Filezilla Refuses Connection to Client

[robertdaleweir]

Hi
I have been trying to use Filezilla to transfer a Binary file onto a Router which I am converting to DD-WRT Firmware. I am using Fedora 24, 64 Bit OS. I have Filezilla Version 3.17.0.1 installed and have been using it successfully for several years. I have a my Router ( a WRT320N) running DD-WRT software and I can log into it successfully using Telnet. DD-WRT is an Open Source Firmware for Routers, running Linux. When I try to connect with Filezilla it refuses with the following error:

Code: Select all

 
 Status:	Connecting to 192.168.1.1...
Response:	fzSftp started, protocol_version=5
Command:	open "root@192.168.1.1" 22
Error:	The first key-exchange algorithm supported by the server is diffie-hellman-group1-sha1, which is no longer secure. Aborting connection.
Error:	Could not connect to server
Status:	Waiting to retry...
 " 

I understand that it is a Key Exchange issue probably because the 'diffie-hellman-group1-sha1' has been deprecated for Security reasons. I am wondering if I can somehow overcome this Restriction, as I know the risks but I only need to get one tiny file moved over. I do not know how to use Telnet, to get a file copied, as I cannot install any apps on the Router (like nc).

[botg]

There is no way in FileZilla to configure ciphers.

[boco]

I have Filezilla Version 3.17.0.1 installed

Sorry, but we do not support any but the very latest version (3.32.0, ATM).

I am wondering if I can somehow overcome this Restriction,

No, security restrictions are not configurable by their very design.

[robertdaleweir]

There is no way in FileZilla to configure ciphers.

Is there any way I can find (and copy) the keys that Filezilla uses for key exchange with its clients?

[robertdaleweir]

I have Filezilla Version 3.17.0.1 installed

Sorry, but we do not support any but the very latest version (3.32.0, ATM).

I am wondering if I can somehow overcome this Restriction,

No, security restrictions are not configurable by their very design.

What First Key would be exchanged by Filezilla when connecting to an SSH client? Is it still "diffie-hellman-group1-sha??' If not what would it possibly be? Thanks for your reply and I am probably clutching at straws...

[botg]

The first, preferred kex these days is curve25519-sha256@libssh.org

Note that FileZilla does not connect to an SSH client. It is an SSH client and connects to an SSH server, for using SSH's SFTP subsystem.