Cisco ASA 5500 Series Configuration Guide using the CLI, 8.4 and 8.6
Configuring Remote Access VPNs
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Configuring Remote Access IPsec VPNs

Table Of Contents

Configuring Remote Access IPsec VPNs

Information About Remote Access IPsec VPNs

Licensing Requirements for Remote Access IPsec VPNs

Guidelines and Limitations

Configuring Remote Access IPsec VPNs

Configuring Interfaces

Configuring ISAKMP Policy and Enabling ISAKMP on the Outside Interface

Configuring an Address Pool

Adding a User

Creating an IKEv1 Transform Set or IKEv2 Proposal

Defining a Tunnel Group

Creating a Dynamic Crypto Map

Creating a Crypto Map Entry to Use the Dynamic Crypto Map

Saving the Security Appliance Configuration

Configuration Examples for Remote Access IPsec VPNs

Feature History for Remote Access VPNs


Configuring Remote Access IPsec VPNs


This chapter describes how to configure Remote Access IPsec VPNs and includes the following sections:

Information About Remote Access IPsec VPNs

Licensing Requirements for Remote Access IPsec VPNs

Guidelines and Limitations

Configuring Remote Access IPsec VPNs

Configuration Examples for Remote Access IPsec VPNs

Feature History for Remote Access VPNs

Information About Remote Access IPsec VPNs

Remote access VPNs allow users to connect to a central site through a secure connection over a TCP/IP network such as the Internet. The Internet Security Association and Key Management Protocol, also called IKE, is the negotiation protocol that lets the IPsec client on the remote PC and the ASA agree on how to build an IPsec Security Association. Each ISAKMP negotiation is divided into two sections called Phase1 and Phase2.

Phase 1 creates the first tunnel to protect later ISAKMP negotiation messages. Phase 2 creates the tunnel that protects data travelling across the secure connection.

To set the terms of the ISAKMP negotiations, you create an ISAKMP policy. It includes the following:

An authentication method, to ensure the identity of the peers.

An encryption method, to protect the data and ensure privacy.

A Hashed Message Authentication Codes (HMAC) method to ensure the identity of the sender and to ensure that the message has not been modified in transit.

A Diffie-Hellman group to set the size of the encryption key.

A time limit for how long the ASA uses an encryption key before replacing it.

A transform set combines an encryption method and an authentication method. During the IPsec security association negotiation with ISAKMP, the peers agree to use a particular transform set to protect a particular data flow. The transform set must be the same for both peers.

A transform set protects the data flows for the access list specified in the associated crypto map entry. You can create transform sets in the ASA configuration, and then specify a maximum of 11 of them in a crypto map or dynamic crypto map entry. For more overview information, including a table that lists valid encryption and authentication methods, see the "Creating an IKEv1 Transform Set" section in Chapter 73 "Configuring LAN-to-LAN IPsec VPNs" of this guide.

Licensing Requirements for Remote Access IPsec VPNs

The following table shows the licensing requirements for this feature:


Note This feature is not available on No Payload Encryption models.


Model
License Requirement 1

ASA 5505

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license and Security Plus license: 2 sessions.

Optional permanent or time-based licenses: 10 or 25 sessions.

Shared licenses are not supported.2

AnyConnect Essentials license3 : 25 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 10 sessions.

Security Plus license: 25 sessions.

ASA 5510

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base and Security Plus license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, or 250 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 250 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license and Security Plus license: 250 sessions.

ASA 5520

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, or 750 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 750 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 750 sessions.

ASA 5540

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, or 2500 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 2500 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 2500 sessions.

ASA 5550

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, 2500, or 5000 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 5000 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 5000 sessions.

ASA 5580

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, 2500, 5000, or 10000 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 10000 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 10000 sessions.

ASA 5512-X

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, or 250 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 250 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 250 sessions.

ASA 5515-X

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, or 250 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 250 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 250 sessions.

ASA 5525-X

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, or 750 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 750 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 750 sessions.

