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On the Firewall vs In the Firewall

Both "on the firewall" and "in the firewall" can be correct depending on the context. "On the firewall" is commonly used when referring to something physically located on the surface of the firewall, while "in the firewall" is used when talking about something contained within the firewall.

Last updated: March 15, 2024 • 2359 views

On the Firewall

This phrase is correct and commonly used when referring to something physically located on the surface of the firewall.

Use "on the firewall" when describing something that is physically placed on the surface of the firewall, such as a sticker or a sensor.

Examples:

  • There is a warning sticker on the firewall.
  • The temperature sensor is mounted on the firewall.
  • This article describes how to turn on the firewall or turn off the firewall in Windows XP Service Pack 2 and Service Pack 3. You might want to disable the firewall if ...
  • A firewall is software or hardware that checks information coming from the Internet or a network, and then either blocks it or allows it to pass through to your  ...
  • Turning on the firewall will affect other programs that access this computer, such as file and print sharing, and remote desktop connections. Administrators ...
  • ... packet processing; that way, packets that are part of an existing connection based on the firewall's state table can be allowed through without further analysis .

Alternatives:

  • attached to the firewall
  • mounted on the firewall
  • located on the firewall
  • positioned on the firewall
  • situated on the firewall

In the Firewall

This phrase is correct and commonly used when referring to something contained within the firewall.

Use "in the firewall" when describing something that is inside the firewall, such as data packets or security rules.

Examples:

  • The firewall filters traffic in the firewall.
  • The rules are configured in the firewall.
  • Feb 12, 2015 ... If you run an unsigned app that is not listed in the firewall list, a dialog appears with options to Allow or Deny connections for the app.
  • ... of a network through a positive control model. This means that the only traffic allowed onto the network defined in the firewall policy is; all other traffic is denied.
  • Allowing a program to communicate through a firewall (sometimes called unblocking) is like punching a hole in the firewall. Each time you open a port or allow a ...
  • When the packet passes through the firewall, it filters the packet on a protocol/ port number basis (GSS). For example, if a rule in the firewall exists to block telnet ...

Alternatives:

  • within the firewall
  • inside the firewall
  • contained in the firewall
  • internally in the firewall
  • enclosed in the firewall

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