Cisco ios crypto pki authenticate

It is therefore quite possible to authenticate a CA successfully, while not enrolling successfully. It is equally important to inspect the certificates for validity after PKI authentication and enrollment, in order to avoid IKE authentication errors with RSA signatures.

Once certificates have been received by each VPN endpoint, they should be checked for consistency. Up until this point, we've discussed common troubleshooting tactics for debugging Phase 1 negotiation errors. In order for two peers to successfully negotiate an IPsec SA, they must agree on three things specific to Phase 2 negotiation: The IP addresses used for IPsec tunnel termination The symmetric IPsec transforms to use on crypto-protected traffic after an IPsec SA has been negotiated The scope of protected traffic in the crypto switching path Note - Other items in the crypto path can be negotiated during Phase 2 negotiation even if they are mismatched.

We can confirm the inconsistency by debugging the Phase 2 negotiation process using the debug crypto IPsec command. CAs are characteristic of many PKI schemes. A CA manages certificate requests and issues certificates to participating network devices. These services provide centralized key management for the participating devices to validate identities and to create digital certificates. At the top of the hierarchy is a root CA, which holds a self-signed certificate.

Within a hierarchical PKI, all enrolled peers can validate the certificate of one another if the peers share a trusted root CA certificate or a common subordinate CA. For example, subordinate CAs can be placed in branch offices while the root CA is at the office headquarters. Also, different granting policies can be implemented per CA, so you can set up one CA to automatically grant certificate requests while another CA within the hierarchy requires each certificate request to be manually granted.

Scenarios in which at least a two-tier CA is recommended are as follows: Large and very active networks in which a large number of certificates are revoked and reissued. When online enrollment protocols are used, the root CA can be kept offline except to issue subordinate CA certificates. This scenario provides added security for the root CA.

Authentication of the CA The certificate of the CA must be authenticated before the device will be issued its own certificate and before certificate enrollment can occur. Authentication of the CA typically occurs only when you initially configure PKI support at your router. To authenticate the CA, issue the crypto pki authenticate command, which authenticates the CA to your router by obtaining the self-signed certificate of the CA that contains the public key of the CA.

Note PKI does not support certificate with lifetime validity greater than the year So, It is recommended to choose a life time validity fewer than the value If a fingerprint is not preentered for a trustpoint, and if the authentication request is interactive, you must verify the fingerprint that is displayed during authentication of the CA certificate.

If the authentication request is noninteractive, the certificate will be rejected without a preentered fingerprint. Note If the authentication request is made using the command-line interface CLI , the request is an interactive request.

If the authentication request is made using HTTP or another management tool, the request is a noninteractive request. SCEP is the most commonly used method for sending and receiving requests and certificates. Note To take advantage of automated certificate and key rollover functionality, you must be running a CA that supports rollover and SCEP must be used as your client enrollment method.

Manual cut-and-paste--The router displays the certificate request on the console terminal, allowing the user to enter the issued certificate on the console terminal. A user may manually cut-and-paste certificate requests and certificates when there is no network connection between the router and CA. Enrollment profiles-- Enrollment profiles are primarily used for EST or terminal based enrollment.

The saved, self-signed certificate can then be used for future SSL handshakes, eliminating the user intervention that was necessary to accept the certificate every time the router reloaded. Note To take advantage of autoenrollment and autoreenrollment, do not use either TFTP or manual cut-and-paste enrollment as your enrollment method.

Both TFTP and manual cut-and-paste enrollment methods are manual enrollment processes, requiring user input. Each suite consists of an encryption algorithm, a digital signature algorithm, a key agreement algorithm, and a hash or message digest algorithm.

PKI support for validation of for X. An RA offloads authentication and authorization responsibilities from a CA.

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You are prompted to create a challenge password. This password can be up to 80 characters in length. When you ask the CA administrator to revoke your certificate, you must supply this challenge password as a protection against fraudulent or mistaken revocation requests. Note This password is not stored anywhere, so you need to remember this password.

The serial number is not used by IP Security IPsec or Internet Key Exchange, but may be used by the CA to either authenticate certificates or to later associate a certificate with a particular router. Note that the serial number stored is the serial number of the internal board, not the one on the enclosure.

Ask your CA administrator if serial numbers should be included. If you are in doubt, include the serial number. Normally, you would not include the IP address because the IP address binds the certificate more tightly to a specific entity. Also, if the router is moved, you would need to issue a new certificate. A router has multiple IP addresses, any of which might be used with IPsec. If you indicate that the IP address should be included, you will then be prompted to specify the interface of the IP address.

This interface should correspond to the interface that you apply your crypto map set to. If you apply crypto map sets to more than one interface, specify the interface that you name in the crypto map local-address command. When the router displays the certificate fingerprint, the administrator verifies this number by calling the CA administrator, which checks the number. The fingerprint is correct, so the router administrator accepts the certificate.

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