oreilly.comSafari Books Online.Conferences.

Apache FAQ
Linux FAQ

Log in to particpate

   Linux FAQ > 7. Solutions to Common Miscellaneous Problems
Question:  7.1. FTP Transfers Seem to Hang.

FTP transfers that die suddenly are due, apparently, to some form of overrunning buffer. It occurs both with Linux and Microsoft servers. On Linux systems, The problem seems to occur most commonly with the distribution's server software.

If you receive ftp: connection refused errors, then the problem is likely due to a lack of authentication. Refer to "FTP or Telnet Server Won't Allow Logins.."

One remedy is to be replacing the distribution FTP server with the Linux port of the OpenBSD FTP server. The home page is:

To install the BSD server, follow the installation instructions, and refer to the manual pages for inetd and inetd.conf. (If you have the newer xinetd, see below.) Be sure to tell inetd to run the BSD daemon alone, not as a subprocess of, for example, tcpd. Comment out the line that begins "ftp" in the /etc/inetd.conf file and replace it with a line similar to (if you install the new ftpd in /usr/local/sbin/):

# Original entry, commented out.
#ftp    stream  tcp nowait  root    /usr/sbin/tcpd /usr/sbin/in.ftpd
# Replacement entry:
ftp stream  tcp nowait  root    /usr/local/sbin/ftpd -l

The replacement daemon will become effective after rebooting or sending (as root) a SIGHUP to inetd, e.g.:

# kill -HUP inetd

To configure xinetd, create an entry in /etc/xinetd.d per the instructions in the xinetd.conf manual page. Make sure, again, that the command-line arguments for ftpd are correct, and that you have installed the /etc/ftpusers and /etc/pam.d/ftp files. Then restart xinetd with the command: /etc/rc.d/init.d/xinetd restart. The command should report "OK," and the restart will be noted in the system message log.

This FAQ is from Linux Frequently Asked Questions with Answers, maintained by Robert Kiesling

Sponsored by: