방화벽 에서 정책 허용해 주었는데 외부에서 접속이 되지 않습니다.

방화벽에서 ftp와 ssh 허용했는데 외부에서 접속이 안됩니다.

로그를 확인했더니 이렇게 나옵니다.

고수님들의 도움 부탁드리겠습니다.

서버에도 차단된 IP 항목에는 들어가 있지 않습니다.

May 18 03:01:11 SERVER6-90 proftpd[3085]: SERVER6-90 (203.236.3.225[203.236.3.225]) - Passive data transfer failed, possibly due to network issues
May 18 03:01:11 SERVER6-90 proftpd[3085]: SERVER6-90 (203.236.3.225[203.236.3.225]) - Check your PassivePorts and MasqueradeAddress settings,
May 18 03:01:11 SERVER6-90 proftpd[3085]: SERVER6-90 (203.236.3.225[203.236.3.225]) - and any router, NAT, and firewall rules in the network path.
May 18 03:01:11 SERVER6-90 proftpd[3085]: SERVER6-90 (203.236.3.225[203.236.3.225]) - FTP no transfer timeout, disconnected
May 18 03:01:11 SERVER6-90 proftpd[3085]: SERVER6-90 (203.236.3.225[203.236.3.225]) - FTP session closed.
May 18 03:05:53 SERVER6-90 proftpd[3096]: SERVER6-90 (203.236.3.225[203.236.3.225]) - Passive data transfer failed, possibly due to network issues
May 18 03:05:53 SERVER6-90 proftpd[3096]: SERVER6-90 (203.236.3.225[203.236.3.225]) - Check your PassivePorts and MasqueradeAddress settings,
May 18 03:05:53 SERVER6-90 proftpd[3096]: SERVER6-90 (203.236.3.225[203.236.3.225]) - and any router, NAT, and firewall rules in the network path.
May 18 03:05:53 SERVER6-90 proftpd[3096]: SERVER6-90 (203.236.3.225[203.236.3.225]) - FTP no transfer timeout, disconnected
May 18 03:05:53 SERVER6-90 proftpd[3096]: SERVER6-90 (203.236.3.225[203.236.3.225]) - FTP session closed.