ASA 5545-X

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, or 2500 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 2500 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 2500 sessions.

ASA 5555-X

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, 2500, or 5000 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 5000 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 5000 sessions.

ASA 5585-X with SSP-10

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, 2500, or 5000 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 5000 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 5000 sessions.

ASA 5585-X with SSP-20, -40, and -60

IPsec remote access VPN using IKEv2 (use one of the following):

AnyConnect Premium license:

Base license: 2 sessions.

Optional permanent or time-based licenses: 10, 25, 50, 100, 250, 500, 750, 1000, 2500, 5000, or 10000 sessions.

Optional Shared licenses2: Participant or Server. For the Server license, 500-50,000 in increments of 500 and 50,000-545,000 in increments of 1000.

AnyConnect Essentials license3: 10000 sessions.

IPsec remote access VPN using IKEv1 and IPsec site-to-site VPN using IKEv1 or IKEv2:

Base license: 10000 sessions.

1 The maximum combined VPN sessions of all types cannot exceed the maximum sessions shown in this table. For the ASA 5505, the maximum combined sessions is 10 for the Base license, and 25 for the Security Plus license.

2 A shared license lets the ASA act as a shared license server for multiple client ASAs. The shared license pool is large, but the maximum number of sessions used by each individual ASA cannot exceed the maximum number listed for permanent licenses.

3 The AnyConnect Essentials license enables AnyConnect VPN client access to the ASA. This license does not support browser-based SSL VPN access or Cisco Secure Desktop. For these features, activate an AnyConnect Premium license instead of the AnyConnect Essentials license.

Note: With the AnyConnect Essentials license, VPN users can use a Web browser to log in, and download and start (WebLaunch) the AnyConnect client.

The AnyConnect client software offers the same set of client features, whether it is enabled by this license or an AnyConnect Premium SSL VPN Edition license.

The AnyConnect Essentials license cannot be active at the same time as the following licenses on a given ASA: AnyConnect Premium license (all types) or the Advanced Endpoint Assessment license. You can, however, run AnyConnect Essentials and AnyConnect Premium licenses on different ASAs in the same network.

By default, the ASA uses the AnyConnect Essentials license, but you can disable it to use other licenses by using the Configuration > Remote Access VPN > Network (Client) Access > Advanced > AnyConnect Essentials pane.

For a detailed list of the features supported by the AnyConnect Essentials license and AnyConnect Premium license, see AnyConnect Secure Mobility Client Features, Licenses, and OSs:

http://www.cisco.com/en/US/products/ps10884/products_feature_guides_list.html


Guidelines and Limitations

This section includes the guidelines and limitations for this feature.

Context Mode Guidelines

Supported only in single context mode. Does not support multiple context mode.

Firewall Mode Guidelines

Supported only in routed firewall mode. Transparent mode is not supported.

Failover Guidelines

IPsec VPN sessions are replicated in Active/Standby failover configurations only. Active/Active failover configurations are not supported.

IPv6 Guidelines

Does not support IPv6.

Configuring Remote Access IPsec VPNs

This section describes how to configure remote access VPNs and includes the following topics:

Configuring Interfaces

Configuring ISAKMP Policy and Enabling ISAKMP on the Outside Interface

Configuring an Address Pool

Adding a User

Creating an IKEv1 Transform Set or IKEv2 Proposal

Defining a Tunnel Group

Creating a Dynamic Crypto Map

Creating a Crypto Map Entry to Use the Dynamic Crypto Map

Saving the Security Appliance Configuration

Configuring Interfaces

An ASA has at least two interfaces, referred to here as outside and inside. Typically, the outside interface is connected to the public Internet, while the inside interface is connected to a private network and is protected from public access.

To begin, configure and enable two interfaces on the ASA. Then assign a name, IP address and subnet mask. Optionally, configure its security level, speed and duplex operation on the security appliance.

