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Hi Frédéric, whein I execute strace I didn't see open("/usr/lib/libldap.so.2", O_RDONLY) = 3 And with the command lsof | grep ftp-proxy I see: ftp-proxy 2807 root cwd DIR 104,3 4096 2 / ftp-proxy 2807 root rtd DIR 104,3 4096 2 / ftp-proxy 2807 root txt REG 104,3 62040 368894 /usr/sbin/ftp-proxy ftp-proxy 2807 root mem REG 104,3 90088 160353 /lib/ld-2.3.2.so ftp-proxy 2807 root mem REG 104,3 24328 160430 /lib/libwrap.so.0.7.6 ftp-proxy 2807 root mem REG 104,3 1244016 160362 /lib/libc-2.3.2.so ftp-proxy 2807 root mem REG 104,3 73528 161054 /lib/libnsl-2.3.2.so ftp-proxy 2807 root 0r CHR 1,3 64278 /dev/null ftp-proxy 2807 root 1w CHR 1,3 64278 /dev/null ftp-proxy 2807 root 2w CHR 1,3 64278 /dev/null ftp-proxy 2807 root 3u IPv4 93318053 TCP intern:2121 (LISTEN) ftp-proxy 2807 root 4u REG 104,3 2899 289583 /var/log/ftp-proxy.log Well, I think I must compile the ftp-proxy. What do you think?