Acces denied error when I use firewall.dll propertry . (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

Question

I have code that use firewall.dll to add a rule to windows firewall but i get this exception"Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))" this is my code:

using NetFwTypeLib;
namespace Tserver
{
    class Program
    {
    static void Main(string[] args)
    {

        INetFwRule firewallRule = (INetFwRule)Activator.CreateInstance(
        Type.GetTypeFromProgID("HNetCfg.FWRule"));
                   firewallRule.Action = NET_FW_ACTION_.NET_FW_ACTION_BLOCK;
        firewallRule.Description = "Used to block all internet access.";
        firewallRule.Direction = NET_FW_RULE_DIRECTION_.NET_FW_RULE_DIR_OUT;
        firewallRule.Enabled = true;
        firewallRule.InterfaceTypes = "All";
        firewallRule.Name = "Block Internet";

        INetFwPolicy2 firewallPolicy = (INetFwPolicy2)Activator.CreateInstance(
            Type.GetTypeFromProgID("HNetCfg.FwPolicy2"));
        firewallPolicy.Rules.Add(firewallRule);
}

Does the current user of operation system have the admin rights? — Batu.Khan
You will need elevetated security level. Which will also imply UAC and so on. Btw it should think twice if you would REALLY chagne firewall settings by code — Boas Enkler

Left4Cookies Left4Cookies · Accepted Answer · 2014-11-24T08:46:06

You need to have admin rights to do what you're doing.

I've had the same problem a client machine, but as soon as I tried to do the same thing on a machine with administrator rights (Windows 7), everything worked perfectly.

Acces denied error when I use firewall.dll propertry . (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))

1 Answers