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Cisco Bug: CSCuq93934 - VCS/Expressway should not record-route with a static NAT address when se

Last Modified

Sep 17, 2019

Products (3)

  • Cisco TelePresence Video Communication Server (VCS)
  • Cisco TelePresence Video Communication Server Model
  • Cisco Expressway

Known Affected Releases


Description (partial)

Call go through Expressway-Edge (or VCS-Expressway) traversal proxy service and B2BUA (forced encrypted) with NATed interface, call may terminate when Endpoint send FUR message (or other mid-dialogue message)

The B2BUA will try to establish TCP session between Local IP address of external facing interface and own NATed same address. If firewall doesn't allow the NAT reflection, fail to process the mid-dialogue message and Expressway will terminate the call.
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