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Cisco Bug: CSCur31425 - ASRNAT: PPTP ALG: Incorrect UNNAT of Peer-Call-ID in Outgoing-Call-Reply

Last Modified

Nov 27, 2020

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.3(3)S3 15.4(2)S 15.4(3)SS

Description (partial)

ASR1k PAT may not function properly for PPTP. PPTP control connection is not established.

This was first found in XE3.10.3. The sequence of events which can lead to this failure:

- PPTP ALG is disabled;
- PPTP clients try to connect, but fail;
- PPTP ALG is enabled with "ip nat service pptp";
- PPTP clients are still unable to connect to PPTP server.
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