Is Win7 blocking UDP traffic on 127.0.0.1?


  1. mariovde
    Posts : 7
    Win XP
       New #1

    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 win7.

    Anyone got an idea of what changed in Win7 regarding tcp/udp or socket changes?

    Thanks guys!

    Mario
      My Computer
    Quote Quote

  3. NoN
    Posts : 4,166
    Windows 7 Professional SP1 - x64 [Non-UEFI Boot]
       New #2

    mariovde said:
    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 win7.

    Anyone got an idea of what changed in Win7 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
    Last edited by NoN; 01 Mar 2012 at 18:44.
      My Computer
    Quote Quote

  4. mariovde
    Posts : 7
    Win XP
    Thread Starter
       New #3

    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 Computer
    Quote Quote

  6. NoN
    Posts : 4,166
    Windows 7 Professional SP1 - x64 [Non-UEFI Boot]
       New #4

    mariovde said:
    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 Computer
    Quote Quote

  7. mariovde
    Posts : 7
    Win XP
    Thread Starter
       New #5

    No, that didn't work either...
      My Computer
    Quote Quote

  8. zigzag3143
    Posts : 28,845
    Win 8 Release candidate 8400
       New #6

    mariovde said:
    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 win7.

    Anyone got an idea of what changed in Win7 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 Computer
    Quote Quote

 

  Related Discussions
Hi folks. I wasn't sure which forum this belonged in, so apologies if this is the wrong place. I'm working with a hardened Win7 x32 machine right now that's part of a domain that has a very strict (military) GPO set assigned to it. I have an application that sends unicast traffic on one machine,...
Blocking p2p traffic on network
in Network & Sharing

Hi Everyone and thank you for taking a look. I work on a road project in a rural area here in SL and we have very limited internet connectivity in my office of just 120gb package per month. but here other employees are using this to download torrents and they have already eaten up 70gb on...
Hi guys this issue is doing my head in. This happened to me before a few weeks ago, I reinstalled and after about a week the problem is back. The Issue: After a restart of the computer the firewall will NOT turn on, in the control panel it tells me to reset to default settings (1 Button) upon...
My desktop surprised me with a "Windows Not Genuine" message, and a black desktop background, this morning. To make a long story short, I'd purchased two Win7 Home Premium Upgrade keys in the summer of 2009, online from the Microsoft Store (in the USA). Microsoft had blocked the keys, and...
My ISP charges for outbound traffic, even though they dont pay for it. According to them it is to stop people sharing files and stuff illegally. In my case, it's accounting for 10% of my allowance, and I've tried everything I can to stop it. Somehow, people are getting into my network and...
Our Sites
Site Links
About Us
Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

 © Designer Media Ltd
All times are GMT -5. The time now is 22:22.
Find Us