If the default limits are exceeded under heavy loads, the following error may be observed: "address in use: connect exception". By default under Vista when the values are not presend in the registry , the OS can allocate up to ephemeral ports above port , and the OS waits for seconds before reclaiming ports after an application closes the TCP connection. This is a considerable improvement over older Windows versions.
Recommended: leave at default, or use a number above up to decimal as necessary - maximum number of ports to use. Recommended: 30 decimal, denoting 30 seconds - time to wait before reclaiming ports, in seconds. Default time before reclaiming ports, if value is at 0xffffffff or not present in the registry is seconds.
Just reducing the delay is often sufficient without changing MaxUserPort, as it allows for reusing ports more efficiently. To query the current values, in command prompt, type: netsh int ipv4 show dynamicportrange tcp for UDP, use the same command, replacing only "tcp" with "udp" at the end. Notes: By default, dynamic ports are allocated between ports and for a total of ephemeral ports. Using netsh allows to set both the starting port and port range.
Editing the Registry allows for setting the port range, and the starting port is fixed at Deleting the MaxUserPort registry entry or setting it to a value outside the allowed range causes the OS to revert to using the default values. Some system processes can install port filters to block certain port ranges.
Each connection requires such control block, so this value determines how many active connections TCP can support simultaneously. Normally, TCP does not release a connection or reuse its resources until the connection has remained closed for a period of time specified by the value of the TcpTimedWaitDelay entry.
We recommend increasing it from the default if using network intensive applications that open many simultaneous connections, such as P2P. TCP stores control blocks in a hash table so it can find them very quickly.
If you adjust the number of TCBs the system creates as specified by the value of MaxFreeTcbs , you should also adjust the value of the hash table proportionally. Note this only has effect in the presence of running QoS applications that request priority traffic. Registry value is undocumented for the Vista version of Windows. To customize this setting, in the Windows Registry:. Recommended: 0 , possible values between 0 and - indicates the percentage value of reserved bandwidth for QoS applications.
Set to 0 to disable. In order to define DiffServ DSCP values, according to Microsoft the machine needs to have joined a domain, and interfaces have to see the domain controller. To overcome this limitation, so that you can tag DSCP values even for adapters that do not have access to a domain, use the following hidden registry key:.
Notes: gpedit. This registry key may also be needed in systems with multiple network adapters present. When this happens, you can usually see the following error in the Event Viewer System log:. Source: srv Event ID: Level: Error The server was unable to allocate from the system nonpaged pool because the server reached the configured limit for nonpaged pool allocations.
It is also possible to get an error indicating that: "Not enough server storage is available to process this command". To avoid those errors, you need to change the way Windows allocates memory for network services and file sharing. The below settings optimze the machine as a file server so it would allocate resources accordingly.
There are two related registry settings:. Note: Even though this tweak is from older Windows server OSes, it works on workstation versions, as well as Windows Vista and 7 32 and 64 bit. The tweak below allows for tweaking or disabling Nagle's alogrithm. Disabling "nagling" allows for very small packets to be transferred immediately without delay. The dafault state Nagling enabled improves performance by allowing several small packets to be combined together into a single, larger packet for more efficient transmission.
Keep in mind that disabling Nagle's algorithm may have some negative effect on file transfers, and can only help reduce delay in some games. Find the correct one with your IP address listed. Setting not present by default. For gaming performance, recommended is 1 disable.
For pure throughput and data streaming, you can experiment with values over 2. Wifi performance may see a slight improvement with disabled TcpAckFrequency as well. Note you can also set this to 1 to reduce the nagle effect from the default of ms without disabling it. The TCP Optimizer version 3. More detailed information about all available options is provided in the online documentation , answers to frequently asked questions are available in the Optimizer FAQ , and personalized help is available through our broadband tweaking forum.
It allows for tweaking all the above netsh settings and registry values in one simple step with the exception of the "gaming tweak" section. The patch also provides for easily reverting the settings to their Windows default values. Click Y when prompted to apply settings. Note: If for some reason Windows renames the file and adds. Windows Vista tcpip. Username: Password: forgot password?
Home » Articles » Registry Tweaks. I did not try the registry edits. I think I will leave those for now, unless I experience more problems with my internet speed. So far, it is much better than before tweaking the settings. Any other techniques or why is it like that? Try setting the Fragmentation Threshold to a lower value.
By default, for most WIFI cards it is set to Try setting it to bytes. Does Vista have the connection limitation like in XP?
IF so, can we use the same registry hack you wrote as below? Good read, Philip. The second paragraph in the article explains "elevated command prompt" - it simply means you need administrator priviledges to run those commands. I have noticed that some OEM installations of Vista have limitations on users, even when set as an administrator To get past this, you must re-install Vista.
Do not use the OEM installation since it likely contains the limitations - - instead, use a retail version or a site-licensed OEM version or use a service like FireDog.
Does it work with wireless broadband? I am sorry, but does anyone here speak english? I like to think I'm quite savvy, but even though I've altered all the CMD codes as mentioned, I still have no improvement. I strongly feel i simply do not have enough TCP connections available. On bittorrent I have hundreds of seeds available for 15 downloads, but in no way can I crank up my download speed above 50kb.
If I stop 10 out of 15 downloads, I have the same total speed, but much higher per download. I have an 8mb connection, so this is quite rediculous. Please, please, could someone lead me through this, step by step, in plain english, without leaving out obvious-to-some- steps? My income depends on my download speed, and I am losing it here. Man, I was just going through the same thing. I have tried a few things here and there.
I went through all of these websites finding new torrents to download, but never found any for performance. I found quite a few today that I have changed my parameters with and all that stuff, and they have worked out with an incredible increase in speed. I only using the best they have around me right now and that is 3m. However, it has been my own experience that Quickbooks can be particularly jumpy with this feature enabled. It goes by several different names depends on the vendor but you should only need to leave this on if you're using a gigabit interface on an Internet-facing server.
I use this "Compound TCP" when I can on the newer systems: fortunately, it has been backported to the based systems via hotfix At the "administrator" command prompt If you want to use IPv6, and your ISP doesn't have it, consider free and stable tunnel services from.
IPv6 privacy addressing for troubleshooting purposes; it can be disabled with the following command There is an additional tweak that can help deal with proper traffic routing: however, many routers don't implement it correctly, and Battlefield Heroes doesn't like it at all.
Use at your caution. To handle these cases, optional registry parameters can be created to modify the default behavior of some parts of the protocol drivers. Adjusting registry parameters without careful study may reduce your computer's performance.
This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, see How to back up and restore the registry in Windows.
The Name value in these keys provides the friendly name for a network connection that is used in the Network Connections folder. Values under these keys are specific to each adapter. Parameters that have a DHCP configured value and a statically configured value may or may not exist.
Their existence depends on whether the computer or the adapter is DHCP configured and whether static override values are specified. You must restart the computer for a change to take effect. You can use Registry Editor to modify them. Generally, these parameters do not exist in the registry. This is also known as the "2MSL" state.
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