The vsftpd behind NAT using 'pasv_address' option.
Issue
- When we use "pasv_address=external-server-IP" in the vsftpd.conf file then switching to PASV mode in the FTP client leads to immediate connection reset. This behaviour is not observed when we assign to pasv_address "pasv_address=internal-server-IP" or "pasv_address=internal-server-IP external-server-IP".
Environment
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- vsftpd
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