Frequently Asked Questions
Does NcFTPd just cease to work when the 30-day evaluation period
expires? [Answer]
Is it possible to get an extension on the 30-day evaluation? [Answer]
Am I allowed to move my license to a different machine and/or operating
system? [Answer]
Am I allowed to upgrade to new versions of NcFTPd for free? [Answer]
Before I purchase the unlimited-user license, I need to be sure I’m
satisfied that NcFTPd will perform under a high user load.
How do I test that with the trial version? [Answer]
I ordered an unlimited-user license but I still only have 50 users!
[Answer]
Can I buy the 50-user license now and upgrade to the unlimited-user
license later by paying the difference? [Answer]
If I want 100 simultaneous users, can I buy two
50-user licenses and aggregate the license data? [Answer]
I entered my licensing information but NcFTPd is still saying
“unregistered!” [Answer]
How do I register NcFTPd for the free educational license? [Answer]
How do I know if my machine qualifies under the free educational license?
[Answer]
How do I register NcFTPd for the free personal-use license? [Answer]
My company would like to use NcFTPd, but we don’t need more than 3
simultaneous connections. Is it OK
to use the free personal license? [Answer]
Is free technical support available for the educational or personal-use
license? [Answer]
For the 50-user license, is it 50 concurrent users, or 50 users in the
passwd file (or ncftpd_passwd database)? [Answer]
NcFTPd seems to listen on all IP addresses for the machine.
Can I configure NcFTPd so it only listens on certain addresses?
[Answer]
Can NcFTPd utilize two or more networking interfaces in a multi-homed
machine? [Answer]
What’s a good way to prevent the same user from logging in 10 times and
hogging 10 connections to himself? [Answer]
How do I disable “ls” so a user can’t browse the directory structure?
[Answer]
How do I force a user to use a web browser rather than an FTP client? I
don’t want them to be able to access the same file once they know where it is
on the server. [Answer]
How high can I set my NcFTPd max-users in the general.cf?
[Answer]
Can I configure NcFTPd so that certain symbolic links are allowed that
point outside of the home directory of a restricted user? [Answer]
How do I hide .dotfiles from users?
[Answer]
How can I allow users to create directories in the /incoming
directory? [Answer]
Can NcFTPd run as some other user rather than root? [Answer]
How can I get my FTP server to work with my firewall? [Answer]
How can I configure NcFTPd to use a specific port range for passive
data connections? [Answer]
What kind of advanced features are available? [Answer]
Does NcFTPd allow a user to
resume failed downloads? [Answer]
Is it possible to have 2 virtual
hosts with only one IP address? [Answer]
Are disk quotas supported?
[Answer]
Are bandwidth limits supported?
[Answer]
Does NcFTPd support group logins using SITE GROUP and SITE GPASS?
[Answer]
Does NcFTPd support any concept of a user class? [Answer]
Does NcFTPd support international character sets? [Answer]
Can the TCP Wrappers support built-in to NcFTPd act on a per-domain
or per-user basis? [Answer]
Is the SIZE command is supported
under ASCII mode? [Answer]
Do different users behind a proxy server count as the same user for the
max-users-per-ip option? [Answer]
Can client programs use pathnames
with ~username notation? [Answer]
Why doesn’t NcFTPd implement upload/download ratios? [Answer]
Users are unable to login. How do I diagnose the problem? [Answer]
What are Virtual Users and why should I use them? [Answer]
Does NcFTPd support LDAP? [Answer]
How can I use my MySQL/mSQL/Oracle/etc database to authenticate
users? [Answer]
So if NcFTPd doesn't do MySQL/mSQL/Oracle/etc, then what is this NcFTPd
Password Database you're talking about? [Answer]
Does NcFTPd support Pluggable Authentication Modules (PAM)?
