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Rob

Oh dear. Your message above made me realise that I had not started FTP on
the remote server. Lesson 1, page 1 that I should know. I don't keep FTP
servers running permanently and end them when they are not in use. Now it
is working fine.

Many thanks for everyone's help

Rob

On 26 April 2016 at 19:01, Rob Berendt <rob@xxxxxxxxx> wrote:

<snip>
What causes port 21 to appear in the list?
</snip>

Starting the ftp server.
STRTCPSVR SERVER(*FTP)
If you look at the joblog of the job which runs that command you should
see something like:

strtcpsvr *ftp
Job 240762/QTCP/QTFTP00018 submitted to job queue QSYSNOMAX in library
QSYS.
FTP server starting.

Then you should be able to do a WRKJOB on that job. If it is not active
that's not a good sign. Look at it's joblog. It may spawn off some
additional ftp server jobs to help with multiple people doing ftp at a
time.


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: Rob Dixon <robertsdixon@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 04/26/2016 01:52 PM
Subject: Re: FTP problem
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Rob

Many thanks

On my target V5R2 system, port 21 is not open and doesn't display on
netstat

Remote Remote Local
Opt Address Port Port Idle Time State
* * telnet 000:00:45 Listen
* * smtp 037:26:31 Listen
* * www-http 000:04:09 Listen
* * netbios > 105:08:32 Listen
* * netbios > 000:00:09 *UDP
* * netbios > 000:03:13 *UDP
* * netbios > 049:32:27 Listen
* * ldap 040:51:05 Listen
* * cifs 000:04:58 Listen
* * drda 007:19:27 Listen
* * ddm 105:09:13 Listen
* * ddm-ssl 105:09:13 Listen

I checked whether there were any port restrictions enabled and there were
none.

What causes port 21 to appear in the list?

Rob


On 26 April 2016 at 15:57, Rob Berendt <rob@xxxxxxxxx> wrote:

To verify that FTP is started and stays running you can do the following
NETSTAT *CNN
F14=Display port numbers
Look for local port 21.
See also
F15=Subset
F13=Sort by column

If you use
5=Display details
on port 21 you should see this
Local host name . . . . . . . . . . . . . . . :
Local internet address . . . . . . . . . . : *

Unless you figured out some way to 'bind specific' the ftp port to
another
interface on your IBM i. This could also be a problem.

See also
NETSTAT *IFC
to get a list of interfaces on your IBM i


Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From: "Jim Oberholtzer" <midrangel@xxxxxxxxxxxxxxxxx>
To: "'Midrange Systems Technical Discussion'"
<midrange-l@xxxxxxxxxxxx>
Date: 04/26/2016 10:49 AM
Subject: RE: FTP problem
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>



Either the FTP ports are blocked, or the FTP server on the target is not
started?

Try "STRTCPSVR *FTP"

TCP is getting through so it's not a router problem, however if starting
the
FTP server does not fix it, there might be a firewall issue somewhere.

--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Rob
Dixon
Sent: Tuesday, April 26, 2016 9:43 AM
To: Midrange Systems Technical Discussion
Subject: Re: FTP problem

Jim Many thanks.

If I telnet to the local address on the V5R2 server, I get through.
If I FTP to the same local address, I cannot connect and get the message

Connecting to remote host xxx.xxx.xxx.xxx using port 21.
Cannot connect to host xxx.xxx.xxx.xxx at address XXX.XXX.XXX.XXX. Try
again later.

Could the port be the problem?

Rob

On 26 April 2016 at 15:00, Jim Oberholtzer <midrangel@xxxxxxxxxxxxxxxxx>
wrote:

Possibly but I'd like the test with TELNET or FTP to the specific
address (do not use the host name) to discover how that reacts.

So TELNET xxx.xxx.xxx.xxx and see how that reacts. You might try FTP
too.
If they work the problem is most likely a simple one in the host table
and/or Relational Database Directory Entry. If they do not work it's
likely the router/firewall is the issue.

--
Jim Oberholtzer
Agile Technology Architects


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of
Rob Dixon
Sent: Tuesday, April 26, 2016 8:28 AM
To: Midrange Systems Technical Discussion
Subject: Re: FTP problem

Jim,

Many thanks.

As I said, I can ping the internal adress. Could it be a port problem
blocked by the router?

Rob

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On 26 April 2016 at 14:14, Jim Oberholtzer
<midrangel@xxxxxxxxxxxxxxxxx>
wrote:

Another thing to consider. Ping uses UDP not TCP. If there was a
router/firewall change, is it blocking or not routing the TCP and
allowing the UDP through?

For grins try TELNET (or FTP for that matter) to the specific
address, not to the host name. If that works it's not the
router/firewall.

--
Jim Oberholtzer
Agile Technology Architects

-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf
Of Glenn Gundermann
Sent: Tuesday, April 26, 2016 8:11 AM
To: Midrange Systems Technical Discussion
Subject: Re: FTP problem

I wish I knew more in this area but here goes ...

The Change TCP/IP Domain (CHGTCPDMN) shows the IP address of your
domain name server.
Is this still correct?
If it is correct and you can reach the domain name server, does the
domain name server know about 'myhostname'?


Yours truly,

Glenn Gundermann
Email: glenn.gundermann@xxxxxxxxx
Work: (416) 675-9200 ext. 89224
Cell: (416) 317-3144


On 26 April 2016 at 09:05, Rob Dixon <robertsdixon@xxxxxxxxx> wrote:

I recently had to change a router and this has caused a variety of
problems.

I changed the RDB entries on a V5R1 server to reflect a new
internal IP address for a V5R2 server on the same network, but
when I execute the command STRTCPFTP on the V5R1 server and enter
the RDB name for the V5R2 server, I get

TCP101A - cannot find 'myhostname'.

Yet I can ping the internal address stored in the RDB definition
for the
V5R2 server without problem, both from Windows and using the ping
command on the V5R1 machine.

I wonder (ignorantly!) if the problem is with the router
configuration (which I didn't set up).

All help gratefully received.

many thanks

Rob Dixon








--
Rob Dixon

www.erros.co.uk
www.boarstall.com

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