Configure the vsftpd pasvenable, pasvminport and pasvmaxport settings to a range of ports, and then VirtualBox port forward those ports. You will also need to set the vsftpd pasvaddress setting (set it to the VM's 'external' IP address - which is the host's IP address).

. VSFTP Not Allowing External Connections.Welcome! If this is your first visit, be sure to check out the. You will have to before you can post in the forums. (Be aware the forums do not accept user names with a dash '-') Also, logging in lets you avoid the CAPTCHA verification when searching.

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NOTICE: openSUSE Forums in the process of moving to Nuremberg infrastructure. We are now on the move, for more information see the announcement here:. FORUM IS NOW READ ONLY for new posts/threads. Code: # Example config file /etc/vsftpd.conf## The default compiled in settings are fairly paranoid.

The clue is the PORT command that failed at the end. As you see it asked the client to connect to a private address 192,168,1,101 for the data connection. This obviously doesn't work for clients that are outside the firewall. What the client should see is a PORT command to connect to the externally visible address of the FTP server + port that is NATed to the internal address + port.Normally this is taken care of by the firewall by a NAT module that modifies the command stream and transparently replaces the internal IP with the external IP. Linux firewalls use the nfconntrackftp iptables module, but if you have some other kind of firewall, it may or may not be supported.Here is an explanation of active and passive FTP. This also shows you why FTP is a pain to support through firewalls. Code: # Example config file /etc/vsftpd.conf## The default compiled in settings are fairly paranoid.

Interesting,But I have a question why you believe that changing port 20 to something else significantly improves security. Port 21 is the port used for initializing an FTP session, port 20 is only used for the secondary connection (data transfer) for Active FTP. Unless some idiot is banging away trying to cause a Denial of Service, I don't see how changing the port improves security. Also, port 20 should be irrelevant for PASV FTP, I think you should know this already because you've configured your range of ports for data connections.If you really meant you were not using port 21, the improved security is still likely minimal at best.

It's trivial nowadays for port scanners and exploits to test ports for the actual service behind so it's probably makes more sense to just leave Services configured with their default settings.Would be interested in your idea behind this port change.TIA,Tony. Everything you say is perfectly correct. Excel for free on mac.

With most good port scanners these days it ain't going to make a slight bit of difference. However from security experience, I've found most script kiddies will mass scan IP ranges and because of the time involved in scanning every port, will tend to limit the search to 1 - 1024 range, as they are looking for a 'quick attack'.

It's also partly habit as when I used to run a FTP server under Windows I used to get a fair amount of abuse traffic mainly from Russian IP ranges, although I wouldn't really class it as DoS level, from default ports, so got into habit of changing them.Basically it doesn't really cost me anything, but has a slight chance of making attackers job harder, or dettered, so why not?Last edited by jkraw90; 06-Oct-2011 at 20:35.Reason: Typo. Sorry for reopen this thread so later but is the first in a google search and i want to add information.I have configured an vsftpd with openSUSE 12.2 32bit.

I configured automatically FTP Server with Yast but for a few days i couldn't connect externally from from my local network. I tried all and this is the best thread to configure it but i have to add that the order in the configuration file is so important. I tried pure-ftpd but without sucess, always timeout without welcome message.First I add at the end of configuration file the pasvaddress and pasvresolve but this not solve the problem. The order in the file must be first configuration and then enable.