Site to Site Transfer Not Completing...

[msamitz]

I am behind a Sonicwall FW (TZ200N). I have allowed (unchecked) for ftp bounce attack protection as originally this was showing up in the logs. After clear it, there were no further indications in the log file of any alerts or dropped packets. I was working with Sonicwall TS and the packet-capture log shows all requests as being accepted and acknowledged. Nothing is being dropped or rejected. I worked with SW TS for over an hour trying to resolve the issue. All other attempts for find an issue with the SW as the cause were unsuccessful and their conclusion is that the problem is not a SW issue. I can't 100% disagree as even with all security services shut down, the transfer never completed.

I can without issue, upload and download to/from either ftp server. PC <--> FTP works...

From what I see, the process starts and moves along as the file is created on the destination server, but the process STOPS cold on the [R]STOR filename.ext. Below is the log for each try.

For this example, I am trying to move one flat file (license.txt) from site to site.
source: ftp.adamvernermemorial.org == 72.167.232.143
destin: ftp.imasupport.com == 72.167.232.201
LanIP: 192,168,5,101,4,184

[L] PASV
[L] 227 Entering Passive Mode (72,167,232,143,198,66)
[R] PORT 72,167,232,143,198,66
[R] 200 PORT command successful
[R] STOR license.txt

>>>>>>> system sits idle for a few minutes then repeats

[R] Connection lost: ftp.imasupport.com
[R] Transfer Failed!
[R] Attempting to Reconnect.
[R] Connecting to ftp.imasupport.com -> DNS=ftp.imasupport.com IP=72.167.232.201 PORT=21 (attempt # 1)
[R] Connected to ftp.imasupport.com
[R] 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
[R] 220-You are user number 8 of 75 allowed.
[R] 220-Local time is now 05:39. Server port: 21.
[R] 220-This is a private system - No anonymous login
[R] 220 You will be disconnected after 3 minutes of inactivity.
[R] USER msamitz
[R] 331 User msamitz OK. Password required
[R] PASS (hidden)
[R] 230-User msamitz has group access to: 450
[R] 230 OK. Current directory is /
[R] SYST
[R] 215 UNIX Type: L8
[R] FEAT
[R] 211-Extensions supported:
[R] EPRT
[R] IDLE
[R] MDTM
[R] SIZE
[R] REST STREAM
[R] MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNI X.gid*;unique*;
[R] MLSD
[R] ESTP
[R] PASV
[R] EPSV
[R] SPSV
[R] ESTA
[R] AUTH TLS
[R] PBSZ
[R] PROT
[R] 211 End.
[R] CWD /
[R] 250 OK. Current directory is /
[R] PWD
[R] 257 "/" is your current location
[R] TYPE A
[R] 200 TYPE is now ASCII
[R] Listening on PORT: 1208, Waiting for connection.
[R] PORT 192,168,5,101,4,184
[R] 200 PORT command successful
[R] MLSD
[R] 150 Connecting to port 1208
[R] 226-Options: -a -l
[R] 226 62 matches total
[R] List Complete: 6 KB in 0.36 seconds (18.9 KB/s)
[L] PASV
[L] 227 Entering Passive Mode (72,167,232,143,198,66)
[R] PORT 72,167,232,143,198,66
[R] 200 PORT command successful
[R] STOR license.txt

>>>>>>> system sits idle for a few minutes then repeats

[R] Connection lost: ftp.imasupport.com
[R] Transfer Failed!
[R] Attempting to Reconnect.
[R] Connecting to ftp.imasupport.com -> DNS=ftp.imasupport.com IP=72.167.232.201

This sequence keeps repeating. I have tried non-passive mode with no avail.

On the destination side, the file (license.txt) is created (size 0) and a .pureftp-upload.xxxxx file is also created.

Any help would be greatly appreciated.