Couldn't access FTP servers via Belkin router N+
 

Hi guys,
it's the first time I write here. I am Italian, so... pardon for my possible errors. :)

I have just bought a Belkin N+ Wireless Modem Router (this one) in substitution of my modem ethernet D-Link 320-T.

The Belkin is working ok, except that I can't access any FTP site. I can surf the Web but can't use the FTP service. I use FileZilla or even the terminal to connect to the FTP, but I can't with the Belkin device. Tried to re-use the D-Link and all works fine.

Is there a setting I have to change in the Belkin's router admin panel?

P.S. I asked the Belkin support without success: they didn't know this problem.

Re: Couldn't access FTP servers via Belkin router N+
 

Try changing your MTU value from the stupidly default 1432 to the maximum 1500. Had exactly the same problem with a Belkin N+ ADSL router, and this fixed it straight away...

Re: Couldn't access FTP servers via Belkin router N+
 

Try forwarding ports 20 and 21

Re: Couldn't access FTP servers via Belkin router N+
 

A firmware upgrade might resolve this aswell.. What FTP program are you using?

Re: Couldn't access FTP servers via Belkin router N+
 

@xocemp / @webcrawler2050 - do either of you have a Belkin N+ router?

Firmware upgrades or forwarding ports 20/21 have no effect on this issue. Even turning off the firewall on the router and placing your machine in the DMZ won't resolve this issue.

Re: Couldn't access FTP servers via Belkin router N+
 

I used to have one at work. It was a git for FTP -

Ar eyou able to provide FTP logs?

Re: Couldn't access FTP servers via Belkin router N+
 

Yep, but not sure what benefit you'd get out of them. All that happens is that after sending PASV (if you're using a passive connection) then LIST, then whatever FTP client you are using will hang waiting for a data connection to be established. But this hanging will only occur if the total size of the data (eg a small directory listing) is quite small. Downloading a file or getting a listing from a directory with more than three or four items will cause the data connection to timeout. Yet when the MTU is upped to 1500, this hanging goes away completely....

Re: Couldn't access FTP servers via Belkin router N+
 

I'd be able to read through them, will give me a good idea, where the problem lays.