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  3. January 2005

RE: RE: RE: Accessing AS400 Through Port Redirection

Rob,

In the case of Client Access 5250, no it's not just telnet.  There are other 
ports CA uses when you start a 5250 session.

Now I believe some of the other 5250 emulation products do use only port 
23-telnet, but don't hold me to that.

Charles Wilt
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
 

> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of rob@xxxxxxxxx
> Sent: Wednesday, January 19, 2005 10:15 AM
> To: Midrange Systems Technical Discussion
> Subject: Re: RE: RE: Accessing AS400 Through Port Redirection
> 
> 
> Isn't 5250 merely telnet, in this case?  Isn't that on the 
> standard port 
> 23?  Or does not Linksys support redirection of port 23?
> 
> Rob Berendt
> -- 
> Group Dekko Services, LLC
> Dept 01.073
> PO Box 2000
> Dock 108
> 6928N 400E
> Kendallville, IN 46755
> http://www.dekko.com
> 
> 
> 
> 
> 
> daparnin@xxxxxxxxxxxxxxxxxx 
> Sent by: midrange-l-bounces+rob=dekko.com@xxxxxxxxxxxx
> 01/19/2005 10:08 AM
> Please respond to
> Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
> 
> 
> To
> midrange-l@xxxxxxxxxxxx
> cc
> 
> Subject
> Re: RE: RE: Accessing AS400 Through Port Redirection
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> There seems to be some confusion as to how you are attempting 
> access (web
> browser, Client Access, etc).  I've got a Linksys router that 
> does FTP 
> port
> redirection to a PC-based ftp server.  The router recognizes the FTP
> request and automatically redirects to the designated 
> internal IP address.
> A 5250 session is not FTP or HTTP which typical come in on 
> standard ports
> so it won't redirect it.  That's why you need to specify a 
> port.  You can
> *open* a port to the AS/400 but you will have to specify it when you
> connect.
> 
> If you are trying to connect with a web browser and set up HTTP port
> redirection to the AS/400 I don't think that would work 
> because that would
> be more like using the AS/400 as a HTTP server which isn't 
> really what you
> want.
> 
> Dave Parnin
> Nishikawa Standard Company
> Topeka, IN  46571
> daparnin@xxxxxxxxxxxxxxxxxx
> 
> 
> 
> 
>   
>                       Vernon Hamberg  
>                       <vhamberg@xxxxxxxxxx        To:       Midrange 
> Systems Technical Discussion 
>                       t> <midrange-l@xxxxxxxxxxxx>@SMTP@CTB  
>                       Sent by:                    cc:       
> (bcc: David A 
> Parnin/Topeka/NISCO/SPCO) 
>                       midrange-l-bounces@m        Subject:  
> Re: RE: RE: 
> Accessing AS400 Through Port Redirection 
>                       idrange.com  
>   
>   
>                       01/19/2005 08:01 AM   
>                       Please respond to   
>                       Midrange Systems   
>                       Technical Discussion   
>                       <midrange-l@midrange   
>                       .com>  
>   
>   
> 
> 
> 
> It was not clear that you are specifying the external port 
> when you try to
> connect to this IP address from the outside. You must put    
> :4000   after
> the IP address, otherwise there is nothing to forward through 
> the router.
> 
> http://yourexternalip:4000
> 
> If you want to come in with Client Access, there is a whole 
> raft of ports
> you need to open up. The VPN suggestion is more secure. 
> LinkSys makes some
> nice VPN routers/appliances that can also do port redirection to some
> extent, if needed. You either need a client on the remote 
> computers or set
> up a VPN "dialup" connection in Windows.
> 
> HTH
> Vern
> 
> At 06:28 AM 1/19/2005, you wrote:
> >Hi Mike
> >
> >I already have the standard external ports, (80, 21, 23, 
> etc) mapped to
> >the relevant servers within the network and they work fine.  I have 
> always
> >been led to believe that mapping alternative ports to these ports on
> >different servers is fine but it requires the external port to be
> >specified (which I don't mind doing).
> >
> >I started looking at the redirection to port 80, purely 
> because I thought
> >it would be the easiest to test - a different web page to that of my
> >normal web server - figuring that if I could access a web page on the
> >AS/400 then it should be fairly straight forward to access 
> an interactive
> >session with Client Access or Mocha TN5250 as the emulator.
> >
> >I will double check the default route when I get back home on Friday.
