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Cisco Unified Communications Manager Security Guide
OL-24124-01
Chapter 17 Configuring Virtual Private Networks
Configuring IOS for VPN client on IP phone
router(config-if)# duplex auto
router(config-if)# speed auto
router(config-if)# no shutdown
router#show ip interface brief (shows interfaces summary)
b. Configure static and default routes.
router(config)# ip route <dest_ip> < mask> < gateway_ip>
Example:
router(config)# ip route 10.10.10.0 255.255.255.0 192.168.1.1
Step 2 Generate and register the necessary certificates for Cisco Unified Communications Manager and IOS.
The following certificates need to be imported from the Cisco Unified Communications Manager.
• CallManager - Authenticating the Cisco UCM during TLS handshake (Only required for
mixed-mode clusters)
• Cisco_Manufacturing_CA - Authenticating IP phones with a Manufacturer Installed Certificate
(MIC).
• CAPF - Authenticating IP phones with an LSC.
To import these Cisco Unified Communications Manager certificates
a. From the Cisco Unified Communications Manager OS Administration web page.
b. Choose Security > Certificate Management. (Note: This location may change based on the UCM
version)
c. Find the certificates Cisco_Manufacturing_CA and CAPF. Download the .pem file and save as .txt
file
d. Create trustpoint on the IOS
Example:
hostname(config)# crypto pki trustpoint trustpoint_name
hostname(config-ca-trustpoint)# enrollment terminal
hostname(config)# crypto pki authenticate trustpoint
When prompted for base 64 encoded CA Certificate, copy-paste the text in the downloaded
.pem file along with the BEGIN and END lines. Repeat the procedure for the other certificates
e. You should generate the following IOS self-signed certificates and register them with Cisco Unified
Communications Manager, or replace with a certificate that you import from a CA.
• Generate a self-signed certificate.
Example:
Router> enable
Router# configure terminal
Router(config)# crypto key generate rsa general-keys label <name> <exportable
-optional>
Router(config)# crypto pki trustpoint <name>
Router(ca-trustpoint)# enrollment selfsigned
Router(ca-trustpoint)# rsakeypair <name> 1024 1024
Router(ca-trustpoint)#authorization username subjectname commonname
Router(ca-trustpoint)# crypto pki enroll <name>
Router(ca-trustpoint)# end
• Generate a self-signed certificate with Host-id check enabled on the VPN profile in Cisco Unified
Communications Manager.
Example:
Router> enable
Router# configure terminal