www.BlackViper.com: Windows 7 Services 411 - DHCP Client

DHCP Client

Default Description:

Registers and updates IP addresses and DNS records for this computer. If this service is stopped, this computer will not receive dynamic IP addresses and DNS updates. If this service is disabled, any services that explicitly depend on it will fail to start.

Additional Information:

This service automatically receives a Dynamic IP address from your DHCP server and DNS updates. Required for ICS / internet client and if you run IPSEC, disable on a standalone system or one that has a static IP address. Take note: Most DSL/cable ISP's use DHCP to provide internet access. If you disable this service and your Internet connection no longer works, place this back into automatic. Most DSL and cable hardware routers have the option of enabling a DHCP server for the internal network. Ensure that the router is configured the same as your local PC's.

Additional Reading:

• DHCP: http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
• DNS: http://en.wikipedia.org/wiki/Domain_Name_System
• ICS: http://en.wikipedia.org/wiki/Internet_Connection_Sharing
• IPsec: http://en.wikipedia.org/wiki/IPsec
• VPN: http://en.wikipedia.org/wiki/Virtual_private_network

Discussion Topic Link:

Windows 7 Services Forum

Defaults Startup Type:

Windows 7 Starter: Automatic (Started)
Windows 7 Home Basic: Automatic (Started)
Windows 7 Home Premium: Automatic (Started)
Windows 7 Professional: Automatic (Started)
Windows 7 Ultimate: Automatic (Started)
Windows 7 Enterprise: Automatic (Started)

Other Settings:

Safe Setting: Automatic

Service Names:

Service Name (registry): Dhcp

Display Name: DHCP Client

Default Path and Command Line Options:

C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted

Log On As:

Account: Local Service

Dependencies:

What service DHCP Client needs to function properly:

• Ancilary Function Driver for Winsock (S, HB, HP, P, U, E)
• NetIO Legacy TDI Support Driver (S, HB, HP, P, U, E)
  • TCP/IP Protocol Driver (S, HB, HP, P, U, E)
• Network Store Interface Service (S, HB, HP, P, U, E)
  • NSI proxy service driver (S, HB, HP, P, U, E)

What other service require DHCP Client to function properly:

• WinHTTP Web Proxy Auto-Discovery Service (S, HB, HP, P, U, E)

Registry Settings (.reg):

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp]
"ServiceDll"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,\
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00
"DisplayName"="@%SystemRoot%\\system32\\dhcpcore.dll,-100"
"Group"="TDI"
"ImagePath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
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"Description"="@%SystemRoot%\\system32\\dhcpcore.dll,-101"
"ObjectName"="NT Authority\\LocalService"
"ErrorControl"=dword:00000001
"Start"=dword:00000002
"Type"=dword:00000020
"DependOnService"=hex(7):4e,00,53,00,49,00,00,00,54,00,64,00,78,00,00,00,41,00,\
66,00,64,00,00,00,00,00
"ServiceSidType"=dword:00000001
"RequiredPrivileges"=hex(7):53,00,65,00,43,00,68,00,61,00,6e,00,67,00,65,00,4e,\
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65,00,00,00,00,00
"FailureActions"=hex:80,51,01,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,\
00,01,00,00,00,c0,d4,01,00,01,00,00,00,e0,93,04,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Configurations]
"Options"=hex:32,00,00,00,00,00,00,00,04,00,00,00,00,00,00,00,ff,ff,ff,7f,00,\
00,00,00,01,00,00,00,00,00,00,00,04,00,00,00,00,00,00,00,ff,ff,ff,7f,00,00,\
00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Linkage]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Linkage\Disabled]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters]
"ServiceDll"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,\
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"ServiceDllUnloadOnStop"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\1]
"KeyType"=dword:00000007
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\15]
"KeyType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
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00,6e,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\220]
"KeyType"=dword:00000003
"RegSendLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,\
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00,73,00,74,00,00,00,00,00
"VendorType"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\3]
"KeyType"=dword:00000007
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\44]
"KeyType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\46]
"KeyType"=dword:00000004
"RegLocation"="SYSTEM\\CurrentControlSet\\Services\\NetBT\\Parameters\\DhcpNodeType"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\47]
"KeyType"=dword:00000001
"RegLocation"="SYSTEM\\CurrentControlSet\\Services\\NetBT\\Parameters\\DhcpScopeID"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\6]
"KeyType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parameters\Options\DhcpNetbiosOptions]
"KeyType"=dword:00000004
"OptionId"=dword:00000001
"VendorType"=dword:00000001
"RegLocation"=hex(7):53,00,59,00,53,00,54,00,45,00,4d,00,5c,00,43,00,75,00,72,\
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parametersv6]
"DllName"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parametersv6\Options]

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parametersv6\Options\23]
"KeyType"=dword:00000003
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[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Parametersv6\Options\24]
"KeyType"=dword:00000003
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54,00,63,00,70,00,69,00,70,00,36,00,5c,00,50,00,61,00,72,00,61,00,6d,00,65,\
00,74,00,65,00,72,00,73,00,5c,00,44,00,68,00,63,00,70,00,76,00,36,00,44,00,\
6f,00,6d,00,61,00,69,00,6e,00,53,00,65,00,61,00,72,00,63,00,68,00,4c,00,69,\
00,73,00,74,00,00,00,00,00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Dhcp\Security]
"Security"=hex:01,00,14,80,a4,00,00,00,b0,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,74,00,05,00,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,\
05,0b,00,00,00,00,00,18,00,fd,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,\
2c,02,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,20,\
02,00,00,00,00,14,00,9d,01,02,00,01,01,00,00,00,00,00,02,01,00,00,00,00,00,\
14,00,fd,01,02,00,01,01,00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,\
05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00