which software available on NT 4.0

[J. van Beek]

We have a client and a server NT 4.0 environment on a token ring base
network on IPv6. We want to test especially the Quality Of Service facility
of IPv6.

On the workstation it is possible to ping6 the server and by using the
Netmon application it looks as if there is a tunnel between the client and
the server.
(IPv6 encapsulated in IPv4) However it is clear of seeing the IPv6 headers
in the data. 

We want to use a FTP and a FTP daemon on IPv6 base for the NT 4
environment. Just for making a big file xfer to the server. Meanwhile we
want to use a TELNET application on IPv6 base to get profit of the QOS
feature.

Is there any public software available for testing?