To configure interfaces, perform the following steps, using the command syntax in the examples:

Detailed Steps

 
Command
Purpose

Step 1 

interface {interface}
 
        
Example:
hostname(config)# interface ethernet0
hostname(config-if)#

Enters interface configuration mode from global configuration mode.

Step 1 

ip address ip_address [mask] [standby 
ip_address]
 
        
Example:
hostname(config)# interface ethernet0
hostname(config-if)#
hostname(config-if)# ip address 
10.10.4.200 255.255.0.0

Sets the IP address and subnet mask for the interface.

Step 2 

nameif name
 
        
Example:
hostname(config-if)# nameif outside
hostname(config-if)#

Specifies a name for the interface (maximum of 48 characters). You cannot change this name after you set it.

Step 3 

shutdown
 
        
Example:
hostname(config-if)# no shutdown
hostname(config-if)#

Enables the interface. By default, interfaces are disabled.

Configuring ISAKMP Policy and Enabling ISAKMP on the Outside Interface

This section describes the procedure to configure an ISAKMP policy on the outside interface and how to enable the policy.

Detailed Steps

Perform the following steps and use the command syntax in the following examples as a guide.

 
Command
Purpose

Step 1 

crypto ikev1 policy priority 
authentication {crack | pre-share | 
rsa-sig}
 
        
Example:
hostname(config)# crypto ikev1 policy 1 
authentication pre-share
hostname(config)#

Specifies the authentication method and the set of parameters to use during IKEv1 negotiation.

Priority uniquely identifies the Internet Key Exchange (IKE) policy and assigns a priority to the policy. Use an integer from 1 to 65,534, with 1 being the highest priority and 65,534 the lowest.

In this example and the steps that follow, we set the priority to 1.

Step 2 

crypto ikev1 policy priority encryption 
{aes | aes-192 | aes-256 | des | 3des}
 
        
Example:
hostname(config)# crypto ikev1 policy 1 
encryption 3des
hostname(config)#

Specifies the encryption method to use within an IKE policy.

Step 3 

crypto ikev1 policy priority hash {md5 | 
sha}
 
        
Example:
hostname(config)# crypto ikev1 policy 1 
hash sha
hostname(config)#

Specifies the hash algorithm for an IKE policy (also called the HMAC variant).

Step 4 

crypto ikev1 policy priority group 
{1 | 2 | 5}
 
        
Example:
hostname(config)# crypto ikev1 policy 1 
group 2
hostname(config)#

Specifies the Diffie-Hellman group for the IKE policy—the crypto protocol that allows the IPsec client and the ASA to establish a shared secret key.

Step 5 

crypto ikev1 policy priority lifetime 
{seconds}
 
        
Example:
hostname(config)# crypto ikev1 policy 1 
lifetime 43200
hostname(config)#

Specifies the encryption key lifetime—the number of seconds each security association should exist before expiring.

The range for a finite lifetime is 120 to 2147483647 seconds.
Use 0 seconds for an infinite lifetime.

Step 6 

crypto ikev1 enable interface-name
 
        
Example:
hostname(config)# crypto ikev1 enable 
outside
hostname(config)#

Enables ISAKMP on the interface named outside.

Step 7 

write memory
 
        
Example:
hostname(config-if)# write memory
Building configuration...
Cryptochecksum: 0f80bf71 1623a231 63f27ccf 
8700ca6d
 
        
11679 bytes copied in 3.390 secs (3893 
bytes/sec)
[OK]
hostname(config-if)#

Saves the changes to the configuration.

Configuring an Address Pool

The ASA requires a method for assigning IP addresses to users. This section uses address pools as an example. Use the command syntax in the following examples as a guide.

Command
Purpose
ip local pool poolname 
first-addresslast-address [mask mask]
 
        
Example:
hostname(config)# ip local pool testpool 
192.168.0.10-192.168.0.15
hostname(config)#

Creates an address pool with a range of IP addresses, from which the ASA assigns addresses to the clients.

