ZModem standard:

    lrzsz is compatible with standard zmodem as long as you don't use

    certain options:

    -8 is incompatible with the standard, but should work with most

       DOS/Atari/Amiga ZModems. It's a common extension, but a dangerous

       one. Do not use it unless you know that the receiver can handle it.

    -S is incompatible with certain ZModems which use the TIMESYNC bit

       for other purposes (timesync is a protocol extension by Peter

       Mandrella, read timesync.doc for more information). The default

       is to disable timesync, you must use the `S' option to enable it.

Calling conventions:

    lrzsz is not fully compatible with older UNIX ZModems:

    - PUBDIR (/var/spool/uucppublic) is normally disabled. If you like

      public writable directories please use:

        configure --enable-pubdir=/var/spool/uucppublic

    - lrz defaults to restricted mode, in which the sender must not upload

      any files outside the working directory or PUBDIR (if pubdir is

      enabled). With the old version you had to set SHELL=rsh.

      For more information read the SECURITY paragraph in lrz.1.

    - lrz: remote command execution is disabled. To enable it use -C (but

      be careful - the sender might delete all your files).

    - lrz: does not set executable bits for any files it received under

      a restricted shell.