Use the crypto command to define a system-level local ID for ISAKMP negotiation and enter the ISAKMP policy, ISAKMP client, or ISAKMP peer configuration mode.
A crypto map entry is a single policy that describes how certain traffic is secured. There are two types of crypto map entries: ipsec-manual and ipsec-ike entries. Each entry is given an index (used to sort the ordered list).
When a non-secured packet arrives on an interface, the crypto map associated with that interface is processed (in order). If a crypto map entry matches the non-secured traffic, the traffic is discarded.
When a packet is transmitted on an interface, the crypto map associated with that interface is processed. The first crypto map entry that matches the packet is used to secure the packet. If a suitable SA (Security Association) exists, it is used for transmission. Otherwise, IKE is used to establish a SA with the peer. If no SA exists (and the crypto map entry is “respond only”), the packet is discarded.
When a secured packet arrives on an interface, its SPI (Security Parameter Index) is used to look up a SA. If a SA does not exist (or if the packet fails any of the security checks), it is discarded. If all checks pass, the packet is forwarded normally.
crypto [auto-ipsec-secure|enable-ike-uniqueids|ike-version|ikev1|ikev2|ipsec| load-management|map|pki|plain-text-deny-acl-scope|remote-vpn-client]
crypto [auto-ipsec-secure|enable-ike-uniqueids|load-management]
crypto ike-version [ikev1-only|ikev2-only]
crypto ikev1 [dpd-keepalive <10-3600>|dpd-retries <1-100>|nat-keepalive <10-3600>| peer <IKEV1-PEER>|policy <IKEV1-POLICY-NAME>|remote-vpn]
crypto ikev2 [cookie-challenge-threshold <1-100>|dpd-keepalive <10-3600>|dpd-retries <1-100>| nat-keepalive <10-3600>|peer <IKEV2-PEER>|policy <IKEV2-POLICY-NAME>|remote-vpn]
crypto ipsec [df-bit|security-association|transform-set]
crypto ipsec df-bit [clear|copy|set]
crypto ipsec security-association lifetime [kilobytes <500-2147483646>|seconds <120-86400>]
crypto ipsec transform-set <TRANSFORM-SET-TAG> [esp-3des|esp-aes|esp-aes-192|esp-aes-256| esp-des|esp-null] [esp-aes-xcbc-mac|esp-md5-hmac|esp-sha-hmac|esp-sha256-hmac]
crypto map <CRYPTO-MAP-TAG> <1-1000> [ipsec-isakmp {dynamic}|ipsec-manual]
crypto pki import crl <TRUSTPOINT-NAME> URL <1-168>
crypto plain-text-deny-acl-scope [global|interface]
crypto remote-vpn-client
crypto [auto-ipsec-secure|enable-ike-uniqueids|load-management]
| auto-ipsec-secure | Configures the Auto IPSec Secure parameter settings. For Auto IPSec tunnel configuration commands, see crypto-auto-ipsec-tunnel commands. |
| enable-ike-uniqueids | Enables IKE (Internet Key Exchange) unique ID check. For more information on IKE unique IDs, see remotegw. |
| load-management | Configures load management for platforms using software cryptography |
crypto ike-version [ikev1-only|ikev2-only]
| ike-version [ikev1-only|ikev2-only] | Selects and
starts the IKE daemon
|
crypto ikev1 [dpd-keepalive <10-3600>|dpd-retries <1-100>|nat-keepalive <10-3600>|peer <IKEV1-PEER>|policy <IKEV1-POLICY-NAME>|remote-vpn]
| ikev1 | Configures the IKE version 1 parameters |
| dpd-keepalive <10-3600> | Sets the global Dead Peer Detection (DPD) keep alive interval from 10 - 3600 seconds. This is the interval between successive IKE keep alive messages sent to detect if a peer is dead or alive. The default is 30 seconds. |
| dpd-retries <1-1000> | Sets the global DPD retries count from 1 - 1000. This is the number of keep alive messages sent to a peer before the tunnel connection is declared as dead. The default is 5. |
| nat-keepalive <10-3600> | Sets the global NAT keep alive interval from 10 - 3600 seconds. This is the interval between successive NAT keep alive messages sent to detect if a peer is dead or alive. The default is 20 seconds. |
| peer <IKEV1-PEER> | Specify the name/Identifier for the IKEv1 peer. For IKEV1 peer configuration commands, see crypto-ikev1/ikev2-peer commands. |
| policy <IKEV1-POLICY-NAME> | Configures an
ISKAMP policy. Specify the name of the policy. The local IKE policy and the peer IKE policy must have matching group settings for successful negotiations. For IKEV1 policy configuration commands, see crypto-ikev1/ikev2-policy commands. |
