6. Configure the /etc/ftpconversions file

The /etc/ftpconversions file contains instructions that permit you to compress files on demand before the transfer.

  1. Edit the ftpconversions file, vi /etc/ftpconversions and add in this file the following lines:

            :.Z:  :  :/bin/compress -d -c %s:T_REG|T_ASCII:O_UNCOMPRESS:UNCOMPRESS
            :   : :.Z:/bin/compress -c %s:T_REG:O_COMPRESS:COMPRESS
            :.gz: :  :/bin/gzip -cd %s:T_REG|T_ASCII:O_UNCOMPRESS:GUNZIP
            :   : :.gz:/bin/gzip -9 -c %s:T_REG:O_COMPRESS:GZIP
            :   : :.tar:/bin/tar -c -f - %s:T_REG|T_DIR:O_TAR:TAR
            :   : :.tar.Z:/bin/tar -c -Z -f - %s:T_REG|T_DIR:O_COMPRESS|O_TAR:TAR+COMPRESS
            :   : :.tar.gz:/bin/tar -c -z -f - %s:T_REG|T_DIR:O_COMPRESS|O_TAR:TAR+GZIP
            :   : :.crc:/bin/cksum %s:T_REG::CKSUM
            :   : :.md5:/bin/md5sum %s:T_REG::MD5SUM

  2. Now, change its default permissions to be 600:

              [root@deep ] /# chmod 600 /etc/ftpconversions

6.1. Configure the /etc/pam.d/ftp file

Configure your /etc/pam.d/ftp file to use pam authentication by creating the /etc/pam.d/ftp file and add the following lines:

          auth       required     /lib/security/pam_listfile.so item=user sense=deny file=/etc/ftpusers onerr=succeed
          auth       required     /lib/security/pam_pwdb.so shadow nullok
          auth       required     /lib/security/pam_shells.so
          account    required     /lib/security/pam_pwdb.so
          session    required     /lib/security/pam_pwdb.so