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Book Contents Book Contents. Find Matches in This Book. Log in to Save Content. PDF - Complete Book 2. Updated: March 15, Cannot start the Certificate Server " The following lists the common problems and resolution related to certificates. Possible Cause Clock is not set on the controller. Recommended Solution Set the clock on using the command. Device config clock calendar-valid Configuring the CA server ""Error in receiving Certificate Authority certificate" Possible Cause Lost connectivity to the managemet interface.
Recommended Solution: Check if the management interface IP of the virtual controller is reachable. Recommended Solution: Build a chain of certificates beginning with the certificate of the CA that issued the controller certificate on the controller. Recommended Solution: Use the command to troubleshoot certificate issues. Device debug crypto pki transactions Export the private key out. This means your file will contain content as below. Certificate validity date or isssuer details is incorrect.
Device config no wireless management trustpoint Syslog Error message Dec 31 Recommended Solution: Allow APs to join with expired certificates by configuring policy maps Create a certificate map and add the rules. Device configure terminal Device config crypto pki certificate map map1 2 Device config issuer-name co act2 sudi ca Device configure terminal Device config crypto pki trustpool policy Device config match certificate map1 allow expired-certificate Table 1.
Additional Debug Commands Command Description debug crypto pki validation Displays debugging messages related to public key infrastructure PKI path validation. Was this Document Helpful? RouterP config clock timezone zone hours [minutes]RouterP clock set hh:mm:ss day month yearc.
Ensure connectivity to the CA server from your router:RouterP ping Make sure to work withthe CA server administrator to complete this portion of the lab exercise. Define the router domain name:RouterP config ip domain-name cisco. Use for the number of bits for themodulus. Perform the following substeps to configure the CA server trustpoint:i. Create a name for the CA and enter ca-trustpoint mode:RouterP config crypto ca trustpoint vpncaii.
Choose the registration authority mode:RouterP ca-trustpoint enrollment mode ra4 - 13 Fundamentals of Network Security v 1. Specify that the router can still accept other peers certificates if the certificate revocation list CRL is not accessible:RouterP ca-trustpoint crl optionalv.
Authenticate the CA server. Enroll to the CA server. Ensure that the CA administrator accepts the enrollment request. Answer the prompts as shown in the example. You will need to verbally providethispassword to the CA Administrator in order to revoke yourcertificate. For security reasons your password will not be saved in theconfiguration. Please make a note of it.
Make sure to work with themembers of the peer pod to complete this section of the lab. Note: While entering commands, notice when the command line prompt changes. This helpsdistinguish what configuration mode is active. Set the policy priority:RouterP config crypto isakmp policy ii.
What other encryption choice can be used? Set the Diffie-Hellman group:RouterP config-isakmp group What would be the benefit of using Diffie-Hellman Group 2? Set the hash algorithm:RouterP config-isakmp hash md5vi. Configure transform sets and security association parametersComplete the following steps to configure transform sets and security association SA parameters:b. Check the transform set options:RouterP config crypto ipsec transform-set? Define a transform set.
Set the mode to tunnel:RouterP cfg-crypto-trans mode tunnelf. Configure crypto access listsComplete the following steps to configure the crypto access lists. Create an access list to selectthe traffic to protect. The access list should encrypt traffic between perimeter routers. Ensure that configuration mode is enabled:RouterP config config terminalj. Configure the access list:RouterP config access-list permit ip host Configure crypto mapsComplete the following steps to configure a crypto map.
Set the name of the map, the map number, and the type of key exchange to be used:RouterP config crypto map mymap 10 ipsec-isakmpm. Specify the extended access list to use with this map:RouterP config-crypto-map match address n. Specify the transform set defined earlier:RouterP config-crypto-map set transform-set mineo. Exit crypto-map configuration mode:RouterP config-crypto-map exitq.
Apply the crypto map to an interfaceComplete the following steps to assign the crypto map to the appropriate router interface. Assign the crypto map to the interface:RouterP config-if crypto map mymapt.
To terminate this output, use the no debug crypto isakmp command. Example depicts the output from the command on the New York router as it negotiates a connection with the router in San Francisco. The command is executed from the privileged EXEC mode and displays the exchange of public keys between peers.
To terminate this command, use the no debug crypto key-exchange command. Received 4 bytes. Received 2 bytes. Received 4 9 bytes. Received 15 bytes. All encryption and decryption are performed in the crypto engine.
The debug crypto engine command enables you to display the message that occurs and the crypto engine functions. To terminate this command, use the no debug crypto engine command. We can either manually grant all certificate requests or automatically grant all requests. We will configure a password to provide some additional authentication when users try to enroll. First we configure sha-1 as the hash algorithm used to sign the certificates with MD5 is the default.
We configure the lifetime of the certificate servers signing certificate 5 years when this expires all issued certificates are invalidated and users will have to re-enroll. Now we configure the lifetime of client issued certificates after which clients will have to re-enroll.
Both lifetimes are counted in days. Note -to enter the "? Finally we enable the certificate server now that all the prerequisites have been configured : First we must ensure that the time of the Certificate Server is correct! Well configured and synchronized time on all devices is very important in a PKI environment!! Now the Certificate server is configured and running : We can validate this with the show crypto pki server command.
Now we need to configure the trustpoint to tell the client how we would like it to enroll. Its worth defining the source IP for this enrollment to avoid issues See comments below and thanks for Joshua for pointing out :. Stay up to date! A quick step by step overview of how to configure the certificate server on a Cisco IOS device. CA conf t Enter configuration commands, one per line. PKI Trustpoint The trustpoint configures what key pair will be used within the certificate server.
Certificate Server Now we create and configure the actual certificate server. Issuing Policy We can either manually grant all certificate requests or automatically grant all requests. CA config ip http server 7.
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debug crypto pki server debug crypto pki transation logging con 7 logging on. #show the purpose use for all certificate sh crypto pki certificate. spanning-tree cisco-interoperability (MSTP) show ip dns forwarding server. debug crypto pki (deleted). This lesson explains how to configure PKI authentication for Cisco FlexVPN R1(config)#crypto pki server R1-CA R1(cs-server)#issuer-name cn="R1-CA".