| remote-vpn | Specifies the IKEV1 remote-VPN server configuration (responder only) |
crypto ikev2 [cookie-challenge-threshold <1-100>|dpd-keepalive <10-3600>|dpd-retries <1-100>|nat-keepalive <10-3600>|peer <IKEV2-PEER>|policy <IKEV2-POLICY-NAME>|remote-vpn]
| ikev2 | Configures the IKE version 2 parameters |
| cookie-challenge-threshold <1-100> | Starts the cookie challenge mechanism after the number of half open IKE SAs exceeds the specified limit. Specify the limit from 1 - 100. The default is 5. |
| dpd-keepalive <10-3600> | Sets the global DPD keepalive interval from 10 - 3600 seconds. The default is 30 seconds. |
| dpd-retries <1-100> | Sets the global DPD retries count from 1 - 100. The default is 5. |
| nat-keepalive <10-3600> | Sets the global NAT keepalive interval from 10 - 3600 seconds. The default is 20 seconds. |
| peer <IKEV2-PEER> | Specify the name/Identifier for the IKEv2 peer |
| policy <IKEV2-POLICY-NAME> | Configures an
ISKAMP policy. Specify the policy name. The local IKE policy and the peer IKE policy must have matching group settings for successful negotiations. |
| remote-vpn | Specifies an IKEv2 remote-VPN server configuration (responder only) |
crypto ipsec df-bit [clear|copy|set]
| ipsec | Configures the IPSec policy parameters |
| df-bit [clear|copy|set] | Configures
Don‘t-Fragment (DF) bit handling for encapsulating header.
The options are:
|
crypto ipsec security-association lifetime [kilobytes <500-2147483646>|seconds <120-86400>]
| ipsec | Configures the IPSec policy parameters |
| security-association | Configures the IPSec SAs parameters |
| lifetime [kilobyte |seconds] | Defines the
IPSec SAs lifetime (in kilobytes and/or seconds). Values can be entered in
both kilobytes and seconds, which ever limit is reached first, ends the SA.
When the SA lifetime ends it is renegotiated as a security measure.
The security association lifetime can be overridden under crypto maps. |
crypto ipsec transform-set <TRANSFORM-SET-TAG> [esp-3des|esp-aes|esp-aes-192| esp-aes-256|esp-des|esp-null] [esp-aes-xcbc-mac|esp-md5-hmac|esp-sha-hmac| esp-sha256-hmac]
| ipsec | Configures the IPSec policy parameters |
| transform-set <TRANSFORM-SET-TAG> | Defines the
transform set configuration (authentication and encryption) for securing
data. A transform set is a combination of security protocols, algorithms and
other settings applied to IPSec protected traffic.
After specifying the transform set used by the IPSec transport connection, set the encryption method and the authentication scheme used with the transform set. The encryption methods are: DES, 3DES, AES, AES-192 and AES-256. Note: The authentication
schemes available are: esp-md5-hmac and esp-sha-hmac.
|
| esp-3des | Configures the
ESP transform using 3DES cipher (168 bits). The transform set is assigned to
a crypto map using the map‘s set > transform-set
command. |
| esp-aes | Configures the ESP transform using AES (Advanced Encryption Standard) cipher. The transform set is assigned to a crypto map using the map‘s set > transform-set command. |
| esp-aes-192 | Configures the
ESP transform using AES cipher (192 bits). The transform set is assigned to
a crypto map using the map‘s set > transform-set
command. |
| esp-aes-256 | Configures the
ESP transform using AES cipher (256 bits). The transform set is assigned to
a crypto map using the map‘s set > transform-set
command. This is the default setting. |
| esp-des | Configures the
ESP transform using Data Encryption Standard (DES) cipher (56
bits). The transform set is assigned to a crypto map using the map‘s set >
transform-set command. |
| esp-null | Configures the ESP transform with no encryption |
| [esp-aes-xcbc-mac| esp-md5-hmac| esp-sha-hmac| esp-sha256-hmac] | The following
keywords are common to all of the above listed transform sets. After specifying the transform set type, configure the authentication scheme used to validate identity credentials. The options are:
|
crypto map <CRYPTO-MAP-TAG> <1-1000> [ipsec-isakmp {dynamic}|ipsec-manual]
| map <CRYPTO-MAP-TAG> | Configures the
crypto map, a software configuration entity that selects data flows that
require security processing. The crypto map also defines the policy for
these data flows.
