Re: re.TCP/IP problems

["Simon Coulter" <shc@xxxxxxxxxxxxxxxxx>]

Hello Christopher,

> When I ping the IP address I get the response
>           'reply from ... , bytes= , time<.. ,TTL'
> Is it Ok.

Well, assuming that the bytes= is not zero then you are able to make a 
connection from your PC to the 400.
PING does not verify that TCP is active on the 400, only that the interface 
(IOP) is active.  Did you check 
whether TCP is started and also whether the TELNET server is started on the 
400?  You may have a firewall in 
the way allowing PING but denying TELNET.

> Is there anyother better EMULATOR available for download ?
> 

Yes, the TN5250 application which comes free with OS/2 is pretty darn good.  
Does the TN5250 application give 
you any useful error messages or just the usual windoze crap -- "Error: It 
didn't work. OK?"  Those messages 
always remind me of the school counsellor in South Park, OK.

> What is the proxy server concept , can anyone please explain.
> 

A proxy server is an intermediate destination that provides a connection to the 
Internet.  It can provide 
limited firewall protection by redirecting ports but it is NOT a firewall.  A 
firewall may be a proxy server.  
A better approach is a SOCKS (SOCKets Secure) Server.  Proxies can be used by 
all TCP/IP stacks but SOCKS 
requires TCP clients that understand a SOCKS server.  Good implementations of 
TCP (such as the one that comes 
free with OS/2) provide SOCKS-aware clients.  I believe WinXX requires third 
party clients.

Regards,
Simon Coulter.

//----------------------------------------------------------
// FlyByNight Software         AS/400 Technical Specialists
// Phone: +61 3 9419 0175      Mobile: +61 0411 091 400
// Fax:   +61 3 9419 0175      E-mail: shc@flybynight.com.au
// 
// Windoze should not be open at Warp speed.
//--- forwarded letter -------------------------------------------------------
> MIME-Version: 1.0
> Date: Sat, 02 Jan 99 21:57:25 -0800
> From: "christopher sagayam" <christopher_70@hotmail.com>
> To: cgalgano@ediconsulting.com,
>     shc@flybynight.com.au,
>     dennis@lovelady.com,
>     jross@poboxes.com,
>     jteff19@IDT.NET,
>     kal@stix.com
> Subject: re.TCP/IP problems

> hello,
> 
> Thanks for responding .
> 
> My pc is not in the same network as that of the AS400 .
> 
> I am trying to connect through the internet .
> 
> The same Mochasoft 5250 worked perfectly when I used it in a PC 
> connected to the same network as that of the AS400.
> 
> When I ping the IP address I get the response
>           'reply from ... , bytes= , time<.. ,TTL'
> Is it Ok.
> 
> Is there anyother better EMULATOR available for download ?
> 
> What is the proxy server concept , can anyone please explain.
> 
> 
> Christopher.
> 
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail.com
> 

+---
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com
+---