We are looking into this and will post a response as soon as we have some more information. As always, thanks for the notification!! Jon Lindberg NSS -----Original Message----- From: Bill Fenner [mailto:fenner@xxxxxxxxxxxxxxxx] Sent: Thursday, July 06, 2006 10:46 AM To: Ken Raeburn Cc: wgchairs@xxxxxxxx; ietf Mailing List Subject: Re: IETF IPv6 platform configuration My recent experiences with ftp.ietf.org: EPSV doesn't work - it gives a port which it then isn't listening on (or, more likely since we get no response at all, a firewall blocks connections to): ftp> ls ---> EPSV 229 Entering Extended Passive Mode (|||42065|) ftp: connect for data channel: Operation timed out [simultaneously in another window] compost% telnet ftp.ietf.org 42065 Trying 156.154.16.149... telnet: connect to address 156.154.16.149: Operation timed out EPRT for IPv4 doesn't work - it returns an error "Bad EPRT protocol." ---> EPRT |1|192.20.225.40|56318| 500 Bad EPRT protocol. Apparently, the FTP server doesn't want to allow EPRT with IPv4. ("1" is IPv4). It's not using the 522 "I don't support that protocol" error code, but is also saying that it doesn't support that protocol. PORT doesn't work - it returns an immediate error "Failed to establish connection". ---> PORT 192,20,225,40,219,254 200 PORT command successful. Consider using PASV. ---> LIST 425 Failed to establish connection. tcpdump shows that it didn't send any packets trying to establish a connection to 192.20.225.40 and the 425 error comes too quickly to have tried. It looks like 3 out of 4 data channel establishment mechanisms are broken with this FTP server software and configuration for IPv4. I didn't test with IPv6. Bill _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf