Error 421 Service Not Available Remote Server Has Closed Connection
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421 Service Not Available Remote Server Has Closed Connection Proftpd
Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Why do I get kicked out of a FTP session once I run a command? up vote 6 down vote favorite 3 Why do I get kicked out of a FTP session once I run a command? It seems that once I successfully login into a server is 421 service not available remote server has closed connection solaris get the following after running a command such as "ls" (I've enclosed the error portion in the "[ERROR]" tags): allen92@allen92-VirtualBox:~/Videos$ ftp -n ftp.FreeBSD.org Connected to ftp.FreeBSD.org. 220 beastie.tdk.net FTP server (Version 6.00LS) ready. ftp> user (username) anonymous 331 Guest login ok, send your email address as password. Password: 230 Guest login ok, access restrictions apply. Remote system type is UNIX. Using binary mode to transfer files. ftp> ls [ERROR] 421 Service not available, remote server has closed connection [ERROR] ftp> This seems to happen on any remote FTP server. Everything works fine when I login onto the local machine and run FTP commands. If in fact the "421" error is a generic error, is there any way to find out the source of the problem? Any leads on this would be appreciated. I haven't been able to find any support on this particular issue. Anybody with an similar problem please share your thoughts. NOTE: I have VSFTPD installed. ftp share|improve this question edited Apr 27 at 18:30 Anthon 47.4k1462125 asked Sep 13 '13 at 8:45 AllenD 3723612 add a comment| 2 Answers 2 active oldest votes up vote 7 down vote accepted There is most likely a
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421 Service Not Available Smtp
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The Remote Server Returned An Error 421 Service Not Available Closing Control Connection
minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top FTP from Linux gives “421 service not available, remote server has closed connection” http://unix.stackexchange.com/questions/90487/why-do-i-get-kicked-out-of-a-ftp-session-once-i-run-a-command up vote 1 down vote favorite I tried to FTP to my hosting account from my Ubuntu machine, and got the following error, before I even got a login prompt: $ ftp tora.us.fm Connected to tora.us.fm. 421 Service not available, remote server has closed connection ftp> quit I asked them if there is a problem with the FTP, but they checked it from a Windows machine and showed me that they can connect OK. I can connect http://superuser.com/questions/308024/ftp-from-linux-gives-421-service-not-available-remote-server-has-closed-connec to the same host using ping, so it's probably not a network problem: $ ping tora.us.fm PING tora.us.fm (64.79.220.195) 56(84) bytes of data. 64 bytes from tora.us.fm (64.79.220.195): icmp_seq=1 ttl=47 time=169 ms 64 bytes from tora.us.fm (64.79.220.195): icmp_seq=2 ttl=47 time=169 ms 64 bytes from tora.us.fm (64.79.220.195): icmp_seq=3 ttl=47 time=171 ms ^C Is it possible that there is a problem to connect to FTP from Linux? ubuntu ftp share|improve this question asked Jul 8 '11 at 8:57 Erel Segal-Halevi 43561025 migrated from stackoverflow.com Jul 8 '11 at 9:15 This question came from our site for professional and enthusiast programmers. add a comment| 2 Answers 2 active oldest votes up vote 1 down vote accepted First of all, ping isn't really a connection. Think of it as the radar of the networking world. Just because something responds to it, doesn't mean you'll actually be able to get into that something. Onto the problem at hand. I get a login prompt from that host with both a windows (Win7) machine and a linux system (Gentoo). This indicates that the FTP server software is accepting connections. The next step of the ftp process should be the authentication. Obviously, I don't have an account to login with, does your ftp client automatically login to the host? Is it using the credentials provided by your host or attempting to login anonymously? Have you tried any other F
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FTP server won't allow logins, it is probably configured correctly, but the problem is probably with authorizing users at login. FTP servers in current distriubtions often authorize users with the Pluggable Authentication Modules library, in which case there should be an authorization file /etc/pam.d/ftp. A generic authorization file looks like this. (The line break on the first "auth" line is for readability. The entry is actually a single, long line). #%PAM-1.0 auth required /lib/security/pam_listfile.so item=user \ sense=deny file=/etc/ftpusers onerr=succeed auth required /lib/security/pam_pwdb.so shadow nullok auth required /lib/security/pam_shells.so account required /lib/security/pam_pwdb.so session required /lib/security/pam_pwdb.so Also, make sure the /etc/ftpusers file, or whatever users file is named in the first "auth" line, is configured correctly. Btw, the sample ftp file above is actually theftpd/ftp.pam.sample file from the ftpd-BSD-0.3.1.tar.gz package. Many thanks to David A. Madore for this much needed port. This FAQ is from Linux Frequently Asked Questions with Answers, maintained by Robert Kiesling Sponsored by: © 2016, O'Reilly Media, Inc. (707) 827-7019 (800) 889-8969 All trademarks and registered trademarks appearing on oreilly.com are the property of their respective owners. About O'Reilly Sign In Academic Solutions Jobs Contacts Corporate Information Press Room Privacy Policy Terms of Service Writing for O'Reilly Community Authors Community & Featured Users Forums Membership Newsletters O'Reilly Answers RSS Feeds User Groups Partner Sites makezine.com makerfaire.com craftzine.com igniteshow.com PayPal Developer Zone O'Reilly Insights on Forbes.com Shop O'Reilly Customer Service Contact Us Shipping Information Ordering & Payment The O'Reilly Guarantee