TCP/IP Has Reached the Security Limit Imposed on the Number of Concurrent TCP Connect Attempts Error on Windows Vista
In Windows Vista Event Viewer, there may be occasional occurrence of Event ID 4226 error which read like this error message: EventID 4226: TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts. The error happens because Windows Vista still limit the concurrent half-open or incomplete (syn packets) TCP/IP connections attempts that able to establish per second.
The security measure was first introduced in Windows XP Service Pack 2 (SP2) to limit the damage and protect the computer from being used by malicious and dangerous programs such as virus and worms to scan the Internet to infect more systems, or become a Bot that connects to IRC and subsequently accepts commands to launch Distributed Denial Of Service Attacks (DDoS) against other web servers or services.
Thus with these concurrect TCP connections limit in place, a lot of programs and applications which launch and trigger lots of outbound and inbound connections at short span of time will hit the limit and cause the error, and in worst cause, cause the connection to be dropped and download or upload speed become slow. The case is especially true in P2P (peer-to-peer) software such as BitComet, µTorrent, BitTorrent, Azureus, BitSpirit, eMule (eDonkey network), BearShare, Direct Connect, DC++, ApexDC++, ABC. The limit may also affect streaming P2PTV such as PPStream, PPLive, TVants, TVKoo!, Sopcast, and etc.
So in order to download faster, stream faster or speed up web browsing, one possible solution worth trying is by disabling this maximum concurrent half open TCP/IP connection limit.
To crack the TCP limit, the tcpip.sys for Windows Vista has been patched. You can download the patched tcpip.sys or the AutoPatch (Windows Vista Event ID 4226 Auto Patcher) to turn off Vista TCP connection limit here, or you can use a simpler GUI based tcpip.sys auto patcher. For Vista SP1 RC or newer version, check out the driver crack instead. Instruction guide available too. With limit removed, the event ID 4226 won’t appear again too.
Share and contribute or get technical support and help at My Digital Life Forums.
Related Articles
- Windows XP SP2 TCP Connection Limit (Event ID 4226)
- VistaTcpPatch Windows Vista TCP Half Open Limit Auto Patcher GUI Version
- Tweak (Increase or Change) Maximum Simultaneous HTTP and Downloads Connections to Web Server
- Windows Vista tcpip.sys Connection Limit Patch for Event ID 4226
- CrackTcpip.sys Driver for Vista SP1 v.668 to Patch tcpip.sys 6.0.6001.17052
- TCPIP.SYS Driver Patcher CrackTcpip.sys for Vista SP1 v.744 and 6001.18000 (RTM)
- Workaround to Run eMule in Windows Vista
- Download Vista tcpip.sys and UAC Auto Patcher to Increase TCP Connection Limit
- Limit Maximum TCP Connections to Web Servers
- Optimize and Increase BitTorrent (BT) Download Speed in Vista
Entries (RSS)
July 25th, 2007 23:20
i’ve update my vista
the tcpip.sys file version is 6.0.6000.20583
do you have cracked file for it?
thk u very much!
expecting your reply!
my mail:chinaadams2002@hotmail.com
September 1st, 2007 23:33
[...] concurrent connections to peers, causing Event Viewer system log to show plenty of “TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts” with Event ID 4226. It will also help to make the increasing popular P2PTV such as TVants, [...]
May 18th, 2008 01:35
[...] Event ID 4226 in Event Viewer that describes TCP/IP has reached the security limit imposed on the number of concurrent TCP connect attempts (more info). [...]