[Answer]
How does NcFTPd's custom authentication work? [Answer]
How can I have NcFTPd use only a password database for
authentication? I don’t want
users in /etc/passwd to be able to FTP in. [Answer]
Can I tell NcFTPd to authenticate users from both the system password
file and a NcFTPd password database? [Answer]
Can I tell NcFTPd to authenticate users from a text file in the same
format as /etc/passwd? [Answer]
Is NcFTPd limited to usernames of 8 characters or less? [Answer]
How do I shutdown NcFTPd? I'm running version 2.7.0 or later. [Answer]
How do I restart NcFTPd? I'm running version 2.7.0 or later. [Answer]
How do I restart or shutdown NcFTPd? I'm running version 2.6.3
or earlier. [Answer]
How do I shutdown NcFTPd and not have it start up again
automatically? [Answer]
How do I “tickle” NcFTPd so it reloads it’s configuration
files? [Answer]
Can NcFTPd automatically lock out users who fail to enter in a
correct password? [Answer]
Can users change their password from FTP? If not, how about a custom
SITE command to let them do this? [Answer]
Can NcFTPd password database users have their password expire?
[Answer]
How do I change NcFTPd so it doesn’t create all those subdirectories
when it logs? [Answer]
What's a good way to rotate the logs? [Answer]
NcFTPd is displaying
directory listings with the wrong timezone! [Answer]
How many ncftpd processes will be running simultaneously? [Answer]
Are there any caveats about using NFS-mounted filesystems and NcFTPd?
[Answer]
How can I terminate a logged in user without restarting the whole server?
[Answer]
How do I put NcFTPd into verbose mode so it generates debugging
output in the logs? [Answer]
How can I use verbose logging mode to diagnose a
problem? [Answer]
Users are unable to login. How do I diagnose the problem? [Answer]
Some of the entries in the xfer logs are denoted INCOMPLETE.
What does this mean? [Answer]
I’m getting “permission denied” when I try to transfer a file.
I have checked the permissions and everything appears OK.
What could be wrong? [Answer]
NcFTPd takes a very long time to startup!
Specifically, it seems to hang while "Preloading
users and groups." [Answer]
I want to use TCP Wrappers access control with NcFTPd so I tried to
run NcFTPd from the inetd.conf file.
It doesn’t work. [Answer]
I'm getting poor performance
when doing large numbers of small transfers. [Answer]
I'm getting "respawning too
fast" errors. What does this mean? [Answer]
Directory listings fail with “Only
ls flags accepted are -C, -F, -l, -t, -r, -1, -S, -L, -R, and –p.”
[Answer]
I noticed that NcFTPd logged the error “shared
memory pool [key 0x77c0ffee] already
exists! Removed it.” What
does this mean? [Answer]
I’m running NcFTPd on
Solaris and it doesn’t startup when I have a large number of users (> 300).
I also see “shared memory pool creation failed: Invalid argument” in
the logs. [Answer]
When I try to startup NcFTPd I get the error “set-name variable on
line 39 of /etc/ncftpd/general.cf needs to be set in individual domain
configuration files”. [Answer]
I try to run NcFTPd but it just exits after a few seconds. [Answer]
What do "bind failed: Address in use" errors mean when I
start the server? [Answer]
Trying to connect to the server errs out with "connection
refused." [Answer]
Does NcFTPd work with NFS-mounted filesystems? Users get kicked out immediately after logging in. [Answer]
Users can login, but directory listings and file transfers fail. [Answer]
Established connections which have been alive for a long time are timing-out
before they complete. Could my firewall be to blame? [Answer]
My Nessus security scanner is reporting vulnerabilities. [Answer]
Is NcFTPd compiled using the StackGuard
compiler, and if not, will it be in the future? [Answer]
Does NcFTPd support any kind of encryption to prevent packet sniffers
from stealing passwords or data? [Answer]
NcFTPd allows data connections to a different IP address from the
control connection! [Answer]
Miscellaneous
Is the format of the logs
documented anywhere? [Answer]
Do I have to use NcFTP Client with NcFTPd Server?
[Answer]
