為CUCM、IP電話和CUBE之間的SIP TLS和SRTP配置企業CA（第三方CA）簽名證書並對其進行故障排除

簡介

本檔案介紹使用企業憑證授權單位(CA)（第三方CA）簽署憑證以及在Cisco Unified Communications Manager(CUCM)、IP電話和Cisco Unified Border Element(CUBE)之間使用作業階段啟始通訊協定(SIP)傳輸層安全(TLS)和安全即時傳輸通訊協定(SRTP)以及使用通用企業CA為所有網路元件（包括Cisco Communications裝置，例如IP電話、CUCM、閘道器和CUBE）簽署憑證的組態範例。

必要條件

需求

思科建議您瞭解以下主題：

• 已配置企業CA伺服器
• CUCM集群在混合模式下配置，IP電話在安全模式下註冊（加密）
• CUBE基本語音服務VoIP和撥號對等體配置完成

採用元件

本文中的資訊係根據以下軟體和硬體版本：

• Windows 2008 server — 證書頒發機構
• CUCM 10.5
• CUBE — 採用Cisco IOS® 15.3(3)M3的3925E
• CIPC

本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路正在作用，請確保您已瞭解任何指令可能造成的影響。

背景資訊

CUBE上的安全語音通訊可分為兩部分

• 安全信令 — CUBE使用TLS保護通過SIP和網際網路協定安全(IPSec)的信令，以便通過H.323保護信令
• 安全媒體 — 安全即時傳輸通訊協定(SRTP)

CUCM證書頒發機構代理功能(CAPF)為電話提供本地有效證書(LSC)。因此，當CAPF由外部CA簽名時，它將充當電話的下級CA。

要瞭解如何獲取CA簽名的CAPF，請參閱：

設定

網路圖表

在此設定中，使用了根CA和一個從屬CA。所有CUCM和CUBE證書都由下屬CA簽名。

配置CUBE

生成RSA金鑰對。

此步驟生成私鑰和公鑰。

在此示例中，CUBE只是一個標籤，可以是任何內容。

CUBE-2(config)#crypto key generate rsa general-keys label CUBE modulus 2048
The name for the keys will be: CUBE
 
% The key modulus size is 2048 bits
% Generating 2048 bit RSA keys, keys will be non-exportable...
[OK] (elapsed time was 12 seconds)
 
CUBE-2(config)#

2.為下級CA和根CA建立信任點，下級CA信任點用於SIP TLS通訊。

在本例中，從屬CA的信任點名稱為SUBCA1，而根CA的信任點名稱為ROOT。

enrollment terminal pem allow manual cut-and-paste certificate enrollment. pem keyword is used to issue certificate requests or receive issued certificates in PEM-formatted files through the console terminal.

此步驟中使用的主題名稱必須與CUCM SIP中繼安全配置檔案的X.509主題名稱匹配。最佳做法是將主機名與域名一起使用（如果啟用了域名）。

關聯在步驟1中建立的RSA金鑰對。

crypto pki trustpoint SUBCA1
enrollment terminal pem
serial-number none
ip-address none
subject-name CN=CUBE-2
revocation-check none
rsakeypair CUBE
 
crypto pki trustpoint ROOT
enrollment terminal
revocation-check none

3.生成CUBE證書簽名請求(CSR)。

crypto pki enroll命令生成提供給企業CA的CSR，以便獲取已簽名的證書。

CUBE-2(config)#crypto pki enroll SUBCA1
% Start certificate enrollment ..
 
% The subject name in the certificate will include: CN=CUBE-2
% The subject name in the certificate will include: CUBE-2
Display Certificate Request to terminal? [yes/no]: yes
Certificate Request follows:
 
-----BEGIN CERTIFICATE REQUEST-----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-----END CERTIFICATE REQUEST-----
 
---End - This line not part of the certificate request---
 
Redisplay enrollment request? [yes/no]: no
CUBE-2(config)#
 

在BEGIN CERTIFICATE REQUEST到END CERTIFICATE REQUEST之間複製輸出，並將其儲存在記事本檔案中。

CUBE CSR具有以下關鍵屬性：

  

 Attributes:
 Requested Extensions:
   X509v3 Key Usage: critical
      Digital Signature, Key Encipherment

 4.  從從屬CA獲取CA證書根CA，然後獲取CA證書和簽名的CUBE證書。

若要取得簽名的多維資料集憑證，請使用步驟3中產生的CSR。映像來自Microsoft CA Web伺服器。

5.匯入根CA和從屬CA的CA證書。

在記事本中開啟證書，然後從BEGIN CERTIFICATE REQUEST到END CERTIFICATE REQUEST複製貼上內容。

CUBE-2(config)#crypto pki authenticate SUBCA1
 
Enter the base 64 encoded CA certificate.
End with a blank line or the word "quit" on a line by itself
 
