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This module describes the different methods available for certificate enrollment and how to set up each method for a participating PKI peer. Certificate enrollment, which is the process of obtaining a certificate from a certification authority CAoccurs between the end host that requests the certificate and the CA.

how to configure crypto on cisco router

Security threats, as well as the cryptographic technologies to help protect against them, are constantly changing. Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release.

To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www. An account on Cisco. Before configuring peers for certificate enrollment, you should have the following items:. Enable NTP on the device so that the PKI services such as auto enrollment and certificate rollover may function correctly. A CA is an entity that issues digital certificates that other parties can use.

It is an example of a trusted third party. 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.

Basic Router Configuration Using Cisco Configuration Professional

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. Multiple CAs provide users with added flexibility and reliability.

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.This sample configuration details how to set up encryption of both existing and new pre-shared keys. The information in this document was created from the devices in a specific lab environment.

All of the devices used in this document started with a cleared default configuration. If your network is live, make sure that you understand the potential impact of any command. Refer to the Cisco Technical Tips Conventions for more information on document conventions. This section presents you with the information you can use to configure the features this document describes. The master key is not stored in the router configuration and cannot be seen or obtained in any way while connected to the router.

Once configured, the master key is used to encrypt any existing or new keys in the router configuration. If the [master key] is not specified on the command line, the router prompts the user to enter the key and to re-enter it for verification. If a key already exists, the user is prompted to enter the old key first. Keys are not encrypted until you issue the password encryption aes command. The master key can be changed although this should not be necessary unless the key has become compromised in some way by issuing the key config-key Any existing encrypted keys in the router configuration are re-encrypted with the new key.

You can delete the master key when you issue the no key config-key However, this renders all currently configured keys in the router configuration useless a warning message displays that details this and confirms the master key deletion. Since the master key no longer exists, the type 6 passwords cannot be unencrypted and used by the router. Once passwords are encrypted, they are not unencrypted.

Existing encrypted keys in the configuration are still able to be unencrypted provided the master key is not removed. Additionally, in order to see debug-type messages of password encryption functions, use the password logging command in configuration mode. Contents Introduction. Router show running-config Building configurationThis sample configuration shows how to encrypt traffic between a private network The This document requires a basic understanding of IPSec protocol.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared default configuration.

IPSEC VPN ROUTER TO ROUTER

If your network is live, make sure that you understand the potential impact of any command. For more information on document conventions, refer to Cisco Technical Tips Conventions. In this section, you are presented with the information to configure the features described in this document. Certain show commands are supported by the Output Interpreter Tool registered customers onlywhich allows you to view an analysis of show command output. To verify this configuration, try an extended ping command sourced from the Ethernet interface on the private router Use the show crypto engine command in privileged EXEC mode.

The encrypted tunnel is built between Contents Introduction. Current configuration:! Use the crypto isakmp policy! IKE policies! This is an acceptable! This is an! Use the ip nat pool command in! Use the ip nat inside source!

how to configure crypto on cisco router

They are not NATed!Secure Shell SSH is a protocol which provides a secure remote access connection to network devices. Implement SSH version 2 when possible because it uses a more enhanced security encryption algorithm. This document contains more information on specific versions and software images.

For example ce-universalk9-tar. SSH Version 1. SSH Version 2. Refer to the Software Advisor registered customers only for a complete list of feature sets supported in different Cisco IOS Software releases and on different platforms. The information presented in this document was created from devices in a specific lab environment. All of the devices used in this document started with a cleared default configuration.

If you are in a live network, make sure that you understand the potential impact of any command before you use it. Refer to Cisco Technical Tips Conventions for more information on document conventions. Authentication through the line password is not possible with SSH. This example shows local authentication, which lets you Telnet into the router with username "cisco" and password "cisco.

At this point, the show crypto key mypubkey rsa command must show the generated key. If this does not work, see the debug section of this document. If you want to prevent non-SSH connections, add the transport input ssh command under the lines to limit the router to SSH connections only. Straight non-SSH Telnets are refused. These devices are then in a client-server arrangement, where Carter acts as the server, and Reed acts as the client.

If you need outbound SSH terminal-line authentication, you can configure and test SSH for outbound reverse Telnets through Carter, which acts as a comm server to Philly. This is an example configuration. In this example only SSH access to the Workaround is to configure SSHv2.

The banner command output varies between the Telnet and different versions of SSH connections. This table illustrates how different banner command options work with various types of connections.

SSH version 2 supports the login banner. For example, when the Secure Shell ssh client is used, the login banner is displayed. When the PuTTY ssh client is used, the login banner is not displayed.Your software release may not support all the features documented in this module.

For the latest feature information and caveats, see the release notes for your platform and software release.

To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www. An account on Cisco. IKEv2 supports crypto map-and tunnel protection-based crypto interfaces. The transform types used in the negotiation are as follows:. You must configure at least one encryption algorithm, one integrity algorithm, and one DH group for the proposal to be considered incomplete.

The PRF algorithm is the same as the integrity algorithm, and hence, it is not configured separately. Multiple transforms can be configured and proposed by the initiator for encryption, integrity, and group, of which one transform is selected by the responder.

