#Decrypt ike pre shared key how to
#Decrypt ike pre shared key software
#Decrypt ike pre shared key password

This output shows the script that is used to add a user profile in Cisco Secure ACS for UNIX. !- The user name is sent by the VPN Client !- look at the client configuration. This profile was created with UNIX, but a similar profile can be created on Cisco Secure ACS for Windows. Note: To find additional information on the commands used in this document, use the Command Lookup Tool ( registered customers only). This document uses the configurations shown below.

Conventionsįor more information on document conventions, refer to Cisco Technical Tips Conventions. If you are working in a live network, ensure that you understand the potential impact of any command before using it. All of the devices used in this document started with a cleared (default) configuration. The information presented in this document was created from devices in a specific lab environment.

#Decrypt ike pre shared key software

The information in this document is based on these software and hardware versions: You must have aggressive mode enabled on the VPN Client, and you must be running Cisco IOS Software Release 12.1.T or later on the router. However, a longer key length is a good idea. You must have aggressive mode enabled on the VPN Client to use this feature. The encryption algorithm in this example (see Step 2) is DES, so the pre-shared key must be at least 64 bits. This was introduced in Cisco IOS Software Release 12.1.T. There is no documentation available for this. The ID of the exchange is used as the user name to query AAA if no local key can be found on the Cisco IOS® router to which the user is trying to connect. I have to tried to input the pre-shared-key there but it does not take it. In the IKE shared secret feature that uses an AAA server, the shared secret is accessed during the aggressive mode of IKE negotiation through the AAA server. When using dynamic IP addressing such as Dynamic Host Configuration Protocol (DHCP) or Point-to-Point Protocol (PPP) dial-ups, the changing IP address can make key lookup difficult or impossible unless a wildcard pre-shared key is used. Pre-shared keys do not scale well when you deploy a large-scale VPN system without a certification authority (CA). The IKE shared secret feature that uses an authentication, authorization, and accounting (AAA) server enables key lookup from the AAA server.

#Decrypt ike pre shared key how to

Re-Enter the psk again at your end of the tunnel.Ģ.This document describes how to configure Internet Key Exchange (IKE) shared secret using a RADIUS server. Wrong PSK is the most common mistake when configuring new tunnel so my suggest in this case is:ġ. I believe Palo Alto TAC recommend this option only during t-shoot as it will cause traffic drop if your fw receive traffic that needs to be sent over the tunnel, but it is not established yet.

This will force your firewall to only act as receiver and never as initiator for this peer. So if you want to troubleshoot the tunnel at your end (on the Palo) you can 'enable passive mode' under the IKE Gateway -> Advance options.

You need to remember that the receiver of the tunnel negotiation will log the actual reason for negotiation failure.

If you have multiple tunnels configured on your firewall it is recommended to enable tunnel debug only for specific peer.

You can check here for commands that you can use for debug/troubleshooting.

PAN is actually my favorite vendor for IPsec troubleshooting as it has excellent document and easy to use tools/commands.

Palo Alto firewall provides you several ways to troubleshoot IPsec tunnel.

#Decrypt ike pre shared key password

Having the psk in plain-text for troubleshooting is like having your password written on sticky note on your monitor in case you forgot it. In addition, IKE implementations SHOULD support: 3DES for encryption. It is actually way better to do it this way rather have it in plain text just because you lack proper documentation. - MODP over default group number one (see below). Palo Alto is not the only vendor that does not store pre-shared key in plain text. Hey cannot agree with your statement - ' we have very limited options in Paloalto in terms of troubleshooting Tunnel down issues'