Proftpd 421 Service not available, remote server closed connection
the only thing i found on the web was that a possible hostname was bad. but my hostname works fine. my telnet works also, but
proftpd produces this 421 Service Error via command line.
ex: ftp example.com
Connected to example.com
421 Service not available, remote server has closed connection
I am not an expert with the proftpd.conf file but here is
what i have now, most settings are default.
# Includes DSO modules
# Set off to disable IPv6 support which is annoying on IPv4 only boxes.
# If set on you can experience a longer connection delay in many cases.
DisplayChdir .message true
# Use this to jail all users in their homes
# DefaultRoot ~
# Users require a valid shell listed in /etc/shells to login.
# Use this directive to release that constrain.
# RequireValidShell off
# Port 21 is the standard FTP port.
# In some cases you have to specify passive ports range to by-pass
# firewall limitations. Ephemeral ports can be used for that, but
# feel free to use a more narrow range.
PassivePorts 49152 65534
# If your host was NATted, this option is useful in order to
# allow passive tranfers to work. You have to use your public
# address and opening the passive ports used on your firewall as well.
# MasqueradeAddress 18.104.22.168
# This is useful for masquerading address with dynamic IPs:
# refresh any configured MasqueradeAddress directives every 8 hours
# DynMasqRefresh 28800
# To prevent DoS attacks, set the maximum number of child processes
# to 30. If you need to allow more than 30 concurrent connections
# at once, simply increase this value. Note that this ONLY works
# in standalone mode, in inetd mode you should use an inetd server
# that allows you to limit maximum number of processes per service
# (such as xinetd)
# Set the user and group that the server normally runs at.
# Normally, we want files to be overwriteable.
# Uncomment this if you are using NIS or LDAP via NSS to retrieve passwords:
# This is required to use both PAM-based authentication and local passwords
# AuthOrder mod_auth_pam.c* mod_auth_unix.c
# Be warned: use of this directive impacts CPU average load!
# Uncomment this if you like to see progress and transfer rate with ftpwho
# in downloads. That is not needed for uploads rates.
# UseSendFile off
# Delay engine reduces impact of the so-called Timing Attack described in
# It is on by default.
# Alternative authentication frameworks
# This is used for FTPS connections
# Deny writing to the base server...
# Bar use of SITE CHMOD by default