Porta FTP chiusa per il servizio vsftpd

Ho aperto la port 21 usando il firewall iptables ma quando eseguo nmap sul server visualizza la port ftp è chiusa. Ho riavviato il servizio vsftpd su linux ma senza alcun risultato.

Di seguito è il file vsftpd.conf:

# Example config file /etc/vsftpd/vsftpd.conf # # The default compiled in settings are fairly paranoid. This sample file # loosens things up a bit, to make the ftp daemon more usable. # Please see vsftpd.conf.5 for all compiled in defaults. # # READ THIS: This example file is NOT an exhaustive list of vsftpd options. # Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's # capabilities. # # Allow anonymous FTP? (Beware - allowed by default if you comment this out). anonymous_enable=NO # # Uncomment this to allow local users to log in. local_enable=YES # # Uncomment this to enable any form of FTP write command. write_enable=YES # # Default umask for local users is 077. You may wish to change this to 022, # if your users expect that (022 is used by most other ftpd's) local_umask=022 # # Uncomment this to allow the anonymous FTP user to upload files. This only # has an effect if the above global write enable is activated. Also, you will # obviously need to create a directory writable by the FTP user. #anon_upload_enable=YES # # Uncomment this if you want the anonymous FTP user to be able to create # new directories. #anon_mkdir_write_enable=YES # # Activate directory messages - messages given to remote users when they # go into a certain directory. dirmessage_enable=YES # # The target log file can be vsftpd_log_file or xferlog_file. # This depends on setting xferlog_std_format parameter xferlog_enable=YES # # Make sure PORT transfer connections originate from port 20 (ftp-data). connect_from_port_20=YES # # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! #chown_uploads=YES #chown_username=whoever # # The name of log file when xferlog_enable=YES and xferlog_std_format=YES # WARNING - changing this filename affects /etc/logrotate.d/vsftpd.log #xferlog_file=/var/log/xferlog # # Switches between logging into vsftpd_log_file and xferlog_file files. # NO writes to vsftpd_log_file, YES to xferlog_file xferlog_std_format=YES # # You may change the default value for timing out an idle session. #idle_session_timeout=600 # # You may change the default value for timing out a data connection. #data_connection_timeout=120 # # It is recommended that you define on your system a unique user which the # ftp server can use as a totally isolated and unprivileged user. #nopriv_user=ftpsecure # # Enable this and the server will receachse asynchronous ABOR requests. Not # recommended for security (the code is non-trivial). Not enabling it, # however, may confuse older FTP clients. #async_abor_enable=YES # # By default the server will pnetworkingnd to allow ASCII mode but in fact ignore # the request. Turn on the below options to have the server actually do ASCII # mangling on files when in ASCII mode. # Beware that on some FTP servers, ASCII support allows a denial of service # attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd # predicted this attack and has always been safe, reporting the size of the # raw file. # ASCII mangling is a horrible feature of the protocol. #ascii_upload_enable=YES #ascii_download_enable=YES # # You may fully customise the login banner string: #ftpd_banner=Welcome to blah FTP service. # # You may specify a file of disallowed anonymous e-mail addresses. Apparently # useful for combatting certain DoS attacks. #deny_email_enable=YES # (default follows) #banned_email_file=/etc/vsftpd/banned_emails # # You may specify an explicit list of local users to chroot() to their home # directory. If chroot_local_user is YES, then this list becomes a list of # users to NOT chroot(). chroot_local_user=YES #chroot_list_enable=YES # (default follows) #chroot_list_file=/etc/vsftpd/chroot_list # # You may activate the "-R" option to the builtin ls. This is disabled by # default to avoid remote users being able to cause excessive I/O on large # sites. However, some broken FTP clients such as "ncftp" and "mirror" assume # the presence of the "-R" option, so there is a strong case for enabling it. #ls_recurse_enable=YES # # When "listen" directive is enabled, vsftpd runs in standalone mode and # listens on IPv4 sockets. This directive cannot be used in conjunction # with the listen_ipv6 directive. listen=YES # # This directive enables listening on IPv6 sockets. To listen on IPv4 and IPv6 # sockets, you must run two copies of vsftpd with two configuration files. # Make sure, that one of the listen options is commented !! #listen_ipv6=YES pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES 

Chiave INPUT (politica ACCEPT 0 pacchetti, 0 byte) pkts bytes target prot opt ​​in destinazione sorgente 49051 24M ACCEPT all – * * CONNESSIONE, ESTABLATA 48 3104 ACCEPT icmp – * * 0 0 ACCEPT all-lo * 221 12996 ACCEPT tcp – * * stato NUOVO tcp dpt : 22 88 5188 ACCEPT tcp – * * stato NUOVO tcp dpt: 80 28 1424 ACCEPT tcp – * * stato NUOVO tcp dpt: 21 488 25316 ACCEPT tcp – * * stato NUOVO tcp dpt: 443 2 104 ACCEPT tcp – * * stato NUOVO tcp dpt: 636 3 156 ACCEPT tcp – * * stato NUOVO tcp dpt: 3690 0 0 ACCEPT tcp – * * stato NUOVO tcp dpt: 21 6 304 ACCEPT tcp – * * stato NUOVO tcp dpt: 20 0 0 ACCEPT udp – * * Stato NUOVO udp dpt: 21 0 0 ACCEPT udp – * * Stato NUOVO udp dpt: 20 2576 130K REJECT tutto – * * rifiuto con icmp-host-prohib itati

Catena FORWARD (politica ACCEPT 0 pacchetti, 0 byte) pkts bytes target prot opt ​​nella destinazione sorgente 0 0 REJECT all – * * rifiuto con icmp-host-prohibited

Chiave OUTPUT (criteri ACCEPT 47281 pacchetti, 7169K byte) pkts bytes target prot opt ​​in destinazione sorgente

2 Solutions collect form web for “Porta FTP chiusa per il servizio vsftpd”

Eseguire quanto segue dal sistema per vedere se un process utilizza la port 21:

 lsof -i:21 

Se ci sono processi e non sono il tuo servizio vsftpd, allora dovrai distriggersrli per liberare la port 21 per vsftpd.

Se ci sono processi per vsftpd, dovrai scendere il path di risoluzione dei problemi di networking (controlla il routing, i firewall, ecc.).

Se non ci sono processi, quindi vsftpd non è mai avviato su quella port e c'è un problema diverso. Controllare il file di registro (forse / var / log / messages per impostazione predefinita) e considerare di provare a avviare il daemon in modalità di debug. Si noti inoltre che la port 21 è considerata una port privilegiata, in modo tale che i processi devono disporre di privilegi di root per utilizzarla (alless inizialmente).

Se ansible, verificare che la port sia aperta nel router e inoltrata al server.

Suggerimenti per Linux e Windows Server, quali Ubuntu, Centos, Apache, Nginx, Debian e argomenti di rete.