Pre shared keys used in IKE Phase 1

Similar Questions

• pre-shared key and shared secret

  Hello

  Pre-shared-key is only used for authentication of the peer or used in calculations of shared secret, too? Is there documentation that explains the whole process.

  Hello

  According to my notes, VPN, both are used to build a two-way VPN tunnel. IKEv1 is used to the old site-to-site IPsec VPN:

  IKEv1 Main mode (Phase 1) using three pairs of messages between peers (making six in total):

  * Pair 1 consists of IKEv1 configured on the device security policies: a peer (initiator) begins by sending one or more strategies IKEv1 and receiver pair answer (answering machine) with its political choices.

  * Pair 2 includes DH public key exchange: DH creates shared secret keys using agreed on DH group/algorithm exchanged pair 1 and crypt the nuncios (a randomly generated number) that begin their life as first a exchange between peers. They are then encrypted by the receiving peer and return to sender and decrypted using the generated keys.

  * Pair 3 is used for authentication ISAKMP: each peer is authenticated and their identity validated by either using pre-shared keys or digital certificates. These packages and all the others exchanged later during negotiations are encrypted and authenticated using shared and agreed by pair 2 policies.

• AnyConnect + possible PSK (pre-shared key) as under with cisco vpn client ikev1 and ikev2

  Is it possible to create a VPN Anyconnect of RA with just the name of user and password + pre-shared key (Group) for the connection, as could do for ikev1 with cisco VPN client? I am running 8.4.X ASA code and looks like tunnel-group commands have 8.2.X somewhat change. If you change the group type of the tunnel for remote access, now there is no option for IKEv2 PSK. This is only available when you choose the type

  Type of TG_TEST FW1 (config) # tunnel - group?

  set up the mode commands/options:
  Site IPSec IPSec-l2l group
  Remote access using IPSec-IPSec-ra (DEPRECATED) group
  remote access remote access (IPSec and WebVPN) group
  WebVPN WebVPN Group (DEPRECATED)

  FW1(config-tunnel-General) # tunnel - group TG_TEST ipsec-attributes
  FW1(config-tunnel-IPSec) #?

  configuration of the tunnel-group commands:
  any required authorization request users to allow successfully in order to
  Connect (DEPRECATED)
  Allow chain issuing of the certificate
  output attribute tunnel-group IPSec configuration
  mode
  help help for group orders of tunnel configuration
  IKEv1 configure IKEv1
  ISAKMP policy configure ISAKMP
  not to remove a pair of attribute value
  by the peer-id-validate Validate identity of the peer using the peer
  certificate
  negotiation to Enable password update in RADIUS RADIUS with expiry
  authentication (DEPRECATED)

  FW1(config-tunnel-IPSec) # ikev1?

  the tunnel-group-ipsec mode commands/options:
  pre-shared key associate a key shared in advance with the connection policy

  I'm getting old so I hope that it is not in another complaint curmudgeonly on the loss of functionality. :)

  Many small businesses do not want to invest in the PKI. It is usually a pain to deploy, backup, make redundant, etc..

  But it would be nice to have a bit more security on VPN other than just the connections of username and password.

  If this is not possible, it is possible to configure the Anyconnect customer to IKEv1 with PSK and name at the level of the Group client?

  If this is not possible, WTH did cisco end customer VPN cisco as a choice of VPN connection (other than to get more fresh mail of license)?

  I really hope that something like this exists still!

  THX,

  WR

  You are welcome

  In addition to two factors, you can also do double authentication (ie the two using the user name and password). Each set of credentials can come from a Bank of different identities.

  With this scheme, you can can configure a local user name (common) with password on the SAA (think of it as your analog PSK) and the other be the AD user identification information.

• Dial backup VPN - pre-shared key question

  I use dial backup for my DSL connections in case of failure, but on my host router I also use EZVPN Client VPN access server. Thus the server EZVPN uses xauth for pre-shared key authentication:

  ISAKMP crypto key? address 0.0.0.0 0.0.0.0

  BUT for my backup of VPN connection to work, I need to use the dynamic IP to the IP address of the peer that requires:

  ISAKMP crypto key? address 0.0.0.0 0.0.0.0 no xauth

  I tried to set the keys for dial-in subnets, but it always seems to use the default value.

