隨著VoIP(Voice over IP)的盛行，使用者之間除了電子郵件當作彼此通訊的
方式之外，也漸漸的採用網路電話作為管道，以往電子郵件一直成為廣告商行
銷、詐騙…等傳播方式，而隨著網路電話的盛行，這些垃圾資訊將利用網路電話，
對用戶進行騷擾，SPIT(Spam for Internet Telephony)也即將成為一個網路上的嚴
重問題，所帶來的影響更甚於垃圾郵件。
有鑑於此，本論文設計與實作一個具備來電過濾功能的SIP 終端設備，在有
限的硬體資源中，藉由黑白名單的過濾機制，與後端SPIT 資料庫整合，設計出
一套有效的SPIT 過濾系統，經由這套機制，能有效阻擋垃圾電話，確保VoIP
的服務品質。

With the popularity of the VoIP, the method of communication is gradually
changing from email to internet telephony. The email communication is always being
used for advertising and phishing. Also, this junk information may be used for internet
telephony and may disturb users while the internet telephony becomes more and more
popular. SPIT (Spam for Internet Telephony)may become a serious problem in the
network. Moreover, the influence cause by internet telephony maybe more serious
than email.
Hence, this paper wants to provide a SIP terminal that can filter the caller. With
limited resources, the filter uses white and black lists and integrated with back-end
SPIT database to design an efficient SPIT filter. Through this filter, we can block the
spam call efficiently and keep the quality of the VoIP service.

中文摘要....................................................................................................................... I
ABSTRACT.................................................................................................................II
目次............................................................................................................................. III
表目錄........................................................................................................................ VI
圖目錄.......................................................................................................................VII
CHAPTER 1 導論.......................................................................................................1
1.1 動機與目的.........................................................................................................1
1.2 論文架構.............................................................................................................1
CHAPTER 2 相關研究...............................................................................................2
2.1 網路電話介紹.....................................................................................................2
2.2 VOIP 通訊協定....................................................................................................3
2.3 SIP 簡介...............................................................................................................4
2.4 SIP 元件...............................................................................................................4
2.4.1 客戶端..........................................................................................................4
2.4.2 伺服器端......................................................................................................5
2.5 SIP 訊息...............................................................................................................7
2.5.1 SIP 請求訊息................................................................................................7
2.5.2 SIP 回應訊息................................................................................................7
2.6 OPENSER 介紹.....................................................................................................9
2.6.1 OpenSER module ..........................................................................................9
2.6.2 openser.cfg ..................................................................................................10
2.7 垃圾郵件過濾機制研究...................................................................................12
2.7.1 依據用戶端判別垃圾郵件........................................................................12
2.7.2 依據內容判斷垃圾郵件............................................................................13
2.8 SIP AND SPAM (RFC 5039) 剖析與介紹............................................................13
2.8.1 Content Filtering.........................................................................................14
2.8.2 Black Lists...................................................................................................14
2.8.3 Payment.......................................................................................................15
CHAPTER 3 系統架構.............................................................................................17
3.1 VOIP GATEWAY 介紹..........................................................................................17
3.2 硬體架構...........................................................................................................17
3.3 軟體架構...........................................................................................................21
3.3.1 SIP UA ........................................................................................................21
3.3.2 WEB UI .......................................................................................................24
CHAPTER 4 方法與實作.........................................................................................26
4.1 WHITELISTS ........................................................................................................26
4.1.1 架構............................................................................................................26
4.1.2 程式流程....................................................................................................28
4.1.3 whitelist 設定 – webs................................................................................29
4.1.4 SPEEDDIAL ...............................................................................................32
4.2 BLACKLISTS ........................................................................................................34
4.2.1 架構............................................................................................................34
4.2.2 Blacklists Server..........................................................................................36
4.2.3 OpenSER Module........................................................................................40
4.2.4 Web User Interface......................................................................................44
CHAPTER 5 結論.....................................................................................................47
參考文獻.....................................................................................................................48

[1] S. Donovan, “The SIP INFO Method”, RFC 2976, October 2000.
[2] R. Dantu and P. Kolan, “Detecting Spam in VoIP Networks”, in Globecom,
December 2004.
[3] G. Gonzalez-Talavan, “A simple, configurable SMTP anti-spam filter:
Greylists,” in Computers and Security, vol. 25, 2006, pp. 229–236, February
2006.
[4] M. Handley, V. Jacobson, “SDP: Session Description Protocol”, RFC-2327,
April 1998.
[5] M. Handley, H. Schulzrinne, E. Schooler and J.Rosenberg, "SIP: Session
Initiation Protocol", RFC 2543, March 1999.
[6] A. Madhosingh, “The Design of a Differentiated Session Initiation Protocol
to Control VoIP Spam”, Master’s thesis, Florida State University, 2006.
[7] Y. Rebahi, D. Dorgham, T. Magedanz, "SIP Spam Detection", International
Conference on Digital Telecommunications 2006 (ICDT '06), pp.68 – 68,
2006.
[8] Y. Rebahi, D. Sisalem, "SIP Service Providers and the Spam Problem",
Proceedings of the 2th Workshop on Securing VoIP, Washington, June 2005.
[9] J. Rosenberg and C. Jennings, "The Session Initiation Protocol (SIP) and
Spam", RFC 5039, January 2008.
[10] J. Rosenberg, H. Schulzrinne, “Reliability of Provisional Responses in the
Session Initiation Protocol (SIP)”, RFC 3262, June 2002.
[11] J. Rosenberg and H. Schulzrinne, "Session Initiation Protocol (SIP):
Locating SIP Servers", RFC 3263, June 2002.
[12] J. Rosenberg, H. Schulzrinne,G. Camarillo, A. Johnston, J. Peterson,R.
Sparks, M. Handley and E. Schooler, "SIP:Session Initiation Protocol",
RFC 3261, June 2002.
[13] R. Sparks, “The Session Initiation Protocol (SIP) Refer Method”,
RFC-3515, April 2003.
[14] “ADM-5120 Data Sheet Rev. 1.1”, Infineon Technologies., March 2005.
[15] “ADM-5120 HOME GATEWAY CONTROLLER”, AMDtek Inc.,2003.
[16] “ EASY 5120 2-Channel VoIP Router Reference Package Hardware
Description”, Infineon Technologies.
[17] “EASY 5120P-ATA Fxo System Description”, Infineon Technologies, Jul.
2004.
[18] “Telephony Application Programming Interface for Infineon Voice Codec
Devices”, Infineon Technologies.
[19] “ VINETIC-2CPE System Description, v1.1”, Infineon Technologies.
March 2006.
[20] “VINETIC-2CPE Device Driver and API Description, v2.1”, Infineon
Technologies. Jan. 2006.
[21] The Open Source SIP Server , http://www.openser.org/
[22] The GNU oSIP library (http://www.gnu.org/software/osip/)
[23] The eXtended osip library (http://savannah.nongnu.org/projects/exosip)