The address mask is optional. However, You must supply the mask value when the IP addresses assigned to VPN clients belong to a non-standard network and the data could be routed incorrectly if you use the default mask. A typical example is when the IP local pool contains 10.10.10.0/255.255.255.0 addresses, since this is a Class A network by default. This could cause routing issues when the VPN client needs to access different subnets within the 10 network over different interfaces.


Adding a User

This section shows how to configure usernames and passwords. Use the command syntax in the following examples as a guide.

Command
Purpose
username name {nopassword | password password 
[mschap | encrypted | nt-encrypted]}  
[privilege priv_level] 
 
        
Example:
hostname(config)# username testuser password 12345678
hostname(config)#

Creates a user, password, and privilege level.


Creating an IKEv1 Transform Set or IKEv2 Proposal

This section shows how to configure a transform set (IKEv1) or proposal (IKEv2), which combines an encryption method and an authentication method.

Use the command syntax in the following examples as a guide.

Command
Purpose

To configure an IKEv1 transform set:

crypto ipsec ikev1 transform-set 
transform-set-name encryption-method 
[authentication]
 
        
Example:
hostname(config)# crypto ipsec transform set 
FirstSet esp-3des esp-md5-hmac
hostname(config)#

Configures an IKEv1 transform set that specifies the IPsec IKEv1 encryption and hash algorithms to be used to ensure data integrity.

Use one of the following values for encryption:

esp-aes to use AES with a 128-bit key.

esp-aes-192 to use AES with a 192-bit key.

esp-aes-256 to use AES with a 256-bit key.

esp-des to use 56-bit DES-CBC.

esp-3des to use triple DES algorithm.

esp-null to not use encryption.

Use one of the following values for authentication:

esp-md5-hmac to use the MD5/HMAC-128 as the hash algorithm.

esp-sha-hmac to use the SHA/HMAC-160 as the hash algorithm.

esp-none to not use HMAC authentication.

To configure an IKEv2 proposal:

crypto ipsec ikev2 ipsec-proposal 
proposal_name 
 
        
Then:
protocol {esp} {encryption {des | 3des | aes 
| aes-192 | aes-256 | null} | integrity {md5 
| sha-1}
 
        
Example:
hostname(config)# crypto ipsec ikev2 
ipsec-proposal secure_proposal
hostname(config-ipsec-proposal)# protocol 
esp encryption des integrity md5

Configures an IKEv2 proposal set that specifies the IPsec IKEv2 protocol, encryption, and integrity algorithms to be used.

esp specifies the Encapsulating Security Payload (ESP) IPsec protocol (currently the only supported protocol for IPsec).

Use one of the following values for encryption:

des to use 56-bit DES-CBC encryption for ESP.

3des (default) to use the triple DES encryption algorithm for ESP.

aes to use AES with a 128-bit key encryption for ESP.

aes-192 to use AES with a 192-bit key encryption for ESP.

aes-256 to use AES with a 256-bit key encryption for ESP.

null to not use encryption for ESP.

Use one of the following values for integrity:

md5 specifies the md5 algorithm for the ESP integrity protection.

sha-1 (default) specifies the Secure Hash Algorithm (SHA) SHA-1, defined in the U.S. Federal Information Processing Standard (FIPS), for ESP integrity protection.


Defining a Tunnel Group

This section describes how to configure a tunnel group, which is a set of records that contain tunnel connection policies. You configure a tunnel group to identify AAA servers, specify connection parameters, and define a default group policy. The ASA stores tunnel groups internally.

There are two default tunnel groups in the ASA system: DefaultRAGroup, which is the default remote-access tunnel group, and DefaultL2Lgroup, which is the default LAN-to-LAN tunnel group. You can change them but not delete them. The ASA uses these groups to configure default tunnel parameters for remote access and LAN-to-LAN tunnel groups when there is no specific tunnel group identified during tunnel negotiation.

Use the command syntax in the following examples as a guide.

Detailed Steps

 
Command
Purpose

Step 1 

tunnel-group name type type
 
        
Example:
hostname(config)# tunnel-group testgroup 
type ipsec-ra
hostname(config)#

Creates an IPsec remote access tunnel-group (also called connection profile).

