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Windows 7: Is Win7 blocking UDP traffic on 127.0.0.1?


01 Mar 2012   #1

Win XP
 
 
Is Win7 blocking UDP traffic on 127.0.0.1?

Hi,

We are building an 2 application that connect to 127.0.0.1:30303.
They are used to send data from app A to app B, acting as a local p2p connection.

On windows XP, everything runs as it should. On windows 7 it doesn't work anymore.
We've tried turning off the firewalls, opening ports etc but we cannot get this connection to work on Windows 7.

Anyone got an idea of what changed in Windows 7 regarding tcp/udp or socket changes?

Thanks guys!

Mario

My System SpecsSystem Spec
.

01 Mar 2012   #2
NoN

Windows 7 Professional SP1 - x64
 
 

Quote   Quote: Originally Posted by mariovde View Post
Hi,

We are building an 2 application that connect to 127.0.0.1:30303.
They are used to send data from app A to app B, acting as a local p2p connection.

On windows XP, everything runs as it should. On windows 7 it doesn't work anymore.
We've tried turning off the firewalls, opening ports etc but we cannot get this connection to work on Windows 7.

Anyone got an idea of what changed in Windows 7 regarding tcp/udp or socket changes?

Thanks guys!

Mario
Welcome to SevenForums,

Maybe try to edit the hosts file in windows 7 with Notepad...

You can find a tip: Here
My System SpecsSystem Spec
01 Mar 2012   #3

Win XP
 
 

Thank you for the reply NoN, but we've look in the hosts file already.
it says 127.0.0.1 localhost.
So we think this is okay, because XP has the same hosts-file.
My System SpecsSystem Spec
.


01 Mar 2012   #4
NoN

Windows 7 Professional SP1 - x64
 
 

Quote   Quote: Originally Posted by mariovde View Post
Thank you for the reply NoN, but we've look in the hosts file already.
it says 127.0.0.1 localhost.
So we think this is okay, because XP has the same hosts-file.
Perhaps some infos that might help:
Hosts File : Use in Windows 7 / Vista[2]=Networking Internet
My System SpecsSystem Spec
02 Mar 2012   #5

Win XP
 
 

No, that didn't work either...
My System SpecsSystem Spec
02 Mar 2012   #6

Win 8 Release candidate 8400
 
 

Quote   Quote: Originally Posted by mariovde View Post
Hi,

We are building an 2 application that connect to 127.0.0.1:30303.
They are used to send data from app A to app B, acting as a local p2p connection.

On windows XP, everything runs as it should. On windows 7 it doesn't work anymore.
We've tried turning off the firewalls, opening ports etc but we cannot get this connection to work on Windows 7.

Anyone got an idea of what changed in Windows 7 regarding tcp/udp or socket changes?

Thanks guys!

Mario
Some firewalls can block the ports/prot. even when disabled. You may need to un-install it to find out.
My System SpecsSystem Spec
Reply

 Is Win7 blocking UDP traffic on 127.0.0.1?




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