Question

We have an application which add some rules to firewall. We need to retrieve the rules of firewall so that we can check whether the rule exists in the firewall. I am using C#.

Answer 1

Search the Firewall rules using a rule Name and remove it:

public static void RemoveFirewallRules(string RuleName)
{
    try
    {
        Type tNetFwPolicy2 = Type.GetTypeFromProgID("HNetCfg.FwPolicy2");
        INetFwPolicy2 fwPolicy2 = (INetFwPolicy2)Activator.CreateInstance(tNetFwPolicy2);
        var currentProfiles = fwPolicy2.CurrentProfileTypes;               

        // List of rules
        // List<INetFwRule> RuleList = new List<INetFwRule>();

        foreach (INetFwRule rule in fwPolicy2.Rules)
        {
            // Add a rule to list
            // RuleList.Add(rule);
            // Console.WriteLine(rule.Name);
            if (rule.Name.IndexOf(RuleName) != -1)
            {
                // Remove a rule
                INetFwPolicy2 firewallPolicy = (INetFwPolicy2)Activator.CreateInstance(Type.GetTypeFromProgID("HNetCfg.FwPolicy2"));                     
                firewallPolicy.Rules.Remove(rule.Name);
                Console.WriteLine(rule.Name + " has been deleted from the Firewall Policy");
            }
        }
    }
    catch (Exception r)
    {
        Console.WriteLine("Error deleting a Firewall rule");
    }
}

Answer 2

如果你打算补充提及提供INetFwPolicy2接口的组件,那么你可以使用C#中的动态类别

Type tNetFwPolicy2 = Type.GetTypeFromProgID("HNetCfg.FwPolicy2");
dynamic fwPolicy2 = Activator.CreateInstance(tNetFwPolicy2) as dynamic;                          
IEnumerable Rules = fwPolicy2.Rules as IEnumerable;
foreach (dynamic rule in Rules)
  {
  if (rule.Name=="My firewall rule")
    {

    }                              
  }

请注意,以这种方式使用动态物体需要提及微软。 CSharp集结。

Answer 3

你们可以从这一法典中得到一个想法。

INetFwPolicy2 fwPolicy2 = (INetFwPolicy2)Activator.CreateInstance(typeFWPolicy2);

List<INetFwRule> RuleList = new List<INetFwRule>();

foreach (INetFwRule rule in fwPolicy2.Rules)
{
  RuleList.Add(rule);
}

Answer 4

EDITED: INetFwPolicy2 is a .Net interface to manage Firewall rules msdn INetFwPolicy2 has a rules collection contains all ruls of this policy. You can query the Rules collection with Lambda, as follow:

INetFwPolicy2 fwPolicy = (INetFwPolicy2)Activator.CreateInstance(Type.GetTypeFromProgID("HNetCfg.FwPolicy2"));
fwPolicy2.Rules.OfType<INetFwRule>.Select....

以及所有其他Lambda的延伸。

友情链接