2.6. AIX Installation¶
For AIX systems, SFTPPlus is distributed as a gzipped TAR archive. Installing SFTPPlus consists of unpacking the archive, initializing the configuration, and generating the SSH keys and the SSL key and certificate to be used by the product.
The included default configuration requires the creation of a system account, named sftpplus, under which the SFTPPlus process is executed.
Optionally, you may choose to start SFTPPlus as root, but the sftpplus user is still required in order to drop privileges after starting up.
To have SFTPPlus launched at boot, you may use the included SysV init script.
All steps beyond unpacking the archive can be handled by the shell script
./bin/install.sh in the hierarchy of SFTPPlus files.
After downloading the compressed archive, you can extract its files using the following command:
gunzip -cd xfz sftpplus-os-arch-version.tar.gz | tar -xf -
To install SFTPPlus, move (or copy/link) the unpacked directory to your
preferred installation path, for example:
SFTPPlus may be installed in any location on the local file system.
In this documentation page we assume that SFTPPlus is unpacked in the
/opt/sftpplus directory (we discuss INSTALL_ROOT more later).
Avoid using spaces or special characters in the SFTPPlus installation path.
The easiest way to install SFTPPlus is to execute the shell script
bin/install.sh in the hierarchy of SFTPPlus files,
After a successful installation using the shell script, jump to Listening on privileged ports to learn how to enable SFTPPlus to listen on privileged ports. This would be needed if SFTPPlus is not started with superuser privileges, which would mean it cannot bind ports below 1024.
When installing SFTPPlus on a machine for the first time, you need to generate the initial configuration file and machine-specific SSH keys. A self-signed SSL certificate will also be generated to help with the initial FTPS and HTTPS testing.
To initialize a fresh SFTPPlus installation, execute the following command (where $ADMIN should be replaced with your favourite administrative username and $PASS with a password to be used for the SFTPPlus $ADMIN user):
cd /opt/sftpplus ./bin/admin-commands.sh initialize --init-admin $ADMIN --init-password $PASS
Default configuration allows external connections to the management web page. Therefore, use a secure password to protect the management web page.
If you don't want to allow external connections to the Local Manager web-based console, append the --local-admin-access command line argument to the initialization command above:
./bin/admin-commands.sh initialize \ --local-admin-access \ --init-admin $ADMIN \ --init-password $PASS
The initialization step is not required when upgrading SFTPPlus. It will not overwrite the configuration file, SSH keys, and SSL keys and certificates, if existing. In the case that you want to generate a new configuration, manually remove the existing files first.
For improved security, SFTPPlus is started by default under a regular account. This requires a dedicated operating system account to be created.
In the following examples, we use the default configuration value of
sftpplus for the name of the user to run SFTPPlus.
To create an
sftpplus group and user on AIX:
mkgroup sftpplus mkuser sftpplus usermod -g sftpplus -d /opt/sftpplus -s /bin/sh -c "SFTPPlus" sftpplus
You need to adjust the ownership of the files to match the newly created OS user:
cd /opt && chown -R root:adm sftpplus cd /opt/sftpplus && chown -R sftpplus:sftpplus configuration log run
At the very least, SFTPPlus needs read access to all the files under /opt/sftpplus, but in a typical installation it also requires write permission to the log/ subdirectory (for logging) and the configuration/ subdirectory (for saving changes to the running configuration). If running at all times under an unprivileged account, write permissions to the run/ sub-directory holding the PID file are needed as well.
For SysV-compatible operating systems such as AIX, a sample init script is provided.
Make sure the script is executable, then amend the INSTALL_ROOT variable to the installation path of your SFTPPlus instance.
Copy the modified script to the standard location used by the initialization system of your distribution:
cd /opt/sftpplus vi bin/sftpplus-mft.sysv.sh chmod +x bin/sftpplus-mft.sysv.sh cp bin/sftpplus-mft.sysv.sh /etc/rc.d/init.d/sftpplus-mft
Then you can call the script directly as:
The following COMMANDs are available:
debug (start without detaching from current console)
To start SFTPPlus automatically on boot:
ln -s /etc/rc.d/init.d/sftpplus-mft /etc/rc.d/rc2.d/S99sftpplus-mft
When running SFTPPlus as a regular user, it's not possible to bind privileged ports in the range 0-1024.
One generic method which works on any Unix-like system is to set up SFTPPlus to listen only on ports above 1024, then set up port-forwarding in your firewall configuration.
There is also an FAQ section if you have an idea, but are in search of answers.