Ipsec Vpn Pre Shared Key Generator

Posted on  by

IPsec Pre-Shared Key Generator. PSK Generator provides a secure process to negotiate a 64-byte IPsec Pre-Shared Key (also known as a Shared Secret or PSK) through insecure means, such as email. Note: This page uses client side javascript. It does not transmit any entered or calculated information. Learn more about this PSK Generator. Jul 14, 2016  Site to Site VPN Configuration with Pre Shared Key. For more details about VPN and its configuration check out these free resources: http://www.imedita.com/b.

Contents

Introduction

IPSEC preshared key recovery Have a site where there was no documentation for the IPSEC vpn and the cloud provider on the other end does not have the IPSEC preshared key. Chapter 11 IPsec VPN for FortiOS 5.0: Auto Key phase 1 parameters: Authenticating remote peers and clients: Enabling VPN access with user accounts and pre-shared keys. Follow this procedure to add a unique pre-shared key to an existing FortiClient configuration.

Cisco IOS® Software Release 12.3(2)T code introduces the functionality that allows the router to encrypt the ISAKMP pre-shared key in secure type 6 format in nonvolatile RAM (NVRAM). The pre-shared key to be encrypted can be configured either as standard, under an ISAKMP key ring, in aggressive mode, or as the group password under an EzVPN server or client setup. This sample configuration details how to set up encryption of both existing and new pre-shared keys.

Prerequisites

Requirements

There are no specific requirements for this document.

Components Used

The information in this document is based on this software version:

  • Cisco IOS Software Release 12.3(2)T

Ipsec Vpn Pre Shared Key Generator Download

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.

Conventions

Refer to the Cisco Technical Tips Conventions for more information on document conventions.

Configure

This section presents you with the information you can use to configure the features this document describes.

Note: Use the Command Lookup Tool (registered customers only) to obtain more information on the commands used in this section.

These two new commands are introduced in order to enable pre-shared key encryption:

  • key config-key password-encryption [master key]

  • password encryption aes

The [master key] is the password/key used to encrypt all other keys in the router configuration with the use of an Advance Encryption Standard (AES) symmetric cipher. The master key is not stored in the router configuration and cannot be seen or obtained in any way while connected to the router.

Once configured, the master key is used to encrypt any existing or new keys in the router configuration. If the [master key] is not specified on the command line, the router prompts the user to enter the key and to re-enter it for verification. If a key already exists, the user is prompted to enter the old key first. Keys are not encrypted until you issue the password encryption aes command.

The master key can be changed (although this should not be necessary unless the key has become compromised in some way) by issuing the key config-key.. command again with the new [master-key]. Any existing encrypted keys in the router configuration are re-encrypted with the new key.

You can delete the master key when you issue the no key config-key... However, this renders all currently configured keys in the router configuration useless (a warning message displays that details this and confirms the master key deletion). Since the master key no longer exists, the type 6 passwords cannot be unencrypted and used by the router.

Note: For security reasons, neither the removal of the master key, nor the removal of the password encryption aes command unencrypts the passwords in the router configuration. Once passwords are encrypted, they are not unencrypted. Existing encrypted keys in the configuration are still able to be unencrypted provided the master key is not removed.

Ipsec Vpn Pre Shared Key Generator

Additionally, in order to see debug-type messages of password encryption functions, use the password logging command in configuration mode.

Free

Configurations

This document uses these configurations on the router:

Encrypt the Existing Pre-shared Key
Add a New Master Key Interactively
Modify the Existing Master Key Interactively
Delete the Master Key

Verify

There is currently no verification procedure available for this configuration.

Troubleshoot

There is currently no specific troubleshooting information available for this configuration.

Related Information

Networks Training

One of the ways to configure authentication between two Cisco ASA firewalls having a site-to-site IPSec VPN tunnel between them is to configure a pre-shared key under the tunnel group attributes. This is actually the most common implementation of IPSEC lan-to-lan authentication that you will find in most real life networks.

The pre-shared key must be the same on both IPSEC VPN devices between which the secure tunnel is created. To configure the pre-shared key on a Cisco ASA:

Sep 23, 2019  Windows 7 Starter Product Key Generator Free Download Windows 7 Starter Product Key is entry-level Microsoft to fulfil the basic Computing requires for low specification devices, and it includes specific limitations as well. Starter

tunnel-group 1.1.1.1 type ipsec-l2l
tunnel-group 1.1.1.1 ipsec-attributes
pre-shared-key key123

Now, after configuring the pre-shared key, it is stored as encrypted hash on the ASA appliance and therefore when you view the running configuration (show run) you don’t see the actual clear text key anymore (i.e instead of “key123” you will see “*”).

Ciscoasa# show run

Ipsec Pre Shared Key

tunnel-group 1.1.1.1 type ipsec-l2l
tunnel-group 1.1.1.1 ipsec-attributes
pre-shared-key *

The problem arises when you forget the pre-shared key after a few months and you want to change one of the VPN tunnels. This situation happened to me recently when I had to change the public IP address on one of the ASA sites which had a Lan-to-Lan tunnel with a second ASA. Therefore I had to reconfigure the tunnel group and re-enter the old pre-shared key. However, I did not have it stored in clear text anywhere. The way to recover the pre-shared key is actually simple. Use the more system:running-config command. This command shows the pre-shared key in clear text format:

Vpn Preshared Key

MORE READING:Cisco ASA 5500-X Firewall Security Levels Explained

Ciscoasa# more system:running-config

….
….
tunnel-group 1.1.1.1 ipsec-attributes
pre-shared-key key123

Related Posts

  • Password Recovery for the Cisco ASA 5500 Firewall (5505,5510,5520 etc)
  • Cisco ASA 5505, 5510 Base Vs Security Plus License Explained
  • Cisco ASA 5500-X Firewall Security Levels Explained
  • How to Block HTTP DDoS Attack with Cisco ASA Firewall
  • How to Block Access to Websites with a Cisco ASA Firewall (with FQDN)