EC20 - getting error +QFTPOPEN: 606,0

Hello

I am facing one issue in logging in on the FTPS server while uploading files.
Please help.

When i try to upload file through COM on non secured FTP server it works fine-
[2023-09-20_15:42:01:917]AT+QIACT=1

[2023-09-20_15:42:02:314]OK
[2023-09-20_15:42:03:359]AT+QFTPCFG=“contextid”,1

[2023-09-20_15:42:03:361]OK
[2023-09-20_15:42:04:571]AT+QIACT?

[2023-09-20_15:42:04:573]+QIACT: 1,1,1,“10.221.182.30”

[2023-09-20_15:42:04:573]OK
[2023-09-20_15:42:06:964]AT+QFTPCFG=“account”,“nhp_data”,“Nhp_data@1”

[2023-09-20_15:42:06:964]OK
[2023-09-20_15:42:07:995]AT+QFTPCFG=“filetype”,1

[2023-09-20_15:42:07:995]OK
[2023-09-20_15:42:08:773]AT+QFTPCFG=“transmode”,1

[2023-09-20_15:42:08:773]OK
[2023-09-20_15:42:09:517]AT+QFTPCFG=“rsptimeout”,20

[2023-09-20_15:42:09:517]OK
[2023-09-20_15:42:10:261]AT+QFTPOPEN=“nhpftp.skymetweather.com”,21

[2023-09-20_15:42:10:261]OK
[2023-09-20_15:42:10:705]
[2023-09-20_15:42:10:705]+QFTPOPEN: 0,0
[2023-09-20_15:42:10:980]AT+QFTPCWD=“/EC20”

[2023-09-20_15:42:10:983]OK
[2023-09-20_15:42:11:049]
[2023-09-20_15:42:11:049]+QFTPCWD: 0,0
[2023-09-20_15:42:12:973]AT+QFTPSTAT

[2023-09-20_15:42:12:973]OK

[2023-09-20_15:42:12:973]+QFTPSTAT: 0,1
[2023-09-20_15:42:14:354]AT+QFTPPUT=“EC20_DATA15.csv”,“COM:”,0,58,0

[2023-09-20_15:42:14:685]CONNECT
[2023-09-20_15:42:16:284]
[2023-09-20_15:42:16:284]OK

[2023-09-20_15:42:16:284]+QFTPPUT: 0,58
[2023-09-20_15:42:17:864]AT+QFTPCLOSE

[2023-09-20_15:42:17:864]OK

But when I try same on the FTPS Server it gives me an error +QFTPOPEN: 606,0

[2023-09-20_15:45:06:156]AT+QIACT?

[2023-09-20_15:45:06:158]OK
[2023-09-20_15:45:07:326]AT+QIACT=1

[2023-09-20_15:45:07:718]OK
[2023-09-20_15:45:08:767]AT+QIACT?

[2023-09-20_15:45:08:769]+QIACT: 1,1,1,“172.19.124.69”

[2023-09-20_15:45:08:769]OK
[2023-09-20_15:45:12:197]AT+QFTPCFG=“contextid”,1

[2023-09-20_15:45:12:197]OK
[2023-09-20_15:45:13:079]AT+QFTPCFG=“account”,“gujarat_sw_phase2”,“gujswphase@321”

[2023-09-20_15:45:13:079]OK
[2023-09-20_15:45:14:192]AT+QFTPCFG=“filetype”,1

[2023-09-20_15:45:14:192]OK
[2023-09-20_15:45:15:423]AT+QFTPCFG=“transmode”,1

[2023-09-20_15:45:15:423]OK
[2023-09-20_15:45:16:842]AT+QFTPCFG=“rsptimeout”,90

[2023-09-20_15:45:16:842]OK
[2023-09-20_15:45:18:316]AT+QFTPCFG=“ssltype”,1

[2023-09-20_15:45:18:316]OK
[2023-09-20_15:45:19:573]AT+QFTPCFG=“sslctxid”,1

[2023-09-20_15:45:19:573]OK
[2023-09-20_15:45:21:789]AT+QSSLCFG=“ciphersuite”,1, 0xffff

[2023-09-20_15:45:21:789]OK
[2023-09-20_15:45:23:742]AT+QSSLCFG=“seclevel”,1,0

[2023-09-20_15:45:23:742]OK
[2023-09-20_15:45:25:368]AT+QSSLCFG=“sslversion”,1,1

[2023-09-20_15:45:25:371]OK
[2023-09-20_15:45:26:670]AT+QFTPOPEN=“ftp.india-water.gov.in”,22

[2023-09-20_15:45:26:670]OK
[2023-09-20_15:45:27:086]
[2023-09-20_15:45:27:086]+QFTPOPEN: 606,0

Please help

Hi @Ruturaj_Shivajirao_Y
AT+QSSLCFG=“sslversion”,1,1 can be changed to AT+QSSLCFG=“sslversion”,1,4, and add the AT+QSSLCFG=“sni”,1,1 command, and confirm whether the SSL method only requires a single To certification.