Step 2 

tunnel-group name general-attributes
 
        
Example:
hostname(config)# tunnel-group testgroup 
general-attributes
hostname(config-tunnel-general)# 

Enters tunnel group general attributes mode where you can enter an authentication method.

Step 3 

address-pool [(interface name)] 
address_pool1 [...address_pool6]
 
        
Example:
hostname(config-general)# address-pool 
testpool

Specifies an address pool to use for the tunnel group.

Step 4 

tunnel-group name ipsec-attributes
 
        
Example:
hostname(config)# tunnel-group testgroup 
ipsec-attributes
hostname(config-tunnel-ipsec)#

Enters tunnel group ipsec attributes mode where you can enter IPsec-specific attributes for IKEv1 connections.

Step 5 

ikev1 pre-shared-key key
 
        
Example:
hostname(config-tunnel-ipsec)# 
pre-shared-key 44kkaol59636jnfx
 
        

(Optional) Configures a pre-shared key (IKEv1 only). The key can be an alphanumeric string from 1-128 characters.

The keys for the adaptive security appliance and the client must be identical. If a Cisco VPN Client with a different preshared key size tries to connect, the client logs an error message indicating it failed to authenticate the peer.

Note Configure AAA authentication for IKEv2 using certificates in the tunnel group webvpn-attributes.

Creating a Dynamic Crypto Map

This section describes how to configure dynamic crypto maps, which define a policy template where all the parameters do not have to be configured. These dynamic crypto maps let the ASA receive connections from peers that have unknown IP addresses. Remote access clients fall in this category.

Dynamic crypto map entries identify the transform set for the connection. You also enable reverse routing, which lets the ASA learn routing information for connected clients, and advertise it via RIP or OSPF.

Use the command syntax in the following examples as a guide.

Detailed Steps

 
Command
Purpose

Step 1 

For IKEv1, use this command:

crypto dynamic-map dynamic-map-name 
seq-num set ikev1 transform-set 
transform-set-name
 
        
Example:
hostname(config)# crypto dynamic-map dyn1 
1 set ikev1 transform-set FirstSet
hostname(config)#
 
        

For IKEv2, use this command:

crypto dynamic-map dynamic-map-name 
seq-num set ikev2 ipsec-proposal 
proposal-name
 
        
Example:
hostname(config)# crypto dynamic-map dyn1 
1 set ikev2 ipsec-proposal FirstSet
hostname(config)#

Creates a dynamic crypto map and specifies an IKEv1 transform set or IKEv2 proposal for the map.

Step 2 

crypto dynamic-map dynamic-map-name 
dynamic-seq-num set reverse-route
 
        
Example:
hostname(config)# crypto dynamic-map dyn1 
1 set reverse route
hostname(config)#

(Optional) Enables Reverse Route Injection for any connection based on this crypto map entry.

Creating a Crypto Map Entry to Use the Dynamic Crypto Map

This section describes how to create a crypto map entry that lets the ASA use the dynamic crypto map to set the parameters of IPsec security associations.

In the following examples for this command, the name of the crypto map is mymap, the sequence number is 1, and the name of the dynamic crypto map is dyn1, which you created in the previous section, "Creating a Dynamic Crypto Map."

Use the command syntax in the following examples as a guide.

Detailed Steps

 
Command
Purpose

Step 1 

crypto map map-name seq-num ipsec-isakmp 
dynamic dynamic-map-name
 
        
Example:
hostname(config)# crypto map mymap 1 
ipsec-isakmp dynamic dyn1
hostname(config)#

Creates a crypto map entry that uses a dynamic crypto map.

Step 2 

crypto map map-name interface 
interface-name
 
        
Example:
hostname(config)# crypto map mymap 
interface outside
hostname(config)#

Applies the crypto map to the outside interface.

