Cuteftp Sftp21 Error 4

» SFTP21 error = #4 (Algorithm negotiation failed) SFTP21 error = #4 (Algorithm negotiation failed) 4 Years Ago GlobalSCAPE Support 1 CuteFTP for Windows THE INFORMATION IN THIS ARTICLE APPLIES TO: CuteFTP Pro® 8.3.2 or earlier SYMPTOMS When attempting a connection using the SFTP protocol,

Sftp21 Error = #4

the following error is encountered: STATUS:> Getting listing ""... STATUS:> Initializing SFTP21 module... STATUS:> sftp21 error = #4. 0 Connecting to SFTP server... 192.168.20.135:22 (ip = 192.168.20.135)... ERROR:> Algorithm negotiation failed. ERROR:> The requested operation failed for an unknown reason. ERROR:> Can't connect to 192.168.20.135:22. SFTP21 error = #4. STATUS:> SFTP21 connection closed. CAUSE The SFTP server is using an encryption algorithm or cipher that is not supported by CuteFTP Pro version 8.3.2 or earlier. The most common ciphers causing this error areAES128 or AES256. (That is whatAlgorithm negotiation failed indicates.) You can also get this error just from providingthe wrong password. #4 error isa generic error saying connection/login failed. It just so happens in the example above, it was caused by bad ciphers. RESOLUTION To resolve this issue, upgrade to CuteFTP Pro version 8.3.3 or later.Support for AES128 and AES256 ciphers was added in CuteFTP Pro 8.3.3. If an upgrade is not an option,ask the administrator of the remote FTP server to allow useof a different cipher. The default configuration of earlier versions of CuteFTP Pro provided support for TripleDES, ARCFOUR, CAST128, Twofish and Blowfish automatically. The allowed ciphers are accessible from the SSH2 Security Settings screen in Global Options. Also In This Category WebHelp not displaying properly in browser Does Globalscape have a replacement for CuteSITE Builder? SFTP connection fails when password not specified in CuteFTP Site Properties or Quick Connect bar Submit a Ticket to Support Can GlobalSCAPE products be exported from the United States? (ECCN and CCATS for GlobalSCAPE Products) Moving CuteFTP to a new computer Officially Supported Products and EOL Dates SSL Security Levels and CuteFTP FTP Status and Error Codes Can I use a Windows Command Prompt to send FTP Commands to a server? On a scale of 1-5, please rate the helpfulness of this article 1 2 3 4 5 Not Helpful Very Helpful Optionally provide private feedback to help us improve this article... Thank you for your feedback! Next Comments require login or registration. Details Last Modified: 4 Years Ago Last Modified By: GlobalSCAPE 5 Type: ERRMSG Rated 2 stars based on 13 votes. Artic

» SFTP21 error = #0. 0 SFTP21 error = #0. 0 4 Years Ago GlobalSCAPE 5 CuteFTP for Windows THE INFORMATION IN THIS ARTICLE APPLIES TO: CuteFTP Pro® 8.3.3 or later SYMPTOM When attempting a connection using theSFTPprotocol, an error similar to the following occurs: STATUS:> [8/10/2010 4:06:28 PM] Getting listing ""... STATUS:> [8/10/2010 4:06:28 PM] Resolving host name sftp.examplehost.com... STATUS:> [8/10/2010 4:06:28 PM] Host name sftp.examplehost.com resolved: ip = 127.9.9.91. STATUS:> [8/10/2010 4:06:28 PM] Connecting to SFTP server... sftp.examplehost.com:22 (ip = 127.9.9.91)... ERROR:> [8/10/2010 4:06:30 PM] Can't connect to sftp.xxxxx.com:22. SFTP21 error = #0. 0 STATUS:> [8/10/2010 4:06:30 PM] SFTP21 connection closed RESOLUTION Double-check the username and password. If in doubt, contact the SFTP Server administrator https://kb.globalscape.com/KnowledgebaseArticle10351.aspx or the company that is hosting the SFTP server so that the username/password on your account can be reset. (GlobalSCAPE Support does not have this information.) If you have previously configured CuteFTP Pro to use more than one public key, ensure that the correct public key for this site is selected in the CuteFTP Pro SSH2 security settings area. If the remote FTP site is expecting a password in addition to a public key, ensure https://kb.globalscape.com/KnowledgebaseArticle10606.aspx that option is enabled in the CuteFTP Pro SSH2 security settings area. Ensure that the user account on the remote FTP server is configured with List and Show in List permissions. MORE INFORMATION/POSSIBLE CAUSES This error can be caused by any of the following: The SFTP Server may be rejecting the username/password combination that is being submitted to it. CuteFTP Pro may be providing the server with the wrong public key. The remote FTP site may be expecting a password in addition to the public key. The user may not have sufficient account privileges on the remote server. CuteFTP Pro’s newer SSH library (implemented in 8.3.3) may not be compatible with the SFTP server. Contact the Server Administrator to find out which software/version the SFTP server is running, then contact GlobalSCAPE Technical Support with this information. Also In This Category WebHelp not displaying properly in browser Does Globalscape have a replacement for CuteSITE Builder? SFTP connection fails when password not specified in CuteFTP Site Properties or Quick Connect bar Submit a Ticket to Support Can GlobalSCAPE products be exported from the United States? (ECCN and CCATS for GlobalSCAPE Products) Moving CuteFTP to a new computer Officially Supported Products and EOL Dates SSL Security Levels and CuteFTP FTP Status and Error Codes Can I use a Windows Command Prompt to send FTP Commands

error = #0. 0 Can't connect to sftp.xxxxx.com:22": http://kb.globalscape.com/KnowledgebaseArticle10606.aspx "SFTP21 error = #4 Algorithm negotiation failed": http://kb.globalscape.com/KnowledgebaseArticle10351.aspx "SFTP21 error = #4 No further authentication methods available": http://kb.globalscape.com/KnowledgebaseArticle10352.aspx "SFTP21 error = #7 Connection to the server sftp21 error was lost": http://kb.globalscape.com/KnowledgebaseArticle10353.aspx Related Topics Connecting to Secure Shell (SSH2) Sites Troubleshooting SFTP Connections Learning About SSH2 This online help file is for CuteFTP v9. For other versions, please refer to http://help.globalscape.com/help/index.html. (If the Index sftp21 error = and Contents are hidden, click Show Contents pane in the top left corner of this topic.) If this help topic did not help you, search the Knowledgebase or pose your question in the Globalscape User Forum. For the most up-to-date information, to view version history, updates, and activation instructions; or to download a PDF of this user guide, visit the Support Center at http://www.globalscape.com/support. Leave compliments or complaints regarding the help in the User Forum. At a minimum, please provide this topic title and why you needed help. For information about Globalscape, visit www.globalscape.com or follow us on Twitter. Last modified: 17-Jan-13 at 10:03:00