vsftpd를 사용하여 포트 21을 활성화하는 방법

포트 22를 사용하여 FTP 서버에 연결할 수 있습니다. 그런데 포트 21이 활성화되지 않은 것 같아요. :

오류: 20초 동안 활동이 없으면 연결 시간이 초과되었습니다. 오류: 서버에 연결할 수 없습니다.

UFW 상태

Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
20/tcp                     ALLOW       Anywhere
21/tcp                     ALLOW       Anywhere
990/tcp                    ALLOW       Anywhere
40000:50000/tcp            ALLOW       Anywhere
OpenSSH (v6)               ALLOW       Anywhere (v6)
20/tcp (v6)                ALLOW       Anywhere (v6)
21/tcp (v6)                ALLOW       Anywhere (v6)
990/tcp (v6)               ALLOW       Anywhere (v6)
40000:50000/tcp (v6)       ALLOW       Anywhere (v6)

내 vsftpd.config:

listen=YES

listen_ipv6=YES

local_enable=YES
write_enable=NO
dirmessage_enable=YES
use_localtime=YES
xferlog_enable=YES
connect_from_port_20=YES
chroot_local_user=YES
chroot_local_user=YES
secure_chroot_dir=/var/run/vsftpd/empty
pam_service_name=vsftpd
rsa_cert_file=/etc/ssl/private/vsftpd.pem
rsa_private_key_file=/etc/ssl/private/vsftpd.pem
ssl_enable=YES
allow_anon_ssl=NO
force_local_data_ssl=YES
force_local_logins_ssl=YES
ssl_tlsv1=YES
ssl_sslv2=NO
ssl_sslv3=NO
require_ssl_reuse=NO
ssl_ciphers=HIGH
user_sub_token=$USER local_root=/home/$USER/ftp
pasv_min_port=40000 pasv_max_port=50000
userlist_enable=YES userlist_file=/etc/vsftpd.userlist userlist_deny=NO

#netstat -lntu

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp6       0      0 :::22                   :::*                    LISTEN
udp        0      0 127.0.0.53:53           0.0.0.0:*

네트워크 통계 출력:

#netstat -pant | grep 21

tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN      299540/vsftpd
tcp        0      0 ****:22       *****:52150    ESTABLISHED 299854/sshd: unknow

vsftpd 상태:

# systemctl status vsftpd
● vsftpd.service - vsftpd FTP server
     Loaded: loaded (/lib/systemd/system/vsftpd.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2023-03-30 13:27:34 UTC; 53s ago
    Process: 299078 ExecStartPre=/bin/mkdir -p /var/run/vsftpd/empty (code=exited, status=0/SUCCESS)
   Main PID: 299082 (vsftpd)
      Tasks: 1 (limit: 4575)
     Memory: 916.0K
     CGroup: /system.slice/vsftpd.service
             └─299082 /usr/sbin/vsftpd /etc/vsftpd.conf