|
| <1-1000> | Defines the crypto map entry sequence. Each crypto map uses a list of entries, each entry having a specific sequence number. Specifying multiple sequence numbers within the same crypto map provides the flexibility to connect to multiple peers from the same interface. Specify a value from 1 - 1000. |
| ipsec-isakmp {dynamic} | Configures IPSEC
w/ISAKMP.
|
| ipsec-manual | Configures IPSEC w/manual keying. Remote configuration is not allowed for manual crypto map. |
crypto pki import crl <TRUSTPOINT-NAME> <URL> <1-168>
| pki | Configures certificate parameters. The Public Key Infrastructure (PKI) protocol creates encrypted public keys using digital certificates from certificate authorities. |
| import | Imports a trustpoint related configuration |
| crl <TRUSTPOINT-NAME> | Imports a
Certificate Revocation List (CRL) . Imports a trustpoint
including either a private key and server certificate or a certificate
authority (CA) certificate or both. A CRL is a list of revoked certificates that are no longer valid. A certificate can be revoked if the CA had improperly issued a certificate, or if a private-key is compromised. The most common reason for revocation is the user no longer being in sole possession of the private key.
|
| <URL> | Specify the CRL
source address in the following format. Both IPv4 and IPv6 address formats
are supported. tftp://<hostname|IPv4 or IPv6>[:port]/path/file ftp://<user>:<passwd>@<hostname|IPv4 or IPv6>[:port]/path/file sftp://<user>:<passwd>@<hostname|IPv4 or IPv6>[:port]>/path/file http://<hostname|IPv4 or IPv6>[:port]/path/file cf:/path/file usb<n>:/path/file |
| <1-168> | Sets command replay duration from 1 - 168 hours. This is the interval (in hours) after which devices using this profile copy a CRL file from an external server and associate it with a trustpoint. |
crypto plain-text-deny-acl-scope [global|interface]
| plain-text-deny-acl-scope | Configures plain-text-deny-acl-scope parameters |
| global | Applies the plain text deny ACL globally. This is the default setting. |
| interface | Applies the plain text deny ACL to the interface only |
crypto remote-vpn-client
| remote-vpn-client | Configures remote VPN client settings. For more information, see crypto-remote-vpn-client commands. |
nx9500-6C8809(config-profile-default-ap8533)#crypto ipsec transform-set tpsec-tag1 esp-aes-256 esp-md5-hmac nx9500-6C8809(config-profile-default-ap8533)#crypto map map1 10 ipsec-isakmp dynamic nx9500-6C8809(config-profile-default-ap8533)#crypto plain-text-deny-acl-scope interface nx9500-6C8809(config-profile-default-ap8533)#show context profile ap8533 default-ap8533 bridge vlan 1 tunnel-over-level2 ip igmp snooping ip igmp snooping querier no autoinstall configuration no autoinstall firmware device-upgrade persist-images crypto ikev1 dpd-retries 1 crypto ikev1 policy ikev1-default isakmp-proposal default encryption aes-256 group 2 hash sha crypto ikev2 policy ikev2-default isakmp-proposal default encryption aes-256 group 2 hash sha crypto ipsec transform-set default esp-aes-256 esp-sha-hmac crypto ipsec transform-set tpsec-tag1 esp-aes-256 esp-md5-hmac crypto map map1 10 ipsec-isakmp dynamic crypto ikev1 remote-vpn crypto ikev2 remote-vpn crypto auto-ipsec-secure crypto plain-text-deny-acl-scope interface interface radio1 interface radio2 interface up nx9500-6C8809(config-profile-default-ap8533)# nx9500-6C8809(config-profile-default-ap8533)#crypto ipsec transform-set tag1 esp-null esp-md5-hmac nx9500-6C8809(config-profile-default-ap8533-transform-set-tag1)#? Crypto Ipsec Configuration commands: mode Encapsulation mode (transport/tunnel) no Negate a command or set its defaults clrscr Clears the display screen commit Commit all changes made in this session end End current mode and change to EXEC mode exit End current mode and down to previous mode help Description of the interactive help system revert Revert changes service Service Commands show Show running system information write Write running configuration to memory or terminal nx9500-6C8809(config-profile-default-ap8533-transform-set-tag1)#
| no | Disables or reverts settings to their default |