Urgent: Encounter 606 in ftp server connection

IoT Modules LTE Standard Module
1

Hi, I have a ftp server setup as only allowing connections over SSL/TLS. I use filezilla to connect to this ftp server with default port 21 and there is no issue at all. However, when I use EC200N to try connecting to the ftp server, it always report “606”, regardless of whether I try to connect via ftp or ftps. Please help!

I am using Qnavigator V1.6.9. I try both: 1)getting rid of the SSL configuration commands; or 2) set SSLtype to 0. I also try to set different values for the SSL versions. All come back with 606.

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Hi @mumunew
You can use the AT+QFTPCFG=“ssltype” command to check the FTP encryption method. If neither FTP nor FTPS works, it is recommended to try changing the SIM card.

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