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Host refused connection when using ftp

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I need to connect to my server using FTP, but connection refuses. I have been using SFTP that is working just fine (both locally and externally). Using linux debian. I am able to login with ftp locally, but need to gain external access.

I have opened all required ports (I think so at least, ports 20-23), tried different softwares and reinstalling em, but nothing seems to be working. Tried also few different configurations and disabling ssh. I dont know if I have configured something to block external access or what it is - I am rather new to linux enviroment. The port itself should be open (not blocked by isp) and ipv6 seemed to be listening to it.

I have gone through hundreds of forum posts and spent ages googling, but cant really come up with anything. Might be that I dont even properly know what to look for. Here is copy of my vsftpd.conf file https://pastebin.com/tqiqPNX4

linux debian ftp sftp port-forwarding

share

asked 7 hours ago

Div132Div132

1

New contributor

Div132 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  SSH (ssh and scp and sftp) does not have anything to do with ftp. You say you're able to connect to your server from the server itself? How are you connecting then? Is the ftp service listening on an external port, or only on a port on localhost? Does "externally" mean from another machine on the same subnet, or on a truly external machine outside the local network?
  
  – Kusalananda♦
  7 hours ago
  
  
  

  
  
  
  

add a comment | 

0

I need to connect to my server using FTP, but connection refuses. I have been using SFTP that is working just fine (both locally and externally). Using linux debian. I am able to login with ftp locally, but need to gain external access.

I have opened all required ports (I think so at least, ports 20-23), tried different softwares and reinstalling em, but nothing seems to be working. Tried also few different configurations and disabling ssh. I dont know if I have configured something to block external access or what it is - I am rather new to linux enviroment. The port itself should be open (not blocked by isp) and ipv6 seemed to be listening to it.

I have gone through hundreds of forum posts and spent ages googling, but cant really come up with anything. Might be that I dont even properly know what to look for. Here is copy of my vsftpd.conf file https://pastebin.com/tqiqPNX4

linux debian ftp sftp port-forwarding

share

asked 7 hours ago

Div132Div132

1

New contributor

Div132 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  SSH (ssh and scp and sftp) does not have anything to do with ftp. You say you're able to connect to your server from the server itself? How are you connecting then? Is the ftp service listening on an external port, or only on a port on localhost? Does "externally" mean from another machine on the same subnet, or on a truly external machine outside the local network?
  
  – Kusalananda♦
  7 hours ago
  
  
  

  
  
  
  

add a comment | 

I need to connect to my server using FTP, but connection refuses. I have been using SFTP that is working just fine (both locally and externally). Using linux debian. I am able to login with ftp locally, but need to gain external access.

I have opened all required ports (I think so at least, ports 20-23), tried different softwares and reinstalling em, but nothing seems to be working. Tried also few different configurations and disabling ssh. I dont know if I have configured something to block external access or what it is - I am rather new to linux enviroment. The port itself should be open (not blocked by isp) and ipv6 seemed to be listening to it.

I have gone through hundreds of forum posts and spent ages googling, but cant really come up with anything. Might be that I dont even properly know what to look for. Here is copy of my vsftpd.conf file https://pastebin.com/tqiqPNX4

linux debian ftp sftp port-forwarding

share

asked 7 hours ago

Div132Div132

1

New contributor

Div132 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

asked 7 hours ago

Div132Div132

1

New contributor

Div132 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

asked 7 hours ago

Div132Div132

1

New contributor

Div132 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 7 hours ago

Div132Div132

1

New contributor

Div132 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 7 hours ago

Div132Div132

1

1 Answer
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FTP protocol requires second inbound connection from FTP server to FTP client to transfer data by default. Frequently users does not have public IPv4 address so can not receive inbound connections from anywhere or client's host can not accept inbound connection for security purposes. For same cases FTP protocol can use passive mode also. This passive mode uses second outbound connection from FTP client to FTP server.

Step 1. Please try to enable passive mode at your FTP client to use data outbound connection from FTP client to FTP server.

All web browser's use passive mode always.

Many FTP clients do not use passive mode by default so it need to enable the mode.

For example, classic FTP client ftp has -p option to enable passive mode.

Step 2. Please enable passive mode at your server. You need to add passive mode options at your config of vsftpd server:

pasv_min_port=10000

pasv_max_port=11000

pasv_promiscuous=NO

pasv_address=111.122.133.144

Please change value of pasv_address. I have used these options for same purposes.

You can change interval of TCP ports if required. FTP server and FTP client will negotiate that at handshake.

Step 3. Please allow incoming connections for TCP ports 10000-11000 at FTP server's firewall.

