Tente isto:
echo "10000 11000" > /etc/pure-ftpd/conf/PassivePortRange
Encontrei isso lendo a página de manual para pure-ftpd-wrapper
:
pure-ftpd-wrapper reads the configuration for the Pure-FTPd daemon from files in the directory /etc/pure-ftpd/conf. Each file in this directory is related to a command line option. ... Two numbers "AnonymousRatio", "LimitRecursion", "PassivePortRange",
Eu fui direcionado para essa página do manual por /usr/share/doc/pure-ftpd/README.Debian
(que eu encontrei olhando por dpkg -L pure-ftpd|grep -i doc
:
pure-ftpd for Debian
Please note that these packages use a complete new configuration scheme, read the pure-ftpd-wrapper manual page for more information.