PM40347: SIP (SESSION INITIATION PROTOCOL) SUPPORT FOR RFC 5626 ("OUTBOUND")

APAR status

• Closed as program error.

Error description

• This APAR addresses a new feature added to Websphere Application
  Server, to support the Session Initiation Protocol (SIP)
  "outbound" protocol extension, as described in RFC 5626.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Session Initiation Protocol (SIP) users     *
  *                  of IBM WebSphere Application Server         *
  *                  Feature Pack for Communications Enabled     *
  *                  Applications (CEA)                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: Connectivity issues against clients     *
  *                      that reside behind a Network Address    *
  *                      Translator or a firewall.               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Some connectivity problems in SIP relate to clients that
  reside behind a NAT (Network Address Translator) or a
  firewall. Typically, such networks allow clients to send
  messages to the server, but prevent the server from sending
  messages back to the client. These problems, and their
  standardized solutions, are described in RFC 3581 - "An
  Extension to the Session Initiation Protocol (SIP) for
  Symmetric Response Routing", and RFC 5626 - "Managing
  Client-Initiated Connections in the Session Initiation
  Protocol (SIP)".
  

Problem conclusion

• The problem is fixed by implementing RFC 5626 ("outbound") and
  RFC 3581 ("rport"). With this new feature, the SIP (Session
  Initiation Protocol) container supports the "outbound" and
  "rport" protocol extensions at the server side. Clients that
  reside behind a NAT (Network Address Translator) or a
  firewall, will be able to traverse the firewall and
  communicate with the server, by implementing the same protocol
  extensions at the client side.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 1.0.1.11 for the Feature Pack for Communications
  Enabled Applications. Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

• Fix error, see PM66054
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

  PM26314

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  CEA FEATUREPACK

• Fixed component ID

  5724J0855

Applicable component levels

• R700 PSY

     UP