diff --git a/Core/Settings.cs b/Core/Settings.cs
index b5383d6..42757b5 100644
--- a/Core/Settings.cs
+++ b/Core/Settings.cs
@@ -67,9 +67,9 @@ namespace ScrewTurn.Wiki {
 			}
 		}
 
-        /// <summary>
-        /// Gets direction of the application
-        /// </summary>
+		/// <summary>
+		/// Gets direction of the application
+		/// </summary>
 		public static string Direction {
 			get {
 				if(Tools.IsRightToLeftCulture()) return "rtl";
@@ -605,6 +605,24 @@ namespace ScrewTurn.Wiki {
 			}
 		}
 
+		/// <summary>
+		/// Gets the main URL of the wiki, defaulting to the current request URL if none is configured manually.
+		/// </summary>
+		/// <returns>The URL of the wiki.</returns>
+		public static Uri GetMainUrl() {
+			Uri mainUrl = new Uri(MainUrl);
+			if(mainUrl.Host == "www.server.com") {
+				try {
+					// STW never uses internal URLs with slashes, so trimming to the last slash should work
+					// Example: http://server/wiki/namespace.page.ashx
+					string temp = HttpContext.Current.Request.Url.ToString();
+					mainUrl = new Uri(temp.Substring(0, temp.LastIndexOf("/") + 1));
+				}
+				catch { }
+			}
+			return mainUrl;
+		}
+
 		/// <summary>
 		/// Gets the correct path to use with Cookies.
 		/// </summary>
@@ -875,20 +893,17 @@ namespace ScrewTurn.Wiki {
 			}
 		}
 
-        /// <summary>
-        /// Gets or sets the IP/Host filter for page editing.
-        /// </summary>
-	    public static string IpHostFilter
-	    {
-	        get{
-	       
-	            return Provider.GetSetting("IpHostFilter");
-	        }
-            set
-            {
-                Provider.SetSetting("IpHostFilter", value);
-            }
-	    }
+		/// <summary>
+		/// Gets or sets the IP/Host filter for page editing.
+		/// </summary>
+		public static string IpHostFilter {
+			get {
+				return GetString(Provider.GetSetting("IpHostFilter"), "");
+			}
+			set {
+				Provider.SetSetting("IpHostFilter", value);
+			}
+		}
 
 		/// <summary>
 		/// Gets or sets the max number of recent changes to log.