diff --git a/ipbc-Client/ipbc-Client.xcodeproj/project.pbxproj b/ipbc-Client/ipbc-Client.xcodeproj/project.pbxproj
index 5ffc7c4..2acc9ce 100644
--- a/ipbc-Client/ipbc-Client.xcodeproj/project.pbxproj
+++ b/ipbc-Client/ipbc-Client.xcodeproj/project.pbxproj
@@ -18,6 +18,8 @@
 		ECE5813B181A77090066D073 /* Cocoa.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = ECE5811A181A77090066D073 /* Cocoa.framework */; };
 		ECE58143181A77090066D073 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = ECE58141181A77090066D073 /* InfoPlist.strings */; };
 		ECE58145181A77090066D073 /* ipbc_ClientTests.m in Sources */ = {isa = PBXBuildFile; fileRef = ECE58144181A77090066D073 /* ipbc_ClientTests.m */; };
+		ECE6FED6181E8AFE004F6C1F /* WebserviceClient.m in Sources */ = {isa = PBXBuildFile; fileRef = ECE6FED5181E8AFD004F6C1F /* WebserviceClient.m */; };
+		ECE6FEDA181E8BE4004F6C1F /* WebServiceConstants.m in Sources */ = {isa = PBXBuildFile; fileRef = ECE6FED9181E8BE4004F6C1F /* WebServiceConstants.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -50,6 +52,10 @@
 		ECE58140181A77090066D073 /* ipbc-ClientTests-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "ipbc-ClientTests-Info.plist"; sourceTree = "<group>"; };
 		ECE58142181A77090066D073 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		ECE58144181A77090066D073 /* ipbc_ClientTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ipbc_ClientTests.m; sourceTree = "<group>"; };
+		ECE6FED4181E8AFD004F6C1F /* WebserviceClient.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebserviceClient.h; sourceTree = "<group>"; };
+		ECE6FED5181E8AFD004F6C1F /* WebserviceClient.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WebserviceClient.m; sourceTree = "<group>"; };
+		ECE6FED8181E8BE4004F6C1F /* WebServiceConstants.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WebServiceConstants.h; sourceTree = "<group>"; };
+		ECE6FED9181E8BE4004F6C1F /* WebServiceConstants.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = WebServiceConstants.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -115,6 +121,7 @@
 		ECE58120181A77090066D073 /* ipbc-Client */ = {
 			isa = PBXGroup;
 			children = (
+				ECE6FED7181E8B1C004F6C1F /* WebService */,
 				ECE5812C181A77090066D073 /* ipbcAppDelegate.h */,
 				ECE5812D181A77090066D073 /* ipbcAppDelegate.m */,
 				ECE5812F181A77090066D073 /* MainMenu.xib */,
@@ -154,6 +161,17 @@
 			name = "Supporting Files";
 			sourceTree = "<group>";
 		};
+		ECE6FED7181E8B1C004F6C1F /* WebService */ = {
+			isa = PBXGroup;
+			children = (
+				ECE6FED4181E8AFD004F6C1F /* WebserviceClient.h */,
+				ECE6FED5181E8AFD004F6C1F /* WebserviceClient.m */,
+				ECE6FED8181E8BE4004F6C1F /* WebServiceConstants.h */,
+				ECE6FED9181E8BE4004F6C1F /* WebServiceConstants.m */,
+			);
+			name = WebService;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -256,8 +274,10 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				ECE6FEDA181E8BE4004F6C1F /* WebServiceConstants.m in Sources */,
 				ECE5812E181A77090066D073 /* ipbcAppDelegate.m in Sources */,
 				ECE58127181A77090066D073 /* main.m in Sources */,
+				ECE6FED6181E8AFE004F6C1F /* WebserviceClient.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -470,6 +490,7 @@
 				ECE5814A181A77090066D073 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 		ECE5814B181A77090066D073 /* Build configuration list for PBXNativeTarget "ipbc-ClientTests" */ = {
 			isa = XCConfigurationList;
@@ -478,6 +499,7 @@
 				ECE5814D181A77090066D073 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/ipbc-Client/ipbc-Client.xcodeproj/project.xcworkspace/xcuserdata/gerrit.xcuserdatad/UserInterfaceState.xcuserstate b/ipbc-Client/ipbc-Client.xcodeproj/project.xcworkspace/xcuserdata/gerrit.xcuserdatad/UserInterfaceState.xcuserstate