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
 
Trustpoint 'SUBCA1' is a subordinate CA and holds a non self signed cert
Certificate has the following attributes:
 Fingerprint MD5: C420B7BB 88A2545F E26B0875 37D9EB45
 Fingerprint SHA1: 110AF87E 53E6D1C2 19404BA5 0149C5CA 2CF2BE1C
 
% Do you accept this certificate? [yes/no]: yes
Trustpoint CA certificate accepted.
% Certificate successfully imported
 
CUBE-2(config)#
CUBE-2(config)#crypto pki authenticate ROOT
 
Enter the base 64 encoded CA certificate.
End with a blank line or the word "quit" on a line by itself
 
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
 
Certificate has the following attributes:
 Fingerprint MD5: 511E1008 6D315E03 4B748601 7EE1A0E5
 Fingerprint SHA1: 8C35D9FA 8F7A00AC 0AA2FCA8 AAC22D5F D08790BB
 
% Do you accept this certificate? [yes/no]: yes
Trustpoint CA certificate accepted.
% Certificate successfully imported
 
CUBE-2(config)#

6.匯入CUBE簽名證書。

在記事本中開啟證書，然後從BEGIN CERTIFICATE REQUEST到END CERTIFICATE REQUEST複製貼上內容。

CUBE-2(config)#crypto pki import SUBCA1 certificate

Enter the base 64 encoded certificate.
End with a blank line or the word "quit" on a line by itself

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

% Router Certificate successfully imported

CUBE-2(config)#

7.將TCP TLS配置為傳輸協定。

這可以在全域性級別或撥號對等級別上完成。

  

 voice service voip
  sip
   session transport tcp tls

8.為sip-ua分配信任點，此信任點將用於CUBE和CUCM之間的所有sip信令：

 sip-ua
 crypto signaling remote-addr <cucm pub ip address> 255.255.255.255 trustpoint SUBCA1
 crypto signaling remote-addr <cucm sub ip address> 255.255.255.255 trustpoint SUBCA1

  或者，可以為來自多維資料集的所有sip信令配置預設信任點：

 sip-ua
 crypto signaling default trustpoint SUBCA1

9.啟用SRTP。

這可以在全域性級別或撥號對等級別上完成。

Voice service voip
srtp fallback 

10.對於SRTP和即時傳輸協定(RTP)網際網路，需要安全的轉碼器。

如果Cisco IOS®版本為15.2.2T(CUBE 9.0)或更新版本，則可設定本機轉碼介面(LTI)轉碼器以最小化設定。

LTI轉碼器無需為SRTP-RTP呼叫配置公共金鑰基礎設施(PKI)信任點。

 dspfarm profile 1 transcode universal security
 codec g711ulaw
 codec g711alaw
 codec g729ar8
 codec g729abr8
 maximum sessions 10
 associate application CUBE

如果Cisco IOS®低於15.2.2T，則配置SCCP轉碼器。

SCCP轉碼器需要用於信令的信任點，然而，如果使用相同的路由器來託管轉碼器，則相同的信任點(SUBCA1)可用於CUBE以及轉碼器。

sccp local GigabitEthernet0/2
 sccp ccm 10.106.95.153 identifier 1 priority 1 version 7.0
 sccp
 !
 sccp ccm group 1
 bind interface GigabitEthernet0/0
 associate ccm 1 priority 1
 associate profile 2 register secxcode
 !
 dspfarm profile 2 transcode universal security
 trustpoint SUBCA1
 codec g711ulaw
 codec g711alaw
 codec g729ar8
 codec g729abr8
 maximum sessions 10
 associate application SCCP
 
 telephony-service
 secure-signaling trustpoint SUBCA1
 sdspfarm units 1
 sdspfarm transcode sessions 10
 sdspfarm tag 1 secxcode
 max-ephones 1
 max-dn 1
 ip source-address 10.106.95.153 port 2000
 max-conferences 8 gain -6
 transfer-system full-consult

配置CUCM

1.在所有CUCM節點上生成CallManager CSR。

導覽至CM OS Administration > Security > Certificate Management > Generate Certificate Signing Request，如下圖所示。

CallManager CSR具有以下關鍵屬性：

Requested Extensions:
 X509v3 Extended Key Usage:
   TLS Web Server Authentication, TLS Web Client Authentication, IPSec End System
 X509v3 Key Usage:
   Digital Signature, Key Encipherment, Data Encipherment, Key Agreement
 

