landofcash/ip-address-filtering

Lightweight C# ASP.NET MVC IP address filtering library with roles

IP-Address-Filtering

Lightweight C# ASP.NET MVC address filtering library

The library allows validating IP address against:

• Single IP address
• List of multiple IP addresses
• Single IP address range
• Multiple IP address ranges
• Supports CIDR IP address range format as well as IP4 subnets
• Roles+IP list stored in updateable static class

How to use with the IP address hardcoded into attribute

	[IPAddressFilter("::1", IPAddressFilteringAction.Allow)]
	public ActionResult TestLocal()
	{
	    ViewBag.Message = "Local test page.";

	    return View();
	}
	[IPAddressFilter("192.168.0.100", IPAddressFilteringAction.Allow)]
	public ActionResult TestRemote()
	{
	    ViewBag.Message = "Remote test page.";

	    return View();
	}

Roles with IP list

First need to fill roles + IP list, do that on app start, use "0.0.0.0" to allow any IP

	var rolesWithIpList = new Dictionary<string, List<string>>()
	{
		{ "admin", new List<string>() {"192.168.10.100"}},
                { "user", new List<string>() {"192.168.10.200", "192.168.10.201", "192.168.10.202"}},
                { "simpleRange",new List<string>() { "8.8.8.7-8.8.8.9" } },
                { "netmask",new List<string>() { "192.168.80.1/255.255.255.0" } },
                { "prefix",new List<string>() { "192.168.9.1/24" } },
	};
	RolesContainer.UpdateRolesList(rolesWithIpList);

In controller mark methods with IPAddressRoleFilter attribute and specify roles that are allowed. Note that there are two predefined roles: "local" ("127.0.0.1", "::1") and "any" ("0.0.0.0")

	[IPAddressRoleFilter("admin,local")]
        public ActionResult About()
        {
            ViewBag.Message = "Your application description page.";

            return View();
        }

Also the role named "global" is added by default to all IPAddressRoleFilter attributes This role allows to enable/disable IPs for all IPAddressRoleFilter attributes.

	[IPAddressRoleFilter("admin,local")]
	// same as
	[IPAddressRoleFilter("global,admin,local")]