its connection is tunneled over this subnet, and the internal IP address it is provided is in the 192.168.10.0/24 subnet, which is configured in the VPN\_POOL.

So the client sends encapsulated data to R1 over the tunnel. Outside IP header 10.10.10.0/24 subnet, inside IP header 192.168.10.0/24 subnet. Once it reaches the ASA outside interface, it is first decapsulated, so the 10.10.10.0/24 IP address is removed.

The result is an IP packet **with a source and destination IP in the 192.168.10.0/24 subnet** , and the packet is going in the OUTSIDE interface and exiting the INSIDE interface. Under normal circumstances, **this traffic would be NATed**. But we don’t want that, because the addresses are already the inside addresses we want. So we use this commands:

```
ASA1(config)# object network LAN  
ASA1(config-network-object)# subnet 192.168.1.0 255.255.255.0

ASA1(config)# object network VPN_POOL
ASA1(config-network-object)# subnet 192.168.10.0 255.255.255.0

ASA1(config)# nat (INSIDE,OUTSIDE) source static LAN LAN destination static VPN_POOL VPN_POOL

```

These commands simply state that any traffic that traverses the ASA with these IP addresses should not be translated. It essentially says: translate 192.168.1.0/24 to 192.168.1.0/24 and 192.168.10.0/24 to 192.168.10.0/24. This is why LAN and VPN\_POOL are stated twice in the comand.

I hope this has been helpful!

Laz

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