2.獲取由從屬CA簽名的所有CM節點的CallManager證書。

使用在步驟1中生成的CSR。任何Web伺服器證書模板都會起作用，請確保簽名證書至少具有以下金鑰使用屬性：數位簽章、金鑰加密、數據加密，如圖所示。

3.將CA證書從根CA和從屬CA上傳為CallManager-Trust。

導覽至CM OS Administration > Security > Certificate Management > Upload Certificate/Certificate chain，如下圖所示。

4.將CallManager簽名證書上傳為CallManager，如下圖所示。

5.在Publisher（通過CLI）上更新證書信任清單(CTL)檔案。

admin:utils ctl update CTLFile
This operation will update the CTLFile. Do you want to continue? (y/n):
 
Updating CTL file
CTL file Updated
Please Restart the TFTP and Cisco CallManager services on all nodes in the cluster that run these services
admin:
  

6.  在所有節點上重新啟動CallManager和TFTP服務，並在發佈伺服器上重新啟動CAPF服務。

7.建立新的SIP中繼安全配置檔案。

  

在CM管理中，導航到System > Security > SIP Trunk Security Profiles > Find。

複製現有非安全SIP中繼配置檔案以建立新的安全配置檔案，如下圖所示。

8.  建立到CUBE的SIP中繼。

在SIP中繼上啟用SRTP Allowed，如下圖所示。

如圖所示，在SIP中繼上配置目標埠5061(TLS)並應用新的安全SIP中繼安全配置檔案。

驗證

  

使用本節內容，確認您的組態是否正常運作。

show sip-ua connections tcp tls detail
show call active voice brief
 
e.g.
 
Secure-CUBE#show sip-ua connections tcp tls detail
Total active connections : 2
No. of send failures : 0
No. of remote closures : 13
No. of conn. failures : 0
No. of inactive conn. ageouts : 0
TLS client handshake failures : 0
TLS server handshake failures : 0
 
---------Printing Detailed Connection Report---------
Note:
** Tuples with no matching socket entry
 - Do 'clear sip <tcp[tls]/udp> conn t ipv4:<addr>:<port>'
 to overcome this error condition
++ Tuples with mismatched address/port entry
 - Do 'clear sip <tcp[tls]/udp> conn t ipv4:<addr>:<port> id <connid>'
 to overcome this error condition
 
Remote-Agent:10.106.95.151, Connections-Count:2
Remote-Port Conn-Id Conn-State WriteQ-Size Local-Address
=========== ======= =========== =========== ===========
 5061        16    Established          0 10.106.95.153
 57396       17    Established          0 10.106.95.153
 
 
-------------- SIP Transport Layer Listen Sockets ---------------
Conn-Id          Local-Address
===========     =============================
 2              [10.106.95.153]:5061

使用LTI轉碼器時，會擷取show call active voice brief 指令的輸出。

Telephony call-legs: 0
SIP call-legs: 2
H323 call-legs: 0
Call agent controlled call-legs: 0
SCCP call-legs: 0
Multicast call-legs: 0
Total call-legs: 2
1283 : 33 357052840ms.1 (23:57:23.929 IST Sun Feb 15 2015) +2270 pid:3 Answer 3001 active
dur 00:00:08 tx:383/61280 rx:371/59360 dscp:0 media:0 audio tos:0xB8 video tos:0x0
IP 10.106.95.132:17172 SRTP: off rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g711ulaw TextRelay: off Transcoded: Yes
media inactive detected:n media contrl rcvd:n/a timestamp:n/a
long duration call detected:n long duration call duration:n/a timestamp:n/a
LostPacketRate:0.00 OutOfOrderRate:0.00
 
1283 : 34 357052840ms.2 (23:57:23.929 IST Sun Feb 15 2015) +2270 pid:1 Originate 2001 active
dur 00:00:08 tx:371/60844 rx:383/62812 dscp:0 media:0 audio tos:0xB8 video tos:0x0
IP 10.65.58.24:24584 SRTP: on rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g711ulaw TextRelay: off Transcoded: Yes
media inactive detected:n media contrl rcvd:n/a timestamp:n/a
long duration call detected:n long duration call duration:n/a timestamp:n/a
LostPacketRate:0.00 OutOfOrderRate:0.00

此外，當Cisco IP電話與CUBE或網關之間進行SRTP加密呼叫時，IP電話上會顯示一個鎖圖示。

疑難排解

  

本節提供的資訊可用於對組態進行疑難排解。

這些調試有助於排除PKI/TLS/SIP/SRTP問題。

debug crypto pki{ API | callbacks | messages | scep | server | transactions | validation }
debug ssl openssl { errors | ext | msg | states }
debug srtp {api | events }
debug ccsip {messages | error | events | states | all }
debug voip ccapi inout