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Wed, Jun 29, 2016 10:18 pm

Modifying an existing Windows Firewall rule

You can determine if the Microsoft Windows Firewall is enabled from a command line interface (CLI) by opening a command prompt window and using the netsh command netsh advfirewall show currentprofile. If it is enabled, you will see the "state" value is set to "ON".

C:\Users\nell>netsh advfirewall show currentprofile

Public Profile Settings:
State                                 ON
Firewall Policy                       BlockInbound,AllowOutbound
LocalFirewallRules                    N/A (GPO-store only)
LocalConSecRules                      N/A (GPO-store only)
InboundUserNotification               Enable
RemoteManagement                      Disable
UnicastResponseToMulticast            Enable

LogAllowedConnections                 Disable
LogDroppedConnections                 Disable
FileName                              %systemroot%\system32\LogFiles\Firewall\pfirewall.log
MaxFileSize                           4096



If you want to check on whether inbound access is permitted through the firewall for a particular port or application, you can search for it with a netsh advfirewall firewall show rule name=all dir=in command. Since there will likely be many lines of output, you can filter the output for a particular port or application name by piping it to the find command. E.g., if I want to check on whether a rule is in place for an SSH server application, I can have find look for "SSH".

C:\Users\nell>netsh advfirewall firewall show rule name=all dir=in | find "SSH"
Rule Name:                            Bitvise SSH Server (TCP/IPv6 22)
Grouping:                             Bitvise SSH Server
Rule Name:                            Bitvise SSH Server (TCP/IPv4 22)
Grouping:                             Bitvise SSH Server


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[/os/windows/software/security/firewall] permanent link

Tue, Nov 18, 2014 10:51 pm

Checking and changing the Windows Firewall settings on a Windows system

The advfirewall command can be used from a command prompt to check and modify the settings for the Microsoft Windows Firewall software on a Windows Vista, 7, 8, or Server 2008 system.

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[/os/windows/software/security/firewall] permanent link

Thu, Dec 29, 2005 10:34 pm

Kerio Personal Firewall 2.1.5

I've been using Kerio Personal Firewall 2.1.5 from Kerio Technologies on a Windows 98 Second Edition (SE) system. I hadn't use the system for quite awhile. When I did so today, I checked on whether an update was available for the firewall software. I learned that the Kerio Personal Firewall software was acquired by Sunbelt Software. Sunbelt's rebranded version of the firewall doesn't run on Windows 98 according to Sunbelt's FAQ.
The Sunbelt Kerio Personal Firewall 4 requires 10 MB of disk space for installation and runs ONLY on desktop editions of Windows 2000 and XP. Kerio Personal Firewall 4 DOES NOT run on Windows 9x, Me, NT, 2000 Server and 2003 Server.
Sunbelt doesn't support nor offer for download the old 2.1.5 version, which was available for free from Kerio Technologies, but states in the FAQ that it can still be found at various sites on the Net for download by doing a Google search for "Kerio 2.1.5" and that technical support for the older version can still be obtained from the Kerio Forum at CastleCops.

[/os/windows/software/security/firewall] permanent link

Sat, Aug 13, 2005 9:39 pm

Norton Internet Security Network Access Problem

I've spent a few days trying to resolve a problem on a system where there was no web access, but I could ping IP addresses, except for the IP address of the system itself. I finally traced the problem to the Norton Internet Security 2002 firewall software running on the system.

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[/os/windows/software/security/firewall] permanent link

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