[En-Nut-Discussion] TCP connection to fixe IP

[Gilles]

Bonjour Ole,

1) As I said in my previous Email, the code works correctly in a local
network BUT with respect of the IP range.
Example:
 
GOOD: device IP = 192.168.0.1     and   gateway IP = 192.168.0.254

NOT GOOD : device IP = 192.168.1.1     and   gateway IP = 192.168.0.254

In that case, the gateway IP is force to 0.0.0.0 by NutOS

How can I bypass the 0.0.0.0 change ?

2) I have redo some test between my ARM9 and a distant PC to be able to give
you more details about this type of connection. Actually, the error received
is : Time out
Firewall have check and seems correct.
No TCPIP message can be send out to an external IP

Best regards
Gilles

-----Original Message-----
From: Ole Reinhardt [mailto:ole.reinhardt at embedded-it.de] 
Sent: lundi 5 octobre 2009 09:55
To: gilles at palmcom.fr; Ethernut User Chat (English)
Subject: Re: [En-Nut-Discussion] TCP connection to fixe IP

Hi Gilles,

> I have developed a piece of code to establish a dialog between my ARM9
board
> and a PC in 2 different location.(2 different IP fix addresses)
> When the PC establish the TCP link ,  the ARM9 receive and respond to the
> TCP frame correctly.
> If I try to establish the TCP dialog starting from the ARM9, it fails on
the
> NutTcpConnect(sock1,dest_addr, PortSend)
> All is good if I stay inside my office network.

Are you sure there is neither a masquerading (NAT) nor any other kind of
firewall between the pc and your board? Have you correctly set your
gateways on both entities?

Have you checked the error code after the failed connect with
NutTcpError()? It might give you a hint what is going wrong.

Regards,

Ole Reinhardt

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