Specify FTP port?

Ignition
,
1

I have a script to retrieve files via FTP after an event. This was working fine, however we then changed our architecture to move the gateway into the cloud, as a result we had to setup port forwarding on our remote routers.

import os
	import system
	from ftplib import FTP
	import os.path
	
	localpath = "\\\\C:\\Temp\\redacted\\FTP\\"
	
	ftp = FTP('10.redacted')
	ftp.login('redacted','redacted')
	ftp.cwd('/data/redacted/')
	
	files = []
	command = 'LIST'
	ftp.retrlines(command, files.append)
	for i in range(len(files)):
			files[i] = files[i].replace(files[i][0:48], '')
			
	print files
	
	for file in files:
		if os.path.exists(localpath + file):
			#do nothing
			print "exists"
		else:
			filename = system.file.getTempFile(file) 
			s=ftp.retrbinary('RETR' + file, open(filename,'wb').write)
		
			print s
			system.file.writeFile(localpath + file, system.file.readFileAsBytes(filename))
		
	ftp.close()

I can successfully connect and retrieve the files using FileZilla with a port forward setup on 555:21, 556:20, however this is a manual process and I would like to return it to be automated.

Is it possible to specify the port in the above script?

I tried ftp = FTP('10.redacted':555) etc already

2

https://docs.python.org/2.7/library/ftplib.html#ftplib.FTP.connect

3

Thanks, still no joy;

ftp = FTP()
ftp.connect('10.redacted', 555)

Traceback (most recent call last):
  File "<buffer>", line 9, in <module>
  File "C:\Users\patrick.gillian\.ignition\cache\gw10.redacted_8088_8043_main\C0\pylib\ftplib.py", line 129, in connect
    raise socket.error, msg
socket.error: (10061, 'Connection refused')

Running this in script console (being naughty and running the designer on the gateway VM...runs and hides from Phil's big stick)

4

Well, just a networking error at this point. Connection refused is what it is. You have something configured wrong, or there's a firewall blocking it, or you have the wrong/IP port, or it's not reachable, etc...

1 Like
5

Does the IP address really start with 10.? This would be a private IP... how are you reaching it from the cloud?

6

OpenVPN

AWS starts on 10.

Site subnets start actually 172.

7

Well I'm just gonna have to assume you have all that set up correctly.

Your original post mentions "port forwarding on remote routers", which I don't really understand the necessity of if you're using a VPN setup. But I can only assume you know all the details here...

8

Still not the same environment as the gateway service.

Heh. Maybe I should change my avatar to the all-seeing eye:

The_Eye_Of_Providence
The_Eye_Of_Providence640×564 60.8 KB

2 Likes
9

Well, I have 116 ModbusTCP connections configured this way and they all work and have done for over a year.

Gateway is on 10.a.b.c

OpenVPN tunnel is 172.a.b.c

Each site has a remote router on 4G, with a VPN client cert which gives each site a unique tunnel address of 172.a.b.unique

I setup the device connection in the gateway as 172.a.b.unique:502 and :503 if two devices

Then in the router I port forward from remote address 10.a.b.c (gateway) to local site device, which can be any IP, e.g. 10.a.b.c:502->10.11.12.1:502 and 10.a.b.c:503->10.11.12.2:502

Just need to get the FTP port forward working, I've asked the clouid dev ops eng to have a look at the firewall rules there.

For the sake of testing one script I can't be bothered with message handlers, but putting the above script in a gateway timer script also results in connection refused.

10

The cloud firewall was updated and I can now connect, thanks!

>>> 
'220 Ready'
'230 Logged in'
'250 Requested file action okay, completed'
'226 Transfer Complete'