Re: RN214 FTP Timeout After Transferring Small Amount of Data

Bippin · ‎2019-01-07

Device:

ReadyNAS 214; 6.9.4 Hotfix 1;

~ 7.8 TB free; no quotas enabled

Clients: Filezilla 3.39.0; Windows 7 FTP CLI

Network:

MicroTik router

Last Change: Upgraded ReadyNAS to 6.9.4

I am trying to FTP upload (to NAS from Internet) or download (from NAS to Internet) a file and the connection establishes and the file transfer starts but stops and times out after a small amount of data is transferred (~100KB). The only error message is a timeout error.

If I enable the ability to resume, the file will eventually transfer by sending a small chunk of data, timeout, and then resume.

This problem only exists when transferring from outside the network. Transfers on the LAN have no issues using the same FTP client (same version of Filezilla).

This had been working before the upgrade to ReadyNAS 6.9.4.

Any help is appreciated!!

**************************************

Log from FTP Client:

Status: Connection established, waiting for welcome message...
Status: Logged in
Status: Starting download of /BTWOneDrive/Presentation.pptx
Command: CWD /BTWOneDrive
Response: 250 CWD command successful
Command: TYPE I
Response: 200 Type set to I
Command: PASV
Response: 227 Entering Passive Mode (1,1,1,1,218,65).
Command: RETR Presentation.pptx
Response: 150 Opening BINARY mode data connection for Presentation.pptx (1114244 bytes)
Error: Connection timed out after 20 seconds of inactivity
Error: File transfer failed after transferring 81,760 bytes in 20 seconds
Status: Disconnected from server
Status: Resolving address of www.zippy.com
Status: Connecting to 1.1.1.1:2021...
Status: Connection established, waiting for welcome message...
Status: Logged in
Status: Starting download of /BTWOneDrive/Presentation.pptx

ETH1 SettingsFTP Settings

StephenB · ‎2019-01-08

Your passive port range is much too large (though it is the default). I recommend 3-4 passive ports per (simultaneous) connection. Also, the ports should be in the private range allocated by IANA (49152-65535).

So perhaps try setting the passive port range to 50001-50004, and then configure your router to only forward those ports to the NAS. You should reserve the IP address for the NAS in your router, so it is always the same. Otherwise the port forwarding can fail.

Bippin · ‎2019-01-08

StephenB, thanks for the input!

I changed the passive ports to a small range of 100 (50100-50200) with no effect. As before, some traffic is making it through (roughly 100Kb) and then stopping.

The main reason I posted this in the Netgear forums is that the upgrade to 6.9.4 was the last change that was made and it was working before that. I was hoping that someone would say, "oh yeah, that is fixed in the mainteance release". 🙂

I did add a rule in my router to specifically forward the passive ports to the NAS which is probably a good idea in general but it didn't help either.

I'm willing to try any other ideas!

StephenB · ‎2019-01-08

The end of your client log looks wrong to me. 1.1.1.1 is the CloudFlare public DNS service, not the IP address of www.zippy.com. And I don't know why it would be trying to resolve www.zippy.com anyway. Any clarification of what that's about? Did you change those bits to mask your WAN IP address?

@Bippin wrote:

The main reason I posted this in the Netgear forums is that the upgrade to 6.9.4 was the last change that was made

It's painless to downgrade to 6.9.3, so maybe do that and retest.

Bippin · ‎2019-01-08

The erroneous IP and DNS names were masking actuals. I guess I should have used x's. 🙂

I will look up the procedure to downgrade and see if that helps.

StephenB · ‎2019-01-09

@Bippin wrote:

The erroneous IP and DNS names were masking actuals. I guess I should have used x's. 🙂

No problem, I was guessing that but wanted to confirm.

@Bippin wrote:

I will look up the procedure to downgrade and see if that helps.

Download the arm zip from https://kb.netgear.com/000055199/ReadyNAS-OS-6-Software-Version-6-9-3.
Extract the firmware from the zip
upload using the manual install on the systems->settings page of the admin web ui.
Reboot the system (it will prompt you) when done.

Bippin · ‎2019-02-07

It took me a little while to get this done but I downgraded to 6.9.3 and it didn't help. I also upgraded to 6.9.5 and that didn't help either. I also tried a different FTP client (WinSCP 5.13.7) to no avail.

StephenB · ‎2019-02-08

I've uploaded a few 100 GBs of data over FTPS using the FileZilla client over the past couple of days. This is with FileZilla 3.4.0, and the NAS is running 6.9.5.

I have seen a couple of connection timeouts, but FileZilla reconnected, and resumed uploading.

Bippin · ‎2019-02-09

My latest test was to install Filezilla server on my PC to see if it might be something with my router config. I changed my NAT rule IP address to the Filezilla server PC and got good transfers so I am only getting the timeout with the ReadyNAS FTP (now on 6.9.5). I even upgraded my router code just to make try to see if that helped.

All signs point to something with the ReadyNAS but I just have no idea what.

I also have an older ReadyNAS NV2+ that I will try as well.