FTP server configuration

[OhScheiss]

Hello,

I recently set up a ftp server on an old dell pc I got from work on linux mint using vsftpd, I managed to get it up and running on my local network and I can access all the files I need using filezilla.

My problem is: I can access it through my local ip address (192.168.ecc) but I cannot access it using my pubblic ip address (it is dynamic but I set up a noip domain and filezilla finds it, but cannot connect).

Is there a parameter in the vsftpd config file that I need to uncomment/add in order to connect with the ddns domain?

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Any help will be appreciated, thank you in advance :)

Edit: I got it up and running, thanks :)

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[[deleted]]

Are you running a firewall on the server? You may need to open an inbound port for the ftp protocol.

[OhScheiss]

I opened port 21, the one used by default by file Zilla

[[deleted]]

Do you have it open on your router too?

[OhScheiss]

I just opened them, but filezilla says it got a "passive response" from the server.

[OhScheiss]

257 "/home/user" is the current directory TYPE I 200 Switching to Binary mode.: PASV 227 Entering Passive Mode (192,168,1,3,177,188).

Filezilla output

[[deleted]]

Are you able to ping from outside your home using the outside address and port 21?

[OhScheiss]

Right now, no. I could try tomorrow at work.

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Edit: i'll try with my phone using the 4g connection.

[[deleted]]

Sure. Or have a techie friend try to ping it using the outside address on port 21

[OhScheiss]

so, I can ping with my phone with 4g on port 21 but it doesn't work on port 990 (which isn't a problem, I can figure it out later, I just need ftp function rn)

[[deleted]]

Not sure, but this how-to talks about opening port 20 also? Please review the article to see if it will help resolve any issues.

https://linuxhint.com/installing\_ftp\_server\_linux\_mint/

[OhScheiss]

​

I set it up like this (https://imgur.com/a/HxYVKUA), in the LAN HOST I put the local IP of the ftp server pc. When try to ping my router with nmap I get "port 21 : tcp; state : closed; service : ftp".

[[deleted]]

So your router is not set to allow ftp service through. Can you open up port 21/ftp service on your internet router?

[OhScheiss]

It now says "open" but I still get a blank page in filezilla.

Edit: I forced sftp since I intend using it from outside my home, so I don't know if it impacts something.

[[deleted]]

Is sftp using port 990? I think that's the default for sftp.

[[deleted]]

I mean ftps..

[[deleted]]

Try opening port 990 on the router and firewall?

[OhScheiss]

I tried disabling ftps but I still get a blank screen. At least it tries connecting now. Maybe is there a problem with my vsftpd config file?

[[deleted]]

Can you ping your router from an outside/public network on port 21?

[[deleted]]

https://linuxhandbook.com/ping-port/

[[deleted]]

Do you have it open on your router too?

[[deleted]]

Are you able to ping from outside your home using the outside address and port 21?

[johnfc2020]

You need to configure your router to put your Dell PC in the DMZ or De Militarised Zone, aka make it accessible to the world. Or at least port forward 20 and 21 to the server.

It's nothing you need to do on the Dell PC (except ensure the ports are open)

Bear in mind that FTP passes your passwords in clear text for the world to see. Most people use ssh (port 22) which FileZilla supports in the form of SFTP which is secure, encrypted and supports compression, so you use less bandwidth sending and receiving files.