ftp problem

[Paal Marker <paal barum folkebibl no>]

redhat 8

Got one workstation and one laptop both with rh8. connected hub.

Can only connect them as anonymous by ftp. By logging as user I get the 
message:  
"Must perform authentication before identifying user" Then it disconnects.

By searching google I have found that it might be a firewall restriction 
that cause the problem. But no more excact then that.

How do I solve this?