Contents

Introduction

Prerequisites

Requirements

Components Used

Configure

Verify

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:

- VG224

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