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CSCsi27512 Bug Details
| FTP with multiline 221 lines closes the connection too early | |
| Symptom: FTP client / server do not close their connection in some cases when the server uses multiline 221 closure sequence. Conditions: When some OS is used (not all of them, not identified properly) and the server uses multi line 221 closure sequence like: 221-You have transferred 0 bytes in 0 files. 221-Total traffic for this session was 2551 bytes in 1 transfers. 221-Thank you for using the FTP service on orbi. 221 Goodbye. instead of the classic 221 Goodbye; Workaround: 1. Disable ftp inspection OR disable 221 mutliline. or 2. if running a version of FWSM code where the command is supported, you can disable the TCP Normalizer feature which has minimal impact. Disable the normalizer with the command: "no control-point tcp-normalizer" or 3. If running in an active/standby failover mode setup, a forced switchover should alleviate the problem. If not running a failover mode that is if there i no failover pair, but have failover enabled, then a "no failover" and "failover" [i.e disabling and enabling failover] should help. | |
