Localhost IP Addresses Other Than 127.0.0.1

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Guest

We are developing an application in C# that runs on a PC and communicates
with a piece of equipment via the ethernet. For testing we have developed a
simulation of the equipment that we want to run on the same PC as the
application. We assigned the address 127.168.8.225 to the application and
127.168.8.129 to the simulation (both represent localhost). Under Windows
2000 this worked fine but when we upgraded to Windows XP it stopped working.
A possible clue is that on 2000 if I ping 127.168.8.225 the reply is from
127.168.8.225 but on XP the reply is from 127.0.0.1. Is this a change in XP
and does anyone know of a workaround.?
 
application. We assigned the address 127.168.8.225 to the application
and
127.168.8.129 to the simulation (both represent localhost). Under
Click to expand...

Assuming only one of them is listening on a socket, both the client and
server can use the same IP address. Try 127.0.0.1 for both?

Greetings,
Wessel
 
=?Utf-8?B?SmVmZiBTLg==?= said:
to Windows XP it stopped working. A possible clue is that on 2000 if
I ping 127.168.8.225 the reply is from 127.168.8.225 but on XP the
reply is from 127.0.0.1. Is this a change in XP and does anyone know
of a workaround.?
Click to expand...

Ping is not a reliable way to check what you seek.

Are you explicitly binding your server to an address? Also you should not use the 127.x block for
IP's, use 192.168.0.x or one of the other reserved LAN blocks.




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Hi,

IT should not be any problem really

I assume that you are binding each app to only one of the IPs ( You can usi
a IPEndPoint instance for this)

Do you know if you the service is listening? doing a telnet to that port?

what if you set different ports ? can you connect then?


cheers,
 
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