LIST and RETR FTP commands fails if 6tunnel is used as ftp proxy

[raghu328568]

ftp.connect("fdf8:f535:82e4::52", 21)
'220 pyftpdlib 1.5.6 ready.' ftp.login('ftp','password') '230 Login successful.' ftp.cwd('/RRHSIM6/logfiles/Full') '250 "/RRHSIM6/logfiles/Full" is the current directory.' ftp.retrlines('LIST') Traceback (most recent call last): File "", line 1, in File "/usr/lib64/python2.7/ftplib.py", line 437, in retrlines conn = self.transfercmd(cmd) File "/usr/lib64/python2.7/ftplib.py", line 376, in transfercmd return self.ntransfercmd(cmd, rest)[0] File "/usr/lib64/python2.7/ftplib.py", line 335, in ntransfercmd conn = socket.create_connection((host, port), self.timeout) File "/usr/lib64/python2.7/socket.py", line 571, in create_connection raise err socket.error: [Errno 111] Connection refused exit

proxy side: [root@ruproxy-6 /]# ./6tunnel -6 -l fdf8:f535:82e4::52 21 -4 169.254.6.2 21 -L 20 -v resolving 169.254.6.2 resolved to 169.254.6.2 resolving local address fdf8:f535:82e4::52 resolved to fdf8:f535:82e4::52 local: fdf8:f535:82e4::52,21; remote: 169.254.6.2,21; source: default

<4> connection from fdf8:f535:82e4:0:800::,51902 (no. 1) <4> connected to 169.254.6.2,21 <4> connection closed child process exited