Cisco Bug: CSCta73054 - NAT VRF Breaks Passive FTP Sessions.
Jan 24, 2017
- Cisco IOS
Known Affected Releases
12.2(31)SB14 12.2(33)SB5 12.2(33)SRC5 12.2(33)XNE 12.2(33)XNF
Symptoms: When using passive FTP with NAT VRF, the connection is broken after NAT in the Cisco 7300. The port numbers are not consistent. The source port is translated from "X_PORT" to "Y_PORT", but after NAT to the outside, the port still remains the same. This breaks the passive FTP session. Conditions: This issue is observed when using Cisco IOS Releases 12.2(31)SB11, 12.2(31)SB14, 12.2(33)SB3a and 12.2(33)SB5 when using VRF NAT and trying to establish passive FTP connections across the Cisco 7300.
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