Updating existing firewall rule using API

Question

I am able to pro grammatically add individual rules to the Windows Firewall (Server 2008 R2), however I am trying to avoid multiple rules per IP address, and would just like to

Answer 1

I have found this package it is available via nuget WindowsFirewallHelper

PM> install-package WindowsFirewallHelper

Example

var rule = FirewallManager.Instance.Rules.Where(o => 
    o.Direction == FirewallDirection.Inbound &&
    o.Name.Equals("Allow Remote Desktop")
).FirstOrDefault();

if (rule != null)
{
    //Update an existing Rule
    rule.RemoteAddresses = new IAddress[]
    {
        SingleIP.Parse("192.168.184.1"),
        SingleIP.Parse("192.168.184.2")
    };

    return;
}

//Create a new rule
rule = FirewallManager.Instance.CreateApplicationRule(
     FirewallManager.Instance.GetProfile().Type,
     @"Allow Remote Desktop",
     FirewallAction.Allow,
     null
);

rule.Direction = FirewallDirection.Inbound;
rule.LocalPorts = new ushort[] { 3389 };
rule.Action = FirewallAction.Allow;
rule.Protocol = FirewallProtocol.TCP;
rule.Scope = FirewallScope.All;
rule.Profiles = FirewallProfiles.Public | FirewallProfiles.Private;
rule.RemoteAddresses = new IAddress[] { SingleIP.Parse("192.168.184.1") };

FirewallManager.Instance.Rules.Add(rule);