Windows firewall
| Windows firewall | |
|---|---|
| Basic data
|
|
| developer | Microsoft |
| operating system | Windows (from Windows XP SP2 or Windows Server 2003 SP1 ) |
| category | Personal firewall |
| License | Proprietary |
| German speaking | Yes |
| windows ... / ..- firewall- .. | |
The Windows firewall is a personal firewall from Microsoft that is part of Windows (from Windows XP SP2 ) and the Windows server operating systems (from Windows Server 2003 SP1 ).
functionality
The Windows Firewall drops - as in such applications usual - unsolicited incoming network connections and asks when you start other applications , the server - Services offer for users who on administrator - rights have, to see if inbound links to these applications open ports should be allowed. You can the Security Center - to the added also with Service Pack 2 central administrative agency for so-called personal firewalls and virus scanners - or (in Windows XP , under C:\Windows\Inf\) a file in INI format name NETFW.INF configured be. Exception lists for specific ports and applications can be created there in two profiles .
In addition to the option of displaying and changing the settings via the graphical user interface , there is also the command (from Windows XP or earlier) that can also be used to netshactivate the firewall (in the so-called "netsh firewall" context, ie [up to Windows XP] with the command extension firewallor [from Vista ] advfirewall) can be controlled via a command window .
history
The Windows NT4 and Windows 2000 operating systems already have on-board options for packet filtering that older Windows versions lack. On the one hand, IPsec is a possibility for rule-based packet filtering, on the other hand, filters for incoming connections to certain ports can be defined in the properties of the network connection.
The Internet Connection Firewall (ICF) is supplied with Windows XP up to and including Service Pack 1 . It can be activated for individual network interfaces and checks incoming data packets to see whether they have been requested beforehand. In the standard configuration, the ICF is not activated for all network interfaces. As a result, many Windows XP computers that were not patched in time fell victim to the Internet worms " Blaster " and " Sasser ".
With Service Pack 2 for Windows XP, additional security functions were added: The security center was introduced. The functionality of the firewall has been expanded and it has been renamed Windows Firewall . It is automatically activated when installing Service Pack 2 or when installing Windows from a data carrier with integrated (English: slipstreamed ) Service Pack 2. Initially, a programming error impaired the reliable function of the Windows firewall. This was eliminated shortly after the release of Service Pack 2 in a security update dated December 14, 2004. The Windows firewall does not control connections directed outwards under Windows XP. No port ranges can be specified for connections directed inwards.
In Windows Vista the function of the firewall has been extended again: It can filter outgoing connections. In addition, the IPsec guidelines, which were previously independent of the Windows firewall, have been integrated and it has remote maintenance access .
Web links
- Understanding Windows Firewall Settings ( Requires JavaScript ) - Microsoft Help
- Understanding Windows Firewall settings - Microsoft
- Windows Firewall (English) - Microsoft TechNet
Individual evidence
- ↑ Configuring Windows Firewall with Netsh - NT4Admins , 2016
- ↑ Netsh Commands for Windows Firewall with Advanced Security (English) - Microsoft TechNet , last change in June 2009.