When multiple transforms are configured for a transform type, the order of priority is from left to right. IKEv2 proposals are named and not numbered during the configuration. Manually configured IKEv2 proposals must be linked with an IKEv2 policy; otherwise, the proposals are not used in the negotiation. HMAC is a variant that provides an additional level of hashing. Each suite consists of an encryption algorithm, a digital-signature algorithm, a key-agreement algorithm, and a hash- or message-digest algorithm.

It can have match statements which are used as selection criteria to select a policy during negotiation. An IKEv2 profile is a repository of the nonnegotiable parameters of the IKE SA, such as local or remote identities and authentication methods and the services that are available to the authenticated peers that match the profile. After EAP authentication, the EAP identity, which is used for the configured user or group authorizations, is obtained from the following sources in the given order:.

The authorization data received from the EAP server along with the EAP success message is considered as the user authorization data. User authorization if configured is performed only if the EAP server does not provide authorization data along with the EAP success message or provides an invalid framed-ip-address per-user attribute.

Attributes received from the EAP server are overridden and merged with the user authorization data. A lower priority address sources is used for address allocation only if the higher priority address source is not configured.

However, if address allocation from the higher priority address source results in an error, the next source is not tried and the session is terminated. If the client requests multiple IPv4 addresses, only one IPv4 address is sent in the reply. An IPv4 address is allocated and included in the reply only if the client requests an address. If available, the remaining attributes are included in the reply even though the client does not request it.This document describes how to use the Cisco Configuration Professional Cisco CP in order to set the basic configuration of the router.

Basic configuration of the router includes configuration of the IP address, default routing, static and dynamic routing, static and dynamic NATing, host name, banner, secret password, user accounts, and other options. Cisco CP allows you to configure your router in several network environments, such as small office home office SOHObranch office BOregional office, and central site or Enterprise headquarters, with an easy-to-use web-based management interface.

The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared default configuration. If your network is live, make sure that you understand the potential impact of any command. Download Cisco CP V2. In order to discover the device you want to configure, highlight the router and click the Discover button. Do not use the same password for your user and enable passwords.

This document assumes that the Cisco router is fully operational and configured to allow the Cisco CP to make configuration changes. Refer to the Cisco Technical Tips Conventions for more information on document conventions.

Configuring Secure Shell on Routers and Switches Running Cisco IOS

In this section, you are presented with the information to configure the basic settings for a router in a network. They are RFC addresses which have been used in a lab environment. The Cisco CP homepage provides information such as the hardware and software of the router, feature availability, and a configuration summary. Specify the static IP address with the corresponding subnet mask for the interface and click Next. Configure the default routing with optional parameters such as the next hop IP address This window appears and shows the configuration summary configured by the user.

Click Finish. This is an optional feature available. This window appears and shows the command delivery status to the router.

Configuring IPSec Router-to-Router, Pre-shared, NAT Overload Between a Private and a Public Network

Otherwise, it displays errors if the command delivery fails due to incompatible commands or unsupported features. Highlight the interface with which you want to make changes and click Edit if you want to edit or change the interface configuration.

Here, you can change the existing static IP address. Choose the interface that connects to the Internet or your ISP and choose the IP address range to which Internet access is to be shared. After choosing this information, click Next as shown here:. Here, information such as the pool name and IP address range with netmask are provided. There can be times when most of the addresses in the pool have been assigned, and the IP address pool is nearly depleted. Click OK. This window shows the configuration for dynamic NATing with the address pool.

Use this window in order to designate the inside and outside interfaces that you want to use in NAT translations. NAT uses the inside and outside designations when it interprets translation rules, because translations are performed from inside to outside, or from outside to inside.

Once designated, these interfaces are used in all NAT translation rules. Choose the Direction either from inside to outside or from outside to inside, and specify the inside IP address to be translated under Translate from Interface. For the Translate to Interface area, choose the Type:. Choose Interface if you want the Translate from Address to use the address of an interface on the router. The Translate from Address is translated to the IP address assigned to the interface that you specify in the Interface field.

Check Redirect Port if you want to include port information for the inside device in the translation.Even then, SSH should be configured in case the access server fails.

how to configure crypto on cisco router

To be able to SSH into any Cisco device first we need to create at least one user account on the device. Most people believe that the ip domain-name command is required in order to generate a certificate. Now see what happens if we try without it. By default the router will respond to all versions of SSH connections. We can restrict this by telling the router to respond to v2 requests only.

You can enable only SSH or only Telnet too. Your email address will not be published. Post comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Necessary cookies are absolutely essential for the website to function properly.

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Creating a user account using secret C config username admin privilege 15 secret Notget! Creating a Self-Signed Certificate using the router's name as the!

The label is important, I'll tell you! We need to tell the router to use the local user database when authenticating! Restricting access to SSH only on the virtual interface. By default all access is! C config ip ssh version 2 verification Here is the output from Putty after connecting to the router. Sisko Warrior. Leave a Reply Cancel reply Your email address will not be published. Search Search Close.

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