index 8e64e6d..1f6d2aa 100644
Binary files a/ipbc-Client/ipbc-Client.xcodeproj/project.xcworkspace/xcuserdata/gerrit.xcuserdatad/UserInterfaceState.xcuserstate and b/ipbc-Client/ipbc-Client.xcodeproj/project.xcworkspace/xcuserdata/gerrit.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/ipbc-Client/ipbc-Client/Base.lproj/MainMenu.xib b/ipbc-Client/ipbc-Client/Base.lproj/MainMenu.xib
index 995c0d5..af9b8a8 100644
--- a/ipbc-Client/ipbc-Client/Base.lproj/MainMenu.xib
+++ b/ipbc-Client/ipbc-Client/Base.lproj/MainMenu.xib
@@ -721,7 +721,7 @@
                     <textField verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" setsMaxLayoutWidthAtFirstLayout="YES" translatesAutoresizingMaskIntoConstraints="NO" id="hXp-Wv-qfT">
                         <rect key="frame" x="131" y="49" width="332" height="147"/>
                         <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
-                        <textFieldCell key="cell" sendsActionOnEndEditing="YES" title="You need an ip-breadcrump.orc account to use this software." id="PYW-tK-cnY">
+                        <textFieldCell key="cell" sendsActionOnEndEditing="YES" title="You need an ip-breadcrump.org account to use this software." id="PYW-tK-cnY">
                             <font key="font" metaFont="system"/>
                             <color key="textColor" name="controlTextColor" catalog="System" colorSpace="catalog"/>
                             <color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
@@ -755,5 +755,6 @@ Gw
                 </subviews>
             </view>
         </window>
+        <customObject id="QYg-I7-rYj" customClass="WebserviceClient"/>
     </objects>
 </document>
\ No newline at end of file
diff --git a/ipbc-Client/ipbc-Client/WebServiceConstants.h b/ipbc-Client/ipbc-Client/WebServiceConstants.h
new file mode 100644
index 0000000..613a706
--- /dev/null
+++ b/ipbc-Client/ipbc-Client/WebServiceConstants.h
@@ -0,0 +1,16 @@
+//
+//  WebServiceConstants.h
+//  ipbc-Client
+//
+//  Created by Gerrit Linnemann on 28.10.13.
+//  Copyright (c) 2013 Adawim UG (haftungsbeschränkt). All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface WebServiceConstants : NSObject
+
+extern NSString * const WS_RESOURCE;
+extern NSString * const WS_GET_USERS_IP_SERVICE;
+
+@end
diff --git a/ipbc-Client/ipbc-Client/WebServiceConstants.m b/ipbc-Client/ipbc-Client/WebServiceConstants.m
new file mode 100644
index 0000000..c4c842c
--- /dev/null
+++ b/ipbc-Client/ipbc-Client/WebServiceConstants.m
@@ -0,0 +1,16 @@
+//
+//  WebServiceConstants.m
+//  ipbc-Client
+//
+//  Created by Gerrit Linnemann on 28.10.13.
+//  Copyright (c) 2013 Adawim UG (haftungsbeschränkt). All rights reserved.
+//
+
+#import "WebServiceConstants.h"
+
+@implementation WebServiceConstants
+
+NSString * const WS_RESOURCE = @"http://www.ip-bc.org/ws/update/ip";
+NSString * const WS_GET_USERS_IP_SERVICE = @"http://www.ip-bc.org/ws/info/ip";
+
+@end
diff --git a/ipbc-Client/ipbc-Client/WebserviceClient.h b/ipbc-Client/ipbc-Client/WebserviceClient.h
new file mode 100644
index 0000000..54200a8
--- /dev/null
+++ b/ipbc-Client/ipbc-Client/WebserviceClient.h
@@ -0,0 +1,19 @@
+//
+//  WebserviceClient.h
+//  ipbc-Client
+//
+//  Created by Gerrit Linnemann on 28.10.13.
+//  Copyright (c) 2013 Adawim UG (haftungsbeschränkt). All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface WebserviceClient : NSObject {
+    
+    NSTimer *updateTimer;
+    NSString *usersIPv4;
+}
+
+-(BOOL)updateDomain;
+
+@end
diff --git a/ipbc-Client/ipbc-Client/WebserviceClient.m b/ipbc-Client/ipbc-Client/WebserviceClient.m
new file mode 100644
index 0000000..95b883e
--- /dev/null
+++ b/ipbc-Client/ipbc-Client/WebserviceClient.m
@@ -0,0 +1,114 @@
+//
+//  WebserviceClient.m
+//  ipbc-Client
+//
+//  Created by Gerrit Linnemann on 28.10.13.
