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BIOT The TCP/IP stack for Windows XP SP2 and Windows Server 2003 SP1/SP2 limits the number of simultaneous incomplete outbound TCP connection attempts. If the number of attempts reaches the limit, subsequent TCP connection attempts are placed in a queue and handled at a fixed rate.

Although the TCP/IP stack limits the speed at which malicious programs, such as worms, can spread, it can hinder the performance of network intensive applications, such as peer-to-peer file sharing programs and vulnerability scanners. Applications that attempt a multitude of simultaneous incomplete outbound TCP connections degrade over time, and this problem becomes especially marked in the performance of vulnerability scanners.

Bypassing Incomplete Outbound TCP Connection Limit (BIOT) is utility software for Windows XP SP2 and Windows Server 2003 SP1/SP2 which bypasses the incomplete outbound TCP connection limit. BIOT overwrites the TCP/IP connection limit in kernel memory, leaving the system file unmodified.

NOTE: This tool does not support the x64 platform.

Supported TCPIP.SYS Versions

Windows XP [32-bit]
SP25.1.2600.2180 (xpsp_sp2_rtm.040803-2158)
SP2 with MS05-019 GDR5.1.2600.2685 (xpsp_sp2_gdr.050525-1028)
SP2 with MS05-019 QFE5.1.2600.2685 (xpsp.050525-1029)
SP2 with MS06-007 GDR5.1.2600.2827 (xpsp_sp2_gdr.060112-1653)
SP2 with MS06-007 QFE5.1.2600.2827 (xpsp.060112-2213)
SP2 with MS06-032 GDR5.1.2600.2892 (xpsp_sp2_gdr.060420-0254)
SP2 with MS06-032 QFE5.1.2600.2892 (xpsp.060420-0256)
SP2 with MS08-001 GDR5.1.2600.3244 (xpsp_sp2_gdr.071030-1259)
SP2 with MS08-001 QFE5.1.2600.3244 (xpsp_sp2_qfe.071030-1255)

Windows Server 2003 [32-bit]
SP15.2.3790.1830 (srv03_sp1_rtm.050324-1447)
SP1 with MS06-007 GDR5.2.3790.2617 (srv03_sp1_gdr.060112-1537)
SP1 with MS06-007 QFE5.2.3790.2617 (srv03_sp1_qfe.060112-1555)
SP1 with MS05-032 GDR5.2.3790.2709 (srv03_sp1_gdr.060523-1514)
SP1 with MS05-032 QFE5.2.3790.2709 (srv03_sp1_qfe.060523-1529)
SP1 with MS08-001 GDR5.2.3790.3036 (srv03_sp1_gdr.071030-1207)
SP1 with MS08-001 QFE5.2.3790.3036 (srv03_sp1_qfe.071030-1207)
SP25.2.3790.3959 (srv03_sp2_rtm.070216-1710)
SP2 with MS08-001 GDR5.2.3790.4179 (srv03_sp2_gdr.071030-1207)
SP2 with MS08-001 QFE5.2.3790.4179 (srv03_sp2_qfe.071030-1207)


[Download  v1.0.1]

Additional Information
01/08/2008: v1.0.1 UPDATE
Added support for MS08-001 version of TCPIP.SYS.