Using the internet services I hit my 5 Gb limit on traffic on my broadband connection due to UDP packets size Applies To: Windows | Windows 7 | Networking, Mail, and Getting Online Basic Information Hardware & Software: [Out => In] Modem 3G Huawei USB modem model E160 pluget into a 3G Mobile Broadband Router Dovada flashed with latest firmware. Wired connection RJ45: PC Dell 8100 XPS running Windows 7 home edition (Dell Purchase) Wired connection RJ45: Asus wl500gp flashed with openwrt backfire 10.x? running as printserver and FTP server. Wireless connections: Dell m65 new Windows 7 Professional (Microsoft Product Purchase) Wireless connections: Zotac ITX custom build passive cooled and SSD upgraded XP Windows 7 Ultimate (Microsoft Product Purchase) Wireless connections: IPhone 3G (iOS 4.x? latest) Wireless connection: PS3 (3.6) Danish ISP Øister with a 5 Gb data traffic limit monthly broadband simcard. Danish ISP Øister with a 1 Gb data traffic limit monthly phone&broadband simcard. Issue / Problem When using the internet services I hit my 5 Gb limit on traffic on my broadband connection. I have investigated and the main consumption problem is UDP packets related, that are sent in sizes of 17 to 25 bytes. Thus trigger extra overhead on all the small sent packets. What I neeed Simple way to stop sending small outgoing udp packets, and cluster chain them together to a desirable size. The solution must also be adjustable so that it can be tweaked not to inhibit Skype, and other delay sensitive programs. In essence outgoing packet size controlled nagling on udp. How I tried to find a solution Intalled wireshark to find out what was going on. Open regedit made a backup. Searched for keys containing UDP TCP SO_SNDBUF TCP_NODELAY SO_SNDLOWAT…. Really used to many hours of browsing time going over the following parts of the registry. HKEY_LOCAL_MACHINE\SYSTEM\ Action overview browsing HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet Action intense browsing and googled different keys and DWORD’s Searched and found that the TCP_NODELAY accord to some WOW gamming sites should be located in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSDTC\Parameters When using window 7. BASIC revelation most keys are not written in the registry! Aha.. Installed regmon and tried to isolate the registry keys that are triggered. Most common entry in regkey queries output “not found” using default…. Status Stuck! What I hope is the solution is a DWORD that sets a minimum packet size on send. Since there is a maximum size setting in Windows Server 2003. Dword MaximumUdpPacketSize http://technet.microsoft.com/en-us/library/cc783893(WS.10).aspx

DNS queries use UDP and tend to be short. I don't think that blocking small UDP packets is what you really want (at least not for packets going to port 53 on the other side). I'm normally also limited to 5 GB per month for mobile broadband (after the 5 GB the bandwidth is limited).