Non standard FTP port

[momo]

Hi there,

well it is a normal behaviour when you're using passive ftp.
I mean address sent to the client is inside the datagram as data.
I mean if you contact a server in passive mode server will respond with : here is my ip address and we can talk with this port.

That's why Synology has an option to propagate the WAN address not the local address for the FTP.
Now if you contact the server and server is responding : here is my WAN address and we can talk on this port, you have a firewall problem and it is depends of your router.
Some intelligent routers can open ports knowing that the source address has initiated a communication and in this case it is transparent but some others should have rules to explicitly open ports.

[ThomasG]

Hey guys

I'm also having problems connecting to my FTP on a non standard port. I own a CS407 using firmware DSM 2.1-0839.

I already use port 21 for another FTP, so i have been trying to use different ports both active/passive modes to access my CS407, i have tryed port 81,82,83,84 and on some ports i get no connection, on port ex. 81 i can connect and it verifies my user/pass but cannont retrieve directory listing?

And yes i have forwarded the correct ports to my synology box, and veryfied that i can connect to my servers etc. from the outside, but not with the ftp service on my synology box?

Im totally blank on what to try? has anyone used the same synology box running a ftp service on a nonstandard port with succes?

Thanks in advance

- ThomasG

[tripudio]

Have two SD209, cant access ftp from internet. I try one in post 21 and another in 1028. 1028 don´t work.
Please help me
Thanks
Robert