  Is this all just not supported or is there a workaround?

  My (main) the host router is a CISCO 1841, my remote router is 877.

  See you soon,.

  Sean

  You need to configure ISAKMP profiles on the server Ezvpn router.

  http://Cisco.com/en/us/Tech/tk583/TK372/technologies_configuration_example09186a00801dddbb.shtml

  Who would do it.

• Changed my pre-shared-key, vpn doesn't work now

  Hello world

  I recently completed implementation of the remote access vpn on my asa 5510.  the software is v8.2.  It was working fine, I was able to connect, able to what whether internally on our network, rdp worked, ping etc.  I gave the FCP file to another person in our IT Department to test with me before we rolled it out to our users.  He then called me to ask the pre-shared key cause he wanted to implement on his ipad.  I then realized that I never made a note anywhere of that pre-shared-key, I used.

  So I changed it.  Deleted the one in the cli, made a new.  Changed the key on my vpn client and logged.  I can connect properly.  But, now I can't do ANYTHING in-house.  Ping does not work, rdp, nothing.  I can't even ping the client connected to the asa.  Is there anything else I need to do?  I have to redo everything because changing it broke encryption or something?

  Please help, thanks.

  Try to redo the configuration of the tunnel group only.
  And the computer should be good

  Sent by Cisco Support technique iPad App

• ASA pre shared key

  I currently use an ASA 5550 version 8.2 anwith ASDM version 6.2.

  I have an ASA 5505 in remote and unable to connect via VPN.

  My papers say perhaps unsuited pre-shared key.

  On my 5550, via the ASDM I used the command more: execution of the system-config and it will not show my before shared key in plain text format, shows only one *.

  Any help would be appreciated.

  Hello

  The command should work.

  I guess you could always consider using the CLI and by inserting the command.

  "If that leads to the same result you should probably consider you might have to copy and paste the ' * ' as the PSK real at some point?

  I created a ' tunnel-group ' example in my ASA with commands

  tunnel-group 1.1.1.1 type ipsec-l2l

  tunnel-group 1.1.1.1 ipsec-attributes

  IKEv1 pre-shared-key TESTPSK
  

  ASA # sh run 1.1.1.1 tunnel-group

  tunnel-group 1.1.1.1 type ipsec-l2l

  tunnel-group 1.1.1.1 ipsec-attributes

  IKEv1 pre-shared-key *.

  I discover with "more system: running-config"

  ASA # more system: running-config | start the tunnel-group 1.1.1.1

  tunnel-group 1.1.1.1 type ipsec-l2l

  tunnel-group 1.1.1.1 ipsec-attributes

  IKEv1 pre-shared-key TESTPSK

  This works as expected

  -Jouni

• Access point Cisco does not recognize correctly entered the WPA pre-shared key

  My router is a Cisco DPC/EPC2325 DOCSIS residential gateway with wireless access Point. When connecing to Internet via a wireless adapter, this device does not accept the good WPA pre-shared key. I have no similar problem with another PC. Please notify.

  You mean that you corrected it?
  Great! Thanks for sharing this info with us!

• Pre-shared key hidden RV042

  Hello world

  I would like to know if its possible to hide the pre-shared in the router configuration.

  By default, you can see clearly if you access on the RV042.

  Thanks for your comments.

  Kind regards

  HDAM

  Hello hdam,.

  I know, when you are administering and access the configuration of the router and configuring VPN, there is no method (or a check box) to hide the pre-shared away from plain text.

  If security is a concern, perhaps limit available for the vpn router management access, so not too many users will know the pre-shared key.

  -Andrew link

• pre-shared key length

  Hello

  What is the key length maximum for a pre-shared in a VPN configuration and all characters are allowed?

  Robert,

  The maximum PSK is 129 characters, I have used all types of characters before, without any problem.

  HTH.

