>Hm, not really:
>
>azenomei:~$ ftp ftp.netbsd.org
>Trying 2001:4f8:4:b:2e0:81ff:fe21:6563...
>Connected to ftp.netbsd.org.
>220 2001:4f8:4:b:2e0:81ff:fe21:6563 FTP server (NetBSD-ftpd 20020615) ready.
>Name (ftp.netbsd.org:rhialto): ftp
>331 Guest login ok, type your name as password.
>Password:
>230-
>
>421 Service not available, remote server timed out. Connection closed
>ftp: Login failed.
>ftp> 
>
>Earlier, I could log in but not do file transfer - some message about
>unable to assign requested address, with the IPv6 address of
>ftp.netbsd.org in it.

	do you have reverse lookup table setup for your client?

itojun