> >
> >Thanks
> >
> >Jonathan
> >
> >
> >
> >-----Original message-----
> >From: "Mike Silvers" MSilvers@xxxxxxxxxxx
> >Date: Wed, 19 Jan 2005 12:17:50 +0000
> >To: "Midrange Systems Technical Discussion" midrange-l@xxxxxxxxxxxx
> >Subject: RE: RE: Accessing AS400 Through Port Redirection
> >
> > > Ok -- two things -- first -- a web page is not required 
> to sign on to
> > > the 400.  Second, from what you described, the external 
> traffic going
> to
> > > the web server originates from port 4000 in the external 
> world.  If 
> you
> > > would like the web page to be displayed to the outside world, the
> > > external port should be port 80.  So -- there should be 
> no redirection
> > > going on.  The router should be set to allow port 80 to 
> pass thru to
> > > 192.168.0.100.
> > >
> > > If you would like to have remote access, I would 
> recommend one of two
> > > ways.  The first is Client Access with SSL encryption.  
> The second way
> > > would be a VPN to your network and sign on using either 
> Client Access
> > > (no SSL) or Rumba.
> > >
> > > Mike
> > >
> > > -----Original Message-----
> > > From: midrange-l-bounces@xxxxxxxxxxxx
> > > [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of 
> Jonathan Mason
> > > Sent: Wednesday, January 19, 2005 7:05 AM
> > > To: Midrange Systems Technical Discussion
> > > Subject: Re: RE: Accessing AS400 Through Port Redirection
> > >
> > > Hi Mike,
> > >
> > > No, I use my registered domain address which gets the 
> request to the
> > > router.  The AS400 is on a private address, 192.168.0.100, and the
> > > router redirects port 4000 to 192.168.0.100:80
> > >
> > > Ultimately I want to be able to sign on to the AS400 over 
> the internet
> > > when I'm working away from home - which happens a lot these days.
> > >
> > > All the best
> > >
> > > Jonathan
> > >
> > > -----Original message-----
> > > From: "Mike Silvers" MSilvers@xxxxxxxxxxx
> > > Date: Wed, 19 Jan 2005 11:40:13 +0000
> > > To: "Midrange Systems Technical Discussion" 
> midrange-l@xxxxxxxxxxxx
> > > Subject: RE: Accessing AS400 Through Port Redirection
> > >
> > > > When you are trying to access the web page from the 
> external world,
> > > are
> > > > you using the url: http://ipaddress:4000/ ?
> > > >
> > > > -----Original Message-----
> > > > From: midrange-l-bounces@xxxxxxxxxxxx
> > > > [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of 
> Jonathan Mason
> > > > Sent: Wednesday, January 19, 2005 6:06 AM
> > > > To: Midrange-L
> > > > Subject: Accessing AS400 Through Port Redirection
> > > >
> > > > I have a model 150 running v4r5 at home which is 
> connected to my 
> home
> > > > network.  I also have a cable broadband connection to 
> my network 
> with
> > > a
> > > > static IP address and a Draytek Vigor 2104p router 
> peforming NAT and
> > > > Port Redirection.
> > > >
> > > > I want to be able to access the AS/400 over the 
> internet, and have
> set
> > > > up Port Redirection to map a specific port to the AS/400 (for 
> example
> > > > Port 4000 being redirected to the AS/400's port 80).  
> However, when 
> I
> > > > try to connect from outside of the network I get no 
> response from 
> the
> > > > AS/400.  Looking at the router, I can see that the Port 
> Redirection
> > > has
> > > > generated the correct address and port, but the AS/400 
> doesn't pick
> it
> > > > up.
> > > >
> > > > Is there anything that needs to be configured on the 
> AS/400 that I
> may
> > > > have missed?  I can see web pages from within the 
> network, but not
> > > from
> > > > the outside.
> > > >
> > > > Any suggestions would be most appreciated.
> > > >
> > > > Thanks
> > > >
> > > > Jonathan
> > > >
> > > >
> > > > Jonathan Mason
> > > > www.astradyne-uk.com
> > > >
> > > > --
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> > > >
> > > >
> > > >
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> > >
> > >
> > > Jonathan Mason
> > > www.astradyne-uk.com
> > >
> > > --
> > > This is the Midrange Systems Technical Discussion 
> (MIDRANGE-L) mailing
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> > >
> > >
> > >
> > > --
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> (MIDRANGE-L) mailing
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> >
> >
> >Jonathan Mason
> >www.astradyne-uk.com
> >
> >--
> >This is the Midrange Systems Technical Discussion 
> (MIDRANGE-L) mailing
> list
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