id summary reporter owner description type status milestone component version severity resolution keywords cc 2213 Problem with UDPOpen or UDPRecv an computer with more the one networc card skyteddy "Hello, the purpose of my program is to collect all sent replies within 15 second of all devices in my network, after my SSDP-Discover via UPnP. Every 3 seconds, I send it again. My program works on Windows XP, independent how many network cards are installed. In Windows 7 only, if only one network card is installed or active. This means, if all network cards are active, I get no UPnP-Responds. When I disable all network cards (vmware network adapter too!), except 1, my program works in Windows 7 too. the windows firewall is deactivated. no other security suite is installed. The SSDPdiscover_V1 works as just described above. I use for UDPRecv the same port, which was used for sending. In SSDPdiscover_V2 I've tried various UDPBinds to catch the incoming UPnP-packets, but nothing works :-( I've just noticed with dismay, on Windows XP I receive only answers from devices, they are connected on the first network card. I don't receive anything from the devices, they are connected on the second network cards. When I want to ""read"" this devices, I must disable the first network card in Device Manager. my friend told me, this must be a problem of the UDPOpen. In Java, there is the possibility to add the ip-address of the card, which should be used for the multicast. And I have to send the ssdp-request on each available network card and receive all the packets. Code the the attached file. But such a option is not available in UDPOpen. I don't know, where is the bug. I try to discuss this problem in your and in the German forum, but nobody answered: http://www.autoitscript.com/forum/topic/141027-problem-with-upnpssdp-discovery-on-windows-7-with-more-then-one-network-card/ http://www.autoit.de/index.php?page=Thread&threadID=31882 it is independent on which computer I try this program. XP, Win 7, x64 or x32. many thanks in advance R@iner" Bug closed AutoIt 3.3.8.1 None Rejected udpopen udprecv