Introduction
This document describes secure encrypted configuration Signalling Connection Control Part (SCCP) on VG224 Analog Gateway.
Prerequisites
Requirements
Cisco recommends that you have knowledge of these topics:
- SCCP
- VG224
- Cisco Unified Communications Manager (CUCM)
Components Used
The information in this document is based on these software versions:
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, ensure that you understand the potential impact of any command.
Configure
Step 1. Copy the callmanager.pem certificate to the VG224 (referenced as SECURE trustpoint in the below configuration)
Step 2. Create a self signed certificate on the VG224 with the MAC address of FastEthernet0/0 (bind interface) with only the last 10 digits as the subject-name.
Step 3. Copy the vg-cert to CUCM as a call-manager trust and restart CUCM.
The information is provided for configuration of certificates that are required for VG224.
Router(config)#crypto key generate rsa general-keys label vg modulus 1024
Router(config)#crypto pki trustpoint vg
Router(ca-trustpoint)#enrollment selfsigned
serial-number none
fqdn none
ip-address none
subject-name cn=1A:E2:85:7B:E2 <----- Last 10 DIGITS ONLY of the SCCP bind interface. Formatting EXACTLY as shown with colons.
rsakeypair vg
crypto pki enroll vg
Router(config)#crypto pki export vg_cert pem terminal
Tip: Command Reference Guide
Note: You will not see a lock icon when calling from a secure VG224 analog phone to a secure IP phone due to caveat CSCti08882
Verify
This information is for verfication for successfull registration of VG224
Router#show sccp
SCCP Admin State: UP
Gateway Local Interface: FastEthernet0/0
IPv4 Address: 14.1.97.95
Port Number: 2000
IP Precedence: 5
User Masked Codec list: None
Call Manager: 172.18.172.204, Port Number: 2000
Priority: N/A, Version: 7.0, Identifier: 1
Trustpoint: N/A
Call Manager: 172.18.172.205, Port Number: 2000
Priority: N/A, Version: 7.0, Identifier: 2
Trustpoint: N/A
Call Manager: 172.18.172.206, Port Number: 2000
Priority: N/A, Version: 7.0, Identifier: 3
Trustpoint: N/A
AutoCfg_Virtual_Endpoint Oper State: ACTIVE - Cause Code: NONE
Active Call Manager: 172.18.172.204, Port Number: 2000
TCP Link Status: CONNECTED, Device Name: AN1AE2857BE2FFF
Reported Max Streams: 0, Reported Max OOS Streams: 0
Supported Codec: g711ulaw, Maximum Packetization Period: 20
Alg_Phone Oper State: ACTIVE - Cause Code: NONE
Active Call Manager: 172.18.172.204, Port Number: 2443
TCP Link Status: CONNECTED, Device Name: AN1AE2857BE2400
Security
Signaling Security: ENCRYPTED TLS
Media Security: SRTP
Supported crypto suites :AES_CM_128_HMAC_SHA1_32
Reported Max Streams: 1, Reported Max OOS Streams: 0
Supported Codec: rfc2833 dtmf, Maximum Packetization Period: 30
Supported Codec: g711ulaw, Maximum Packetization Period: 20
Supported Codec: g711alaw, Maximum Packetization Period: 20
Supported Codec: g729r8, Maximum Packetization Period: 220
Supported Codec: g729ar8, Maximum Packetization Period: 220
Supported Codec: g729br8, Maximum Packetization Period: 220
Supported Codec: g729r8, Maximum Packetization Period: 220
Supported Codec: ilbc, Maximum Packetization Period: 120
TLS : ENABLED
This shows that secure VG224 using SCCP IOS configuration.
Building configuration...
Current configuration : 5258 bytes
!
version 15.1
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot system slot0:vg224-i6k9s-mz.151-4.M3
boot-end-marker
!
!
enable secret 5 $1$f99B$PWPClPrUNzgsUZEO8aBYG.
!
no aaa new-model
crypto pki token default removal timeout 0
!
crypto pki trustpoint SECURE
enrollment terminal
revocation-check crl
!
crypto pki trustpoint vg
enrollment selfsigned
serial-number none
fqdn none
ip-address none
subject-name cn=1A:E2:85:7B:E24 ( instead of this command, we can use hiddle command "mac-address Fast Ethernet0/0 as well )
revocation-check crl
rsakeypair AN1AE2857BE2400
!
!
crypto pki certificate chain SECURE
certificate ca 588C9B7C2D4B37F03930E8C926D02A18
<truncated>
crypto pki certificate chain vg
certificate self-signed 03
<truncated>
ip source-route
!
ip cef
ip name-server 172.18.108.43
ip name-server 172.18.108.34
!
!
no ipv6 cef
!
stcapp ccm-group 1
stcapp security trustpoint vg
stcapp security mode encrypted
stcapp
!
stcapp feature access-code
!
stcapp feature speed-dial
!
!
!
stcapp supplementary-services
port 2/0
fallback-dn 862224
!
!
!
!
!
!
!
!
!
voice-card 0
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
ip address dhcp
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
!
ip forward-protocol nd
!
ip http server
no ip http secure-server
ip route 0.0.0.0 0.0.0.0 14.1.97.1 254
ip route 0.0.0.0 0.0.0.0 14.1.97.1 254
!
!
!
control-plane
!
!
voice-port 2/0
timeouts initial 60
timeouts interdigit 60
timeouts ringing infinity
!
voice-port 2/1
!
<truncated>
!
voice-port 2/23
!
ccm-manager config server 172.18.172.204
ccm-manager config
ccm-manager sccp local FastEthernet0/0
ccm-manager sccp
!
!
mgcp profile default
!
sccp local FastEthernet0/0
sccp ccm 172.18.172.204 identifier 1 version 7.0
sccp ccm 172.18.172.205 identifier 2 version 7.0
sccp ccm 172.18.172.206 identifier 3 version 7.0
sccp
!
sccp ccm group 1
associate ccm 1 priority 1
associate ccm 2 priority 2
associate ccm 3 priority 3
!
dial-peer voice 999200 pots
service stcapp
securiy mode encrypted =====> Required command
port 2/0
!
dial-peer voice 99920 pots
! service stcapp
securiy mode encrypted =====> Required command
port 2/1
!
!(configure all ports in same secure mode)
!
line con 0
line aux 0
line vty 0 4
password ww
login
transport input all
!
ntp server 172.18.108.15
end
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