No FTP connection to raspi pico w

[croeh]

Hello,
I try to connect a "Raspi PICO W" via FileZilla without TLS (only use plain FTP) and get the following message:

Status: Connecting to 192.168.1.200:21...
Status: Connection established, waiting for welcome message...
Response: 220 --- Welcome to Simply FTP server ---
Command: AUTH TLS
Response: 220 --- By Renzo Mischianti ---
Status: Initializing TLS...
Response: 220 -- Version 2.1.8 (2024-07-17) --
Error: GnuTLS error -15: An unexpected TLS packet was received.
Status: Connection attempt failed with "ECONNABORTED - Connection aborted".
Error: Could not connect to server

I minimized your "Welcome" message by comment out the additional "220 ---" command lines. see below

void FtpServer::clientConnected()
{
DEBUG_PRINTLN( F(" Client connected!") );
client.print(F("220 --- ")); client.print(welcomeMessage); client.println(F(" ---"));
//client.println(F("220 --- By Renzo Mischianti ---"));
//client.print(F("220 -- Version ")); client.print(FTP_SERVER_VERSION); client.println(F(" --"));
iCL = 0;
if (FtpServer::_callback) {
FtpServer::_callback(FTP_CONNECT, free(), capacity());
}

}

Now it is running like expected

Status: Connecting to 192.168.1.200:21...
Status: Connection established, waiting for welcome message...
Status: Insecure server, it does not support FTP over TLS.
Status: Logged in
Status: Retrieving directory listing...
Status: Directory listing of "/" successful

I'm sure that your code is in general working. I just wondering why it is not working in my environment.
Do you have an idea?

Kind regards,
Carsten