# Does KFTPCLOSE correctly close FTP connection? **URL:** \ **Category:** Legacy HL Series\ **Created:** [February 5, 2021, 11:57am UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776 "2021-02-05T11:57:28Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 11:57am UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/1 "2021-02-05T11:57:28Z")
Hi, It seems that calling AT+KFTPCLOSE in HL7692 doesn’t send QUIT command over FTP Connection, and the ftp-server keep connection “alive” until timeout. AT+KFTPCFG=1,“x.y.z.q”,“vXXX”,“vXXXa”,“3340”,1 +KFTPCFG: 1 …recv or send something AT+KFTPCLOSE=1,0 OK Modem Information: AT+GMM HL7692 AT+GMR RHL769x.2.26.180400.201802141030.x7120m\_1 ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 5, 2021, 12:59pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/2 "2021-02-05T12:59:27Z")
do you see the control channel of FTP (on port 3340 in your case)is closed after AT+KFTPCLOSE? ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 2:01pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/4 "2021-02-05T14:01:13Z")
> [@mt\_0x](#): > > No it isn’t closed. I look at FTP server log and QUIT command is never received No it isn’t closed. I look at FTP server log and QUIT command is never received ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 5, 2021, 2:51pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/5 "2021-02-05T14:51:36Z")
does latest FW 2.27 have problem? [https://source.sierrawireless.com/resources/airprime/software/hl7692-firmware/#sthash.HepkauHF.dpbs](https://source.sierrawireless.com/resources/airprime/software/hl7692-firmware/#sthash.HepkauHF.dpbs) ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 2:54pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/6 "2021-02-05T14:54:14Z")
Sincerely I don’t know, my modules are now all soldered and I can’t easily upgrade ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 5, 2021, 2:55pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/7 "2021-02-05T14:55:15Z")
you don’t have USB port? Can you also install wireshark in your FTP server to see if the TCP connection on port 3340 is closed after the command? ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 2:56pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/8 "2021-02-05T14:56:15Z")
No ☹ Is there a changelog for 2.27? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 5, 2021, 2:56pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/9 "2021-02-05T14:56:59Z")
Can you also install wireshark in your FTP server to see if the TCP connection on port 3340 is closed after the command? ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 2:59pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/10 "2021-02-05T14:59:46Z")
Yes I can, tomorrow I will try Thank you ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 4:52pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/11 "2021-02-05T16:52:56Z")
![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/a/a1b4a9a088628d7fac8661892e1f7fd3bad97009.png) Not only the connection is not closed sending QUIT command after AT+KFTPCLOSE, but the modem continue sending NOOP command every 2 minutes for 10 minutes. After 10 minutes from successful transfer the QUIT command arrives to the FTP server ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 5, 2021, 5:10pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/12 "2021-02-05T17:10:30Z")
When did you type at+kftpclose? ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 5, 2021, 5:12pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/13 "2021-02-05T17:12:19Z")
After 37.0 second from the session beginning (just after the transfer complete) ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 6, 2021, 1:06am UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/14 "2021-02-06T01:06:54Z")
how about using the following? Is it same behavior? AT+KFTPCLOSE=1,1 AT+ KFTPCFGDEL=1 If + KFTPCFGDEL is successfully, according to the AT command user guide, the connection should be closed. ---
**Author:** ![mt\_0x](https://avatars.discourse-cdn.com/v4/letter/m/278dde/32.png) [@mt\_0x](https://forum.sierrawireless.com/u/mt_0x)\ **Post date:** [February 8, 2021, 2:50pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/15 "2021-02-08T14:50:47Z")
Just tried, nothing changed. The connection remains open even after AT+ KFTPCFGDEL=1 ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 8, 2021, 3:36pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/16 "2021-02-08T15:36:06Z")
how about AT+KCNXDOWN=1,1 ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [February 10, 2021, 1:00pm UTC](https://forum.sierrawireless.com/t/does-kftpclose-correctly-close-ftp-connection/22776/17 "2021-02-10T13:00:21Z")
I can see the TCP connection is closed after +KFTPCLOSE. AT+KCNXCFG=1,“GPRS”,“internet” OK AT+KFTPCFG=1,“xxx.xxx.xxx.xxx”,“username”,“password”,21,1 +KFTPCFG: 1 OK +KCNX\_IND: 1,4,1 +KCNX\_IND: 1,1,0 +KFTP\_IND: 1,1 AT+KFTPRCV=1,"",“2222.txt” CONNECT 2222–EOF–Pattern– OK +KFTP\_IND: 1,2,4 AT+KFTPCLOSE=1 OK +KCNX\_IND: 1,5,30 +KCNX\_IND: 1,0,0 ati3 RHL769x.2.24.173100.201709051100.x7120m\_1 OK ati9 RHL769x.2.24.173100.201709051100.x7120m\_1 HL7692 HL769x.2.24 x7120m FUSED 2017-09-05 11:32:03 r10943 OK ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/1/199c33a928c0d16ba69ff94bd36034dee2b18216.png)