Why l2tp with ipsec

Select the Enable Policy check box to enable the policy when it is saved. From the Encryption drop-down list, select one of the following encryption types:. From the Hash algorithm drop-down list, select one of the following hash types:. RSA is a cryptosystem for public-key encryption, and is widely used for securing sensitive data, particularly when being sent over an insecure network such as the Internet.

ECDSA is a cryptographic algorithm that supports the use of public or private key pairs for encrypting and decrypting information. Diffie-Hellman is a key agreement algorithm that allows two parties to agree upon a shared secret, and is used within IKE Internet Key Exchange.

FIPS refers to a set of standards that describe document processing, encryption algorithms, and other information technology standards for use within non-military government agencies, and by government contractors and vendors who work with these agencies.

In Lifetime , enter a value in the range of seconds to define the lifetime of the security association. The default value is seconds. Dynamic maps enable IPsec Internet Protocol security. SA Security Association. SA is the establishment of shared security attributes between two network entities to support secure communication. If you do not want to use this predefined map, you can use the procedures below to edit an existing map or create your own custom IPsec Internet Protocol security.

In Priority , enter a priority number for this map. Negotiation requests for security associations try to match the highest-priority map first. If that map does not match, the negotiation request continues down the list to the next-highest priority map until a match is made. In Name , enter a name for the dynamic map. Select the Dynamic map check box. PFS refers to the condition in which a current session key or long-term private key does not compromise the past or subsequent keys.

In the PFS group drop-down list, select one of the following groups:. To view current configuration settings for an IPsec Internet Protocol security. Enter a name for the transform in the Name field. In Lifetime seconds , enter a value in the range of seconds to define the lifetime of the security association for the dynamic peer. In Lifetime kilobytes , enter a value in kilobytes to define the lifetime of the security association for the dynamic peer.

Define the authentication method and server addresses:. Create address pools:. Netmask defines the class and range of IP addresses. Was this information helpful? Yes No. Sorry about that! How can we improve it? Send your comments and suggestions! All Files. You can start a new VPN connection by clicking the "Connect" button at any time.

On this instruction, every screen-shots are taken on iOS 6. Other versions of iOS are similar to be configured, however there might be minor different on UIs. These screen-shots are in English version of iOS. From the iOS main screen, start the "Settings" application. After you specify the "Server" field, you have to input "vpn" 3-letters to "Account" , "Password" and "Secret" fields.

After input, tap "Save". While VPN is established, you can see the status and connect time on the status screen. The "Connect to" IP address reports "1. On this instruction, every screen-shots are taken on Android 4. Other versions of Android 4. Some third-parties customizes the configuration screens of Android. These screen-shots are in English version Android iOS. Start the "Settings" application on Android.

A new VPN connection setting editing screen will appear. Input something string on the "Name" field e. Scroll down the configuration screen, and tap the "Show advanced options" checkbox if appropriate. Specify "vpn" 3-letters on the "IPSec pre-shared key" field. Specify "0. Make sure that you input the "Forwarding routes" field correctly.

If not, you cannot communicate via VPN. After all inputted, tap the "Save" button and save the VPN connection setting. Open the VPN connection settings list and tap a setting, you will see the following screen.

At the first time of using, you have to input "Username" and "Password" fields. Specify "vpn" 3-letters on both "Username" and "Password" fields, and check "Save account information".

After the VPN connection will be established, the indicate string "Connected" will be displayed next to the VPN connection setting, and the status indication area of Android will show "VPN activated" message.

Security-wise both are similar but it depends on the authentication method, the mode of authentication Main or Aggressive Mode , the strength of the keys, the used algorithms etc. The reason people use L2TP is due to the need to provide login mechanism to users. So vendors use L2TP to allow people to use their products in client-to-network scenario. You have to take in consideration two other modes; pre-shared-keys vs. Sign up to join this community. The best answers are voted up and rise to the top.

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