421 Service not available

[Trace Trembath]

OpenVMS 7.2-1, TCP/IP Services V5.1 ECO5

We have a procedure that copies a 126 block file from one OpenVMS machine to another. Sometimes we copy multiple 126 block files to the same server. However, sometimes we get the following error and no file gets copied:

421 Service not available, Remote server has closed the connection

I've searched around and it looks like Passive FTP might help. I know that I can set mode to passive if I run FTP interactively, as in

$FTP
FTP>set passive on

However, we use the copy/ftp command for our FTP copies.

Can I modify the FTP server of TCPIP Services for OpenVMS to always use passive mode?
How else could I set passive mode if I'm using the copy/ftp command?

Many thanks.

Trace

[Volker Halle]

Trace,

more recent versions of TCPIP (e.g. V5.3) support COPY/FTP/PASSIVE

Volker.

[Trace Trembath]

Volker,

Do you know if setting passive mode for FTP transfers might fix the root problem that is giving me the 421 error shown above? Thanks.

Trace

[Wim Van den Wyngaert]

Trac,

You should check on the system that closed the connection WHY it closed the connection.

Check operator.log and process termination status in accounting.

Also : network connection (full/half duplex), firewall in between might disconnect in name of the other side.

Wim

[Antoniov.]

Trace,
421 error happens before you start copy or during copy?
On target host do you saw some statistics for example netstat -i or netstat -d?
Don't forget the mainly trouble of ftp is not the ftp but autonegotiation of interfaces.
For furthermore help you can read here
http://h71000.www7.hp.com/doc/tcpip51/6631/6631pro.html#symp_sec

Antonio Vigliotti