What crypto algorithm could not negotiated error?

FTP, SFTP, FTPS, and SSH/telnet console issues

What crypto algorithm could not negotiated error?

Postby vipvaishu » Sat Jul 18, 2009 9:46 am

I am on latest version of UE. Whenever trying to connect to ssh using browse menu and then clicking connect it gives me this error.
If I plan to use sftp/telnet console and click on connect it just disconnect asap and provide no error. Does anyone know what I am doing wrong?
vipvaishu
Newbie
 
Posts: 2
Joined: Sat Jul 18, 2009 9:29 am

Re: What crypto algorithm could not negotiated error?

Postby sklad2 » Mon Jul 20, 2009 9:22 am

I see this when my account is locked out on the unix side. If it is locked, then unlock it. Should work.
User avatar
sklad2
Advanced User
Advanced User
 
Posts: 56
Joined: Thu Mar 08, 2007 12:00 am

Re: What crypto algorithm could not negotiated error?

Postby vipvaishu » Wed Sep 09, 2009 8:00 am

No my account is not lock. I can log into my account using SSH or winSCP but not using UltraEdit.
vipvaishu
Newbie
 
Posts: 2
Joined: Sat Jul 18, 2009 9:29 am

Re: What crypto algorithm could not negotiated error?

Postby Mofi » Wed Sep 09, 2009 10:17 am

Have you verified that for the SSH account you are using here the correct settings are set on the tab Authentication in the SSH/Telnet Account Manager dialog?

Or do you use SSH for FTP? Then you have to set the correct settings on tab SSH/SSL in the FTP Account Manager dialog.
User avatar
Mofi
Grand Master
Grand Master
 
Posts: 3937
Joined: Thu Jul 29, 2004 11:00 pm
Location: Vienna

Re: What crypto algorithm could not negotiated error?

Postby Restless » Fri Nov 13, 2009 10:31 pm

I have UE 15.00 (and requested an authorization code to upgrade to 15.20) and have this problem with my webhost as well. I have checked all the settings multiple times and I can log into other devices with SFTP, but not with my webhost because I haven't changed anything there in some time.

I submitted a ticket about the issue and received this reply:

The supported SSH ciphers were changed several months ago due to security concerns. You may want to try updating your problematic software to the latest version and see if that helps. If not, I'm afraid you'll have to use another program which supports the necessary ciphers. The latest versions of PuTTY and FileZilla will work.

I am in the process of trying to get the information on what ciphers are supported, but barring that what can be done?

Additional info: the supported ciphers are aes128-ctr, aes256-ctr, arcfour256, and arcfour.
Restless
Newbie
 
Posts: 4
Joined: Tue May 19, 2009 2:20 pm

Re: What crypto algorithm could not negotiated error?

Postby vx220 » Sun Jan 03, 2010 6:52 pm

I have the same issue - can't connect using sftp to opensolaris - though command line works fine - running UE 15.20 - anyone got any suggestions?
vx220
Newbie
 
Posts: 1
Joined: Sun Jan 03, 2010 6:51 pm

Re: What crypto algorithm could not negotiated error?

Postby Restless » Mon Jan 04, 2010 5:15 pm

Apparently there are no workarounds on the client side if the cipher isn't supported. You'd have to implement a supported cipher on the server.
Restless
Newbie
 
Posts: 4
Joined: Tue May 19, 2009 2:20 pm


Return to FTP/SFTP / SSH/Telnet