Error 421 Service Not Available Closing Control Connection
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421 Service Not Available, Remote Server Has Closed Connection Vsftpd
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421 Service Not Available Remote Server Has Closed Connection Login Failed
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are UTC 421 Service not available, remote server has closed connecti Moderator: Project members Post new topic Reply to topic Page 1 of 1 [ 5 posts ] Print view Previous topic | Next topic Author Message reidler
421 Service Not Available Exchange 2010
Post subject: 421 Service not available, remote server has closed connectiPostPosted: 2010-03-17 14:52 Offline 504
421 Service Not Available Closing Transmission Channel
Command not implemented Joined: 2010-02-12 20:04 Posts: 6 First name: Eli Last name: Reidler Hi.I have a FileZilla FTP server running on a 421 service not available remote server has closed connection passive mode refused machine. If I access the server from another machine on the same local network via the local network address (192.168.0.2) it's ok. I also set it up to be accessed from an outside internet address. It's behind https://community.hpe.com/t5/Networking/ftp-problem-421-service-no-available/td-p/3126898 a firewall router using port forwarding. It's DLINK 625. I opened the FTP port and have it forwarding to this machine. It worked for a while. The it suddenly stopped. I connect ok and get passed the user and password. Then I tried commands: ls and dir It returned: 200 Port command successful but then it hung for a while and then returned this error message: 421 Service not available, remote server has closed connection.I tried https://forum.filezilla-project.org/viewtopic.php?t=15359 it repeatedly with the same result. At the same time I also tried again from another local network address and the dir command worked ok. Is this an internet network problem?Is the server trying to use a second port that I did not open on the router? Do I need to open other ports?Thanks.Eli Top Profile Reply with quote boco Post subject: Re: 421 Service not available, remote server has closed connectiPostPosted: 2010-03-18 01:52 Online Contributor Joined: 2006-05-01 03:28 Posts: 22696 Location: Germany Quote:421 Service not available, remote server has closed connection.This is not from FileZilla Server, I guess.Please read Network Configuration. _________________### BEGIN SIGNATURE BLOCK ###No support requests per PM! You will NOT get any reply!!!FTP connection problems? Do yourself a favor and read Network Configuration.All FileZilla products fully support IPv6. http://worldipv6launch.org### END SIGNATURE BLOCK ### Top Profile Reply with quote reidler Post subject: Re: 421 Service not available, remote server has closed connectiPostPosted: 2010-03-18 03:56 Offline 504 Command not implemented Joined: 2010-02-12 20:04 Posts: 6 First name: Eli Last name: Reidler Well thank you. I did not know about the network configuration guide. I read it and learned a lot about it. I have a much better understanding. I had suspected something of the sort that maybe a secondary port was being opened which my NAT was blocking.So
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow http://stackoverflow.com/questions/21646178/the-remote-server-returned-an-error-421-service-not-available-closing-contro the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up The remote server returned an error: (421) Service not available, closing control connection up vote 1 down vote 421 service favorite I am running this code for alot of files to transfer locally to another server via ftp. The problem is I am periodically getting the error The remote server returned an error: (421) Service not available, closing control connection. Is there a problem with the code, a better way to transfer the files that is quicker more efficient. All the files need to be transfered so I was thinking a while 421 service not loop and catching the error until all files in the folder have transfered. It is a periodic error I am getting: foreach (FileInfo file in files) { try { // Get the object used to communicate with the server. FtpWebRequest request = (FtpWebRequest) WebRequest.Create(String.Format("{0}{1}/{2}", Host, destinationPath, file.Name)); request.Method = WebRequestMethods.Ftp.UploadFile; request.KeepAlive = false; /* 20 mins timeout */ request.Timeout = 1200000; request.ReadWriteTimeout = 1200000; // This example assumes the FTP site uses anonymous logon. request.Credentials = new NetworkCredential(Username, Password); // Copy the contents of the file to the request stream. byte[] fileContents = File.ReadAllBytes(file.FullName); request.ContentLength = fileContents.Length; using (Stream requestStream = request.GetRequestStream()) { requestStream.Write(fileContents, 0, fileContents.Length); } //using (FtpWebResponse response = (FtpWebResponse) request.GetResponse()) //{ //} if (deleteSourcePath) { File.Delete(file.FullName); } } catch (Exception ex) { // Log.Warn("Error Moving Images", ex.Message); } } c# ftp share|improve this question edited Feb 8 '14 at 13:19 Chris Schiffhauer 9,09194465 asked Feb 8 '14 at 12:50 Matthew Chambers 2511821 Seems that one can judge the quality of a code snippet by the number of exception-eating catch statements. –Uwe Keim Sep 5 '14 at 17:43 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote Call Close on the the FtpWebResponse object. That will release the associated port. FtpWebResponse response = (FtpWebResponse) re