Saving the Security Appliance Configuration

After performing the preceding configuration tasks, be sure to save your configuration changes as shown in this example:

Command
Purpose
write memory
 
        
Example:
hostname(config-if)# write memory
Building configuration...
Cryptochecksum: 0f80bf71 1623a231 63f27ccf 8700ca6d
 
        
11679 bytes copied in 3.390 secs (3893 bytes/sec)
[OK]
hostname(config-if)#

Saves the changes to the configuration.


Configuration Examples for Remote Access IPsec VPNs

The following example shows how to configure a remote access IPsec/IKEv1 VPN:


hostname(config)# interface ethernet0
hostname(config-if)# ip address 10.10.4.200 255.255.0.0
hostname(config-if)# nameif outside
hostname(config-if)# no shutdown
hostname(config)# crypto ikev1 policy 1 
hostname(config-ikev1-policy)# authentication pre-share
hostname(config-ikev1-policy)# encryption 3des
hostname(config-ikev1-policy)# hash sha
hostname(config-ikev1-policy)# group 2
hostname(config-ikev1-policy)# lifetime 43200
hostname(config)# crypto ikev1 enable outside
hostname(config)# ip local pool testpool 192.168.0.10-192.168.0.15
hostname(config)# username testuser password 12345678
hostname(config)# crypto ipsec ikev1 transform-set FirstSet esp-3des esp-md5-hmac
hostname(config)# tunnel-group testgroup type remote-access
hostname(config)# tunnel-group testgroup general-attributes
hostname(config-general)# address-pool testpool
hostname(config)# tunnel-group testgroup ipsec-attributes
hostname(config-ipsec)# ikev1 pre-shared-key 44kkaol59636jnfx
hostname(config)# crypto dynamic-map dyn1 1 set ikev1 transform-set FirstSet
hostname(config)# crypto dynamic-map dyn1 1 set reverse-route
hostname(config)# crypto map mymap 1 ipsec-isakmp dynamic dyn1
hostname(config)# crypto map mymap interface outside
hostname(config)# write memory
 
   

The following example shows how to configure a remote access IPsec/IKEv2 VPN:


hostname(config)# interface ethernet0
hostname(config-if)# ip address 10.10.4.200 255.255.0.0
hostname(config-if)# nameif outside
hostname(config-if)# no shutdown
hostname(config)# crypto ikev2 policy 1 
hostname(config-ikev2-policy)# group 2
hostname(config-ikev2-policy)# integrity sha
hostname(config-ikev2-policy)# lifetime 43200
hostname(config-ikev2-policy)# prf sha
hostname(config)# crypto ikev2 outside
hostname(config)# ip local pool testpool 192.168.0.10-192.168.0.15
hostname(config)# username testuser password 12345678
hostname(config)# crypto ipsec ikev2 ipsec-proposal FirstSet 
hostname(config-ipsec-proposal)# protocol esp encryption 3des aes
hostname(config)# tunnel-group testgroup type remote-access
hostname(config)# tunnel-group testgroup general-attributes
hostname(config-general)# address-pool testpool
hostname(config)# tunnel-group testgroup webvpn-attributes
hostname(config-webvpn)# authentication aaa certificate
hostname(config)# crypto dynamic-map dyn1 1 set ikev2 ipsec-proposal FirstSet
hostname(config)# crypto dynamic-map dyn1 1 set reverse-route
hostname(config)# crypto map mymap 1 ipsec-isakmp dynamic dyn1
hostname(config)# crypto map mymap interface outside
hostname(config)# write memory
 
   

Feature History for Remote Access VPNs

Table 69-1 lists the release history for this feature.

Table 69-1 Feature History for Feature-1 

Feature Name
Releases
Feature Information

Remote access VPNs for IPsec IKEv1 and SSL.

7.0

Remote access VPNs allow users to connect to a central site through a secure connection over a TCP/IP network such as the Internet.

Remote access VPNs for IPsec IKEv2

8.4(1)

Added IPsec IKEv2 support for the AnyConnect Secure Mobility Client.