Additional or Changed TCP/IP Registry Parameters

• Afd.sys Registry Key
• IgnorePushBitOnReceives (changed in Windows NT 4.0 and Windows NT 3.51 Service Pack 5)
• ArpCacheLife (new in Windows NT 4.0 and Windows NT 3.51 Service Pack 4)
• ArpTRSingleRoute (new in Windows NT 4.0 and Windows NT 3.51 Service Pack 5)
• DefaultTTL for IP changed from 32 to 128 (changed in Windows NT 4.0)
• EnableSecurityFilters (new in Windows NT 4.0)
• MaxForwardBufferMemory (new in Windows NT 3.51 Service Pack 2)
• MaxForwardPending (new in Windows NT 3.51 Service Pack 2)
• MaxNumForwardPackets (new in Windows NT 3.51 Service Pack 2)
• MaxUserPort (new in Windows NT 4.0 and Windows NT 3.51 Service
  Pack 5)
• PersistentRoutes (The primary route metric is added as the fourth parameter in the PersistentRoutes key; new in Windows NT 3.51 Service Pack 2)
• RawIpAllowedProtocols (new in Windows NT 4.0)
• TcpAllowedPorts (new in Windows NT 4.0)
• TcpTimedWaitDelay (new in Windows NT 4.0 and Windows NT 3.51 Service Pack 5)
• UdpAllowedPorts (new in Windows NT 4.0)