No access with FileZilla but ftp works

[ESgt]

I have two web-sites, one of which I control with ftp from cmd prompt; like this:
C:\Users\HP>ftp
ftp> open www.derbyarc.org
Connected to rs1.vidavia.net.
220 Microsoft FTP Service
200 OPTS UTF8 command successful - UTF8 encoding now ON.
User (rs1.vidavia.net:(none)): derbyarc
331 Password required
Password:
230 User logged in.
ftp> cd www.derbyarc.org
250 CWD command successful.
ftp> prompt
Interactive mode Off .
ftp> dir
200 PORT command successful.
150 Opening ASCII mode data connection.
03-21-20 11:47PM 10375 about.html ---------------- and so on.

But with FileZilla the result is always like this:
Status: Connection attempt failed with "EAI_NONAME - Neither nodename nor servname provided, or not known".

Could you please help me how to apply FileZilla in this case.

[boco]

Looks like FileZilla cannot resolve the server name to an IP, maybe a firewall restricts its ability to DNS-resolve?

As a workaround, try to use the IP address of the server directly (which is 94.236.73.13).

[ESgt]

Thank you for the suggestion using the IP directly. It produces this set of statements. Is there further indication amongst them please?
Status: Connecting to 94.236.73.13:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Logged in
Status: Retrieving directory listing...
Status: Server sent passive reply with unroutable address. Using server address instead.
Command: LIST
Response: 150 Opening BINARY mode data connection.
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing

[botg]

The server sits behind a NAT router, however neither the server nor the NAT router have been configured accordingly.