I checked the wuftp FAQ's and threads and am still having the problem mentioned
in the subject line above on Solaris 8. Here is what I have done thus far:

  - In /etc/inetd.conf I made sure that tcp6 was replaced by tcp
    (then `pkill -HUP inetd`);

  - TCP wrappers are not invoved;

  - I can see the client connection on port 21 via snoop, but
    disconnection immediately follows with the
    "421 Service not available, remote server has closed connection"
    message.

    "netstat -a" also indicates the service is waiting "on port
    21" on the server.

  - I also tried it without inetd involvement as follows:
    (1) take the ftp service out of inted control first.
    (2) then start it on the command line as simple
        as possible:  /usr/local/sbin/in.ftpd -S -A -p 21 -P 20

     Still the same problem.

Note that I downloaded the Solaris 8 binaries from sunfreeware.com
and the version is "Version wu-2.6.2(6)"

Finally, I saw something about potential PAM authentication
problems for linux; perhaps the same here.

Would appreciate any suggestions.

BTW... The client is a regular Solaris 8 ftp client (/usr/bin/ftp)

Thanks.

You might want to try alt.ftp-servers