RE: Network connection-restatement (sorry)-server can't find client

Mike, Reeve, and Hak:

I don't think it's RT314.  Here's why:  When trying to get the distributed
debugger to work, I had to tell the network guy to open up a port (forget
which) on the firewall in front of the as/400.  It still didn't work, but he
said he could see that the outbound packets were being denied out but he
didn't know why.  I couldn't afford to spend anymore time on it so that's as
far we got.  But, it suggests an issue with the firewall in front of the
as/400.

I can do a STRCODE session with the IP address that is associated with my
RT314, and then prompt CL (the old way, not the gui way), RMVM, etc.

I can submit the compile, but like Reeve, get no feedback - except for the
red highlighted status bar at the bottom (like you get when GET FROM HOST)
but it flashes just for a second so I have no idea what the text was.

For the compile, is there a particular port that must be open on my router?
I think for the distributed debugger I needed 4200 and for something else
3001 open.  Is there a port or service that needs to be open on the firewall
in front of the as/400?

As for PC firewalls, I use both Norton Internet Security and Zone Alarm.
Why not be doubly safe?  I thought that perhaps I inadvertantly set up a
rule to deny the traffic but Reeve says he's not using a firewall product so
that's probably not it.

I think this is an important question because more and more people are
working from home (see the current issue of Selling eServer Solutions) but
if we spend too much time (and money) getting online or staying online then
we'll never reach distributed employment nirvana ;O-)

Phil

> -----Original Message-----
> From: code400-l-admin@midrange.com
> [mailto:code400-l-admin@midrange.com]On Behalf Of hockings@ca.ibm.com
> Sent: Friday, November 23, 2001 8:54 AM
> To: code400-l@midrange.com
> Subject: Re: Network connection-restatement (sorry)-server can't find
> client
>
>
> This is a multipart message in MIME format.
> --
> [ Picked text/plain from multipart/alternative ]
> Hi Reve,
>
> CODE _should_ work just peachy with your configuration.  As Hak indicates
> it is most likely just a configuration exercise :-).  Currently I'm
> connected to work (in the dining room) via VPN through a wireless access
> point to my local (house) LAN which is connect to the internet via cable
> through a LinkSys router (Similar to your NetGear I expect).  I can run
> WebFacing, edit files, whatever I've tried all works (which is simply
> marvellous on winter days when the drive to work is intolerable).
>
> I don't think that CODE/400 needs to "know" you IP address does it?  For
> me the current local address on the machine is 192.168.1.100 as supplied
> by the LinkSys DHCP server.  However, external to the LinkSys it is
> something entirely different, in your terminology 209.50.yadda.yadda.  I
> can see the real address by going to an external site that will return the
> IP address it sees like http://www.hockings.net/java-server/index.jsp.
>
> Now, if you are _NOT_ using something like VPN to connect then the
> firewall at the AS/400 end may be deflecting any attempt that you might
> make to connect and that may have to be configured appropriately.  I
> suspect that the port(s) that CODE uses to connect to the host are
> documented somewhere :-).  Should you be using the old STRCODE
> communications then I suspect that you will need to configure your NetGear
> to forward the specified port connection request to a designated machine.
>
> When you use a dial-up connection are your dialling in to an external ISP
> or  to your AS/400 (or some access point on the same intranet?
>
> Kind regards,
>
> Mike
>
> Mike Hockings, P.Eng.
> WebSphere Development Tools for AS/400  -  CODE/Designer & WebFacing !
> IBM Canada Ltd. Laboratory
> hockings@ca.ibm.com
> voice 905 413 3199
>
> Please respond to code400-l@midrange.com
> Sent by:        code400-l-admin@midrange.com
> To:     code400-l@midrange.com
> cc:
> Subject:        Re: Network connection-restatement (sorry)-server
> can't find client
>
>
> When the compile is done the host will execute a "calls back" to the
> client.  There are two possible reasons we can think of that might be
> causing this problem.
>
> 1.  One of the firewalls (either the RT314 or the one between the cable
>    modem and the 820) is not allowing the call back to pass through.
>               So you can check which port the "call back" is using and
> make
>    sure that the firewall allows the connection. You can probably get the
>    port  information from your firewall tools.
>
> 2.  The host code is not getting the correct address to do the call back
>    (and in fact is trying to connect to a different client.)  If you go to
>    a DOS window and run ipconfig then you will see all network addresses
>    that the Windows machine is using.  If there are multiple addresses
>    listed then the first one must be the address that should be passed to
>    the server for the "call back".  On Windows 2000, I think that you can
>    go to the Network Connections->Advance Settings to move your
> workstation
>    address up and down.
>
> You might want to check if the feed back works by STRCODE and then on
>    another OS400 session try the command:
>
>    CALL QCODE/EVFCFDBK PARM( '37' 'Y' 'OS400' '<LOCAL> CODEEDIT
>    "<OS400>lib/file(member)"' ).
>               Change QCODE to QDEVTOOLS if you are on V5R1 OS/400.
>
>
>    Hak Lui
>    AS/400 AD, IBM Canada Ltd.
>    e-mail: haklui@ca.ibm.com
>
>
> "Reeve Fritchman" <reeve@ltl400.com>@midrange.com on 11/21/2001 03:06:47
> PM
>
> Please respond to code400-l@midrange.com
>
> Sent by:  code400-l-admin@midrange.com
>
>
> To:   "CODE400-L@midrange. com" <CODE400-L@midrange.com>
> cc:
> Subject:  Network connection-restatement (sorry)-server can't find client
>
>
> I'm having trouble getting a CODE/400 server connection when working
> through
> my network connection.  I can't get the error list back when I submit a
> compile; everything else (LPEX, Verify, GUI prompting, etc.) works fine. I
> know I could Verify first, but basing on caching performance, it's faster
> to
> compile.
>
> I have two systems connected to a Netgear RT314 Gateway Router (no
> ROTFLYAO,
> please) and then into a cable modem up to the 820 via a firewall.  The
> RT314
> provides NAT and some firewall protection.  The IP address seen by the
> RT314
> is not fixed (today it's 65.34.yada.yada); within the LAN, the RT314 is
> 192.168.0.1 and the other systems are ".2" and ".3".
>
> When I use a dial-up connection (without the RT314), everything works fine
> (because CODE/400 knows my IP address).  I think this shows the server end
> is not causing the problem.
>
> I assume the RT314 is the issue.  The iBox is giving me EVF4000, "A remote
> host refused an attempted connect operation."  (3425).
>
> I'd be grateful for any help...
>
> Thanks,
> Reeve
>
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