• Ports used in IKE Phase 1

  Hello world

  He had to confirm IKE Phase 1

  We use port UDP 500

  IKE Phase 2, we use ports

  ESP - 50

  NAT - T UDP 4500

  ESP TCP-1000-50
  NAT - T UDP 4500
  TCP-1000

  Concerning

  Mahesh

  IKE phase 1 (main mode/aggressive mode) is udp src and dst 500

  Phase 2 of IKE could be:

  • Protocol IP 50 (ESP)
  • NAT - T is udp src (customer) ephemeral dst (server) udp 4500
  • In former VPN clients tcp encapsulation was CBC (customer), ephemeral dst (server) tcp 10000 (10,000 in US) and 10,000 in most of the other countries

• How can configure auronomous with WPA2 pre-shared key access point

  I worked with the 4400 WLC series and set up access points aironet 1140, and all work without any problems.but when I tried to configure the autonomous access point I couldn't configure the AP with WPA or WPA2 preshared key and I could configure it with WEP, I want to help here.

  Wi - Fi Protected Access 2 (WPA 2) Configuration example
  http://www.Cisco.com/en/us/Tech/tk722/tk809/technologies_configuration_example09186a008054339e.shtml

  Please rate when useful or appropriate.

• Show pre-shared on 125 6.3 (5)

  I have PIX 535, using 5,0000 code 125.

  is there a show command to see the pre-shared key that a the peer IPSec VPN?

  Thank you, Kevin

  TFTP-server core /backup

  write the net

  Jon

• BlackBerry smartphone WIFI pre shared

  I will set up my Wifi on BB 8220 and during the installation I get enter pre shared number? Being a beginner to the network I do not understand the meaning.

  I entered in manage connections wifi turned on, then went into setting up wifi network and seen pre shared key. I am on wifi or not. With my first BB, I have entered the livebox security code in the box, and had to change the phone due to battery failure, it's a replacement.

  I'm back on emails from when I entered pin no. again.

  I don't know if my wifi works.

  (Your carrier signal) wireless and WiFi (wireless network, such as a LAN) are two different things.

  So, Yes, for the WiFi, you must within the range of the WiFi network.

• Pre-shared blackBerry Smartphones?

  I just got a Curve 8900 and I am trying to set up my wi - fi but I must put in a pre-shared key (PSK) to access. I know my network key but cannot find a pre-shared key. Any help would be much appreciated. Thank you.

  Your router asks the pre-shared key... it's something installation you or the owner of WiFi router with the router. It is not a smart phone BlackBerry created password. Check with the owner of the router.

• Understanding, IKE Phase I and II

  Hi, I've been through the concept of a lot of time, but what confuses me, is encryption algorithm and a key to the DH, how they go hand in hand in IKE phase II.  I understand phase I authenticates the vpn peers and negotiates policy ISAKMP which includes Exchange Diffie-Hellman and symmetric encryption example WITH or TDES.  What I don't understand is what Exchange Diffie-Hellman (key derived from the public/private function) is used for, it encrypts the exchange of IKE2 already encrypted with DES/TDES/AES.

  Also if m do not use PFS in Phase II, would I by using the same key DH derived at the time of the phase I, if yes which is secure enough?

  Another issue is when the peers authenticate each other and then the protocol IKE phase I policy are exchanged, happens in clear text?

  Could someone please explain the process step by step in the two phases stressing precisely on the Diffie-Hellman exchange and how it is used with encryption algorithms.

  Concerning

  Sonu

  Sonu,

  Looks like you want to go back to RFC to take a peek. We have also a series of documents explaining IKEv1 and goes with debugging.

  What you miss is that in IKEv1 (main mode), messages, 5 and 6 are already encyrpted, while the previous, including Diffie-Hellman exchange are not.

  MM5 MM6 is when we exchange their identities. Those who must be protected, where the DH before negotiating.

  Phase 2 is a separate Exchange protected with the result of the phase 1. The role of DH for the phase 2 is to ensure that the encryption keys are not from previous key material.

  Start here:

  http://www.Cisco.com/en/us/Tech/tk583/TK372/technologies_tech_note09186a0080094203.shtml

  http://www.Cisco.com/en/us/products/ps6120/products_tech_note09186a0080bce100.shtml

  https://supportforums.Cisco.com/docs/doc-18522

  M.