Region : Others

Model : TL-MR3220

Hardware Version : V2

Firmware Version : 3.15.2 Build 130423 Rel.61823n

ISP : Invitel, Hungary

Hi,

We have this kind of router and we experienced a weird issue when we use a curl ftp client behind the router to a public ftp server.

The problem is:
- the client connects to the ftp server
- start uploading binary files (tiff)
- after some progress the uploading just hangs for a while and after a timeout, the connection closed with error code

We replaced the router with a mikrotik router, we did not change other components or software, start the uploading, it finished without error. We confirmed this behaviour several times, with different files, the result always that, the tp-link router failed, mikrotik is working well, while everything else the same.

The setup of the router:
- FTP ALG turned on, everything else off (tfpt, vpn, etc.) - with turned off FTP ALG ftp simply does not work
- SPI firewall - doesn't matter it is on or off, we left on
- Advanced security - nothing set, as default

I got a logs from the server side, it reported that, our side closed the control channel, while we are sure, our side closed only after the transfer hangs and timout reached.

Any idea?
Unfortunately I did not find any useful diagnostic tool or logs in the router.

Thank you,
István