NB. The FTP protocol is not secure to use over public networks. User's password transfers as plain text and this data can be captured. FTP protocol still applicable to public access to files in read only mode. To secure FTP protocol you need use VPN.

share|improve this answer

edited 50 mins ago

answered 1 hour ago

nempyxanempyxa

112

add a comment | 

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0

FTP protocol requires second inbound connection from FTP server to FTP client to transfer data by default. Frequently users does not have public IPv4 address so can not receive inbound connections from anywhere or client's host can not accept inbound connection for security purposes. For same cases FTP protocol can use passive mode also. This passive mode uses second outbound connection from FTP client to FTP server.

Step 1. Please try to enable passive mode at your FTP client to use data outbound connection from FTP client to FTP server.

All web browser's use passive mode always.

Many FTP clients do not use passive mode by default so it need to enable the mode.

For example, classic FTP client ftp has -p option to enable passive mode.

Step 2. Please enable passive mode at your server. You need to add passive mode options at your config of vsftpd server:

pasv_min_port=10000

pasv_max_port=11000

pasv_promiscuous=NO

pasv_address=111.122.133.144

Please change value of pasv_address. I have used these options for same purposes.

You can change interval of TCP ports if required. FTP server and FTP client will negotiate that at handshake.

Step 3. Please allow incoming connections for TCP ports 10000-11000 at FTP server's firewall.

NB. The FTP protocol is not secure to use over public networks. User's password transfers as plain text and this data can be captured. FTP protocol still applicable to public access to files in read only mode. To secure FTP protocol you need use VPN.

share|improve this answer

edited 50 mins ago

answered 1 hour ago

nempyxanempyxa

112

add a comment | 

0

FTP protocol requires second inbound connection from FTP server to FTP client to transfer data by default. Frequently users does not have public IPv4 address so can not receive inbound connections from anywhere or client's host can not accept inbound connection for security purposes. For same cases FTP protocol can use passive mode also. This passive mode uses second outbound connection from FTP client to FTP server.

Step 1. Please try to enable passive mode at your FTP client to use data outbound connection from FTP client to FTP server.

All web browser's use passive mode always.

Many FTP clients do not use passive mode by default so it need to enable the mode.

For example, classic FTP client ftp has -p option to enable passive mode.

Step 2. Please enable passive mode at your server. You need to add passive mode options at your config of vsftpd server:

pasv_min_port=10000

pasv_max_port=11000

pasv_promiscuous=NO

pasv_address=111.122.133.144

Please change value of pasv_address. I have used these options for same purposes.

You can change interval of TCP ports if required. FTP server and FTP client will negotiate that at handshake.

Step 3. Please allow incoming connections for TCP ports 10000-11000 at FTP server's firewall.

NB. The FTP protocol is not secure to use over public networks. User's password transfers as plain text and this data can be captured. FTP protocol still applicable to public access to files in read only mode. To secure FTP protocol you need use VPN.

share|improve this answer

edited 50 mins ago

answered 1 hour ago

nempyxanempyxa

112

add a comment | 

FTP protocol requires second inbound connection from FTP server to FTP client to transfer data by default. Frequently users does not have public IPv4 address so can not receive inbound connections from anywhere or client's host can not accept inbound connection for security purposes. For same cases FTP protocol can use passive mode also. This passive mode uses second outbound connection from FTP client to FTP server.

Step 1. Please try to enable passive mode at your FTP client to use data outbound connection from FTP client to FTP server.

All web browser's use passive mode always.

Many FTP clients do not use passive mode by default so it need to enable the mode.

For example, classic FTP client ftp has -p option to enable passive mode.

Step 2. Please enable passive mode at your server. You need to add passive mode options at your config of vsftpd server:

pasv_min_port=10000

pasv_max_port=11000

pasv_promiscuous=NO

pasv_address=111.122.133.144

Please change value of pasv_address. I have used these options for same purposes.

You can change interval of TCP ports if required. FTP server and FTP client will negotiate that at handshake.

Step 3. Please allow incoming connections for TCP ports 10000-11000 at FTP server's firewall.

NB. The FTP protocol is not secure to use over public networks. User's password transfers as plain text and this data can be captured. FTP protocol still applicable to public access to files in read only mode. To secure FTP protocol you need use VPN.

share|improve this answer

edited 50 mins ago

answered 1 hour ago

nempyxanempyxa

112

pasv_min_port=10000

pasv_max_port=11000

pasv_promiscuous=NO

pasv_address=111.122.133.144

share|improve this answer

edited 50 mins ago

answered 1 hour ago

nempyxanempyxa

112

answered 1 hour ago

nempyxanempyxa

112

answered 1 hour ago

nempyxanempyxa

112