A Realization Method of Voice over IP System Passing Through Firewall and Its Implementation

  • Masashi Ito
  • Akira Watanabe
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3961)


In recent years, IP telephone has achieved remarkable progress on the Internet through "low price ", "continuous connection", and "high speed communication band". However, it is not easy to use IP telephone over firewall and NAT because of its restrictions of the communication. We have proposed the system called SoFW (SIP over Firewall) that suppresses the problem. In this paper, detailed functions and its implementation method of SoFW are described.


Session Initiation Protocol Port Number Correspondent Node Voice Communication Network Address Translator 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. 1.
    Freed, N.: Behavior of and Requirements for Internet Firewalls, IETF RFC 2979 (200.10)Google Scholar
  2. 2.
    H.323, Packe Based Multimedia Communications Systems, ITU-T Recommendation (1998) Google Scholar
  3. 3.
    Handley, M., Schulzrinne, H., Schooler, E., Rosenberg, J.: SIP : Session Initiation Protocol, RFC2543 (1999)Google Scholar
  4. 4.
    Rosenberg, J., et al.: SIP: Session Initiation Protocol IETF RFC3261 (2002.6)Google Scholar
  5. 5.
    Koskelainen, P., Schulzrinnc, H., Wu, X.: VoIP: A SIP-based conference control framework, pp. 53–61. ACM press, New York (2002.5)Google Scholar
  6. 6.
    Bcrgcr, S., Schulzrinnc, H., Sidiroglou, S., Wu, X.: Conferencing: Ubiquitous computing using SIP, pp. 82–89. ACM press, New York (2003.6)Google Scholar
  7. 7.
    Egevang, K., Francis, P.: The IP Network Address Translator (NAT), IETF RFC 1631 (1994.5)Google Scholar
  8. 8.
    Kunai, S.: Allround Internet Telephony Protocol -HTTP-based Conference Application Protocol, IPSJ –JNK4403007Google Scholar
  9. 9.
  10. 10.
  11. 11.
    Handley, M., Jacobson, V.: SDP : Session Description Protocol, IEETF RFC2327(1998)Google Scholar
  12. 12.

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Masashi Ito
    • 1
  • Akira Watanabe
    • 1
  1. 1.Graduate School of Science and TechnologyMeijo UniversityJapan

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