Default configuration of the PFS on the Cisco ISR

Hello

I want to learn more about the default configuration of PFS on the Cisco ISR router.

-Introduction to IP Security (IPSec) encryption - create a Crypto map
http://www.Cisco.com/en/us/Tech/tk583/TK372/technologies_tech_note09186a0080094203.shtml#cryptomap

You can also change the configuration of your PFS here. PFS Group1 is the default value in this example. You can change the PFS to group2, or turn off all together, you should not do.

DT3-45 a (config) #crypto card armadillo 10 ipsec-isakmp
DT3 - 45's (config-crypto-map) #set counterpart 192.168.10.38
DT3 - 45 session key has seconds (config-crypto-map) #set 4000
DT3 - 45's (config-crypto-map) #set transform-set HAAT PapaBear BabyBear
DT3 - 45's (config-crypto-map) #match address 101
--------

This example has no configuration PFS PFS is set to group1.
However, the following command reference indicates that PFS is not requested.
Which is the correct description for the PFS setting?

-the pfs value
http://www.Cisco.com/en/us/docs/iOS/Security/command/reference/sec_s2.html#wp1063163

Default values
By default, it is not required of PFS. If no group is specified with this command, the Group1 keyword is used by default.
-------

Thank you for your cooperation in advance.

Order is correct.

If pfs set is not configured in the crypto map configuration, pfs will be negotiated not.

If set pfs is configured without any group, then it uses default group1

And if you do not want to use the other group, you set the group # in the command set pfs.

I hope it is clear now.

Tags: Cisco Security

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    Please provide a copy of your system information file. Type the system information in the search box above the Start button and press the ENTER key (alternative is select Start, all programs, accessories, System Tools, system information). Select file, Export and give the file a name noting where it is located. Not to place the cursor in the body of the report before exporting the file. The system creates a new information file system each time system information is available. You must allow a minute or two before the file is completely filled before exporting a copy. Please download the file to your OneDrive, to share with everyone and post a link here. Normal mode preferred report. Please say if the report was obtained in safe mode. If the report is in one language other than English, please indicate the language.

    Please download and share with everyone a new copy of your log System of your event viewer on your disc one and post a link here. It allows to avoid confusion if you delete all previous copies of the log files of your OneDrive.

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    For assistance OneDrive see paragraph 9.3:
    http://www.gerryscomputertips.co.UK/MicrosoftCommunity1.htm

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