+//  Copyright (c) 2013 Adawim UG (haftungsbeschränkt). All rights reserved.
+//
+
+#import "WebserviceClient.h"
+#import "WebServiceConstants.h"
+
+@implementation WebserviceClient
+
+-(void)awakeFromNib {
+    updateTimer = [NSTimer scheduledTimerWithTimeInterval: 4
+                                             target: self
+                                           selector: @selector(tick:)
+                                           userInfo: nil
+                                            repeats: YES];
+}
+
+- (void)tick:(NSTimer *)theTimer {
+    [self updateDomain];
+}
+
+-(BOOL)updateDomain {
+    usersIPv4 = [self fetchIPv4];
+    NSString *storedIPv4 = [[NSUserDefaults standardUserDefaults] stringForKey:@"value.ip.ipv4"];
+    if(storedIPv4 == nil) {
+        [[NSUserDefaults standardUserDefaults] setObject:usersIPv4 forKey:@"value.ip.ipv4"];
+    }
+    
+    BOOL updateResult = NO;
+    
+    if([self checkUpdateNeeded]) {
+        NSLog(@"update resource: %@", WS_RESOURCE);
+        updateResult = [self doWebServiceUpdate];
+    } else {
+        NSLog(@"no update");
+    }
+    
+    return updateResult;
+}
+
+-(BOOL)checkUpdateNeeded {
+    NSString *storedIPv4 = [[NSUserDefaults standardUserDefaults] stringForKey:@"value.ip.ipv4"];
+    NSString *fetchedIPv4 = usersIPv4;
+    
+    if(storedIPv4 == nil) {
+        NSLog(@"stored IPv4 NULL");
+        return YES;
+    } else if(fetchedIPv4 == nil) {
+        NSLog(@"fetched IPv4 NULL");
+        return NO;
+    } else {
+        //NSLog(@"compare stored %@ with %@", storedIPv4, fetchedIPv4);
+        BOOL changed = [storedIPv4 isEqualToString:fetchedIPv4];
+        
+        if(changed) {
+            [[NSUserDefaults standardUserDefaults] setObject:fetchedIPv4 forKey:@"value.ip.ipv4"];
+        }
+        
+        return changed;
+    }
+}
+
+-(BOOL)doWebServiceUpdate {
+    NSString *settingTempName = [[NSUserDefaults standardUserDefaults] stringForKey:@"setting.name"];
+    NSString *settingTempToken = [[NSUserDefaults standardUserDefaults] stringForKey:@"setting.token"];
+    
+    NSURL *url = [NSURL URLWithString:WS_RESOURCE];
+    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
+    [request setHTTPMethod:@"POST"];
+    [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
+    
+    NSDictionary *tmp = [[NSDictionary alloc] initWithObjectsAndKeys:
+                         settingTempName, @"domain",
+                         settingTempToken, @"token",
+                         nil];
+    NSError *error;
+    NSData *postData = [NSJSONSerialization dataWithJSONObject:tmp options:0 error:&error];
+    [request setHTTPBody:postData];
+    
+    NSLog(@"update ip to %@", usersIPv4);
+    //NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];
+    NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
+    
+    NSString *strData = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
+    NSLog(@"data: %@", strData);
+    return YES;
+    
+    /*NSString *post = [NSString stringWithFormat:@"name=%@&token=%@", settingTempName, settingTempToken];
+    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
+    
+    NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];
+    
+    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
+    [request setURL:[NSURL URLWithString:WS_RESOURCE]];
+    [request setHTTPMethod:@"POST"];
+    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
+    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
+    [request setHTTPBody:postData];*/
+}
+
+-(NSString *)fetchIPv4 {
+    NSURL *myIpAdress = [NSURL URLWithString:WS_GET_USERS_IP_SERVICE];
+    NSString *contentOfURL = [NSString stringWithContentsOfURL:myIpAdress encoding:NSUTF8StringEncoding error:NULL];
+    NSString *contentTrimmed = [contentOfURL stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
+
+    //NSLog(@"fetched IPv4: %@", contentTrimmed);
+    return contentTrimmed;
+}
+
+@end