diff --git a/ui-ngx/src/app/modules/home/components/device/device-credentials.component.ts b/ui-ngx/src/app/modules/home/components/device/device-credentials.component.ts
index c051af11eb..fb4e81653e 100644
--- a/ui-ngx/src/app/modules/home/components/device/device-credentials.component.ts
+++ b/ui-ngx/src/app/modules/home/components/device/device-credentials.component.ts
@@ -41,7 +41,7 @@ import {
   DeviceCredentialsDialogLwm2mData,
   END_POINT,
   getDefaultSecurityConfig,
-  JSON_ALL_CONFIG
+  JSON_ALL_CONFIG, SecurityConfigModels, validateSecurityConfig
 } from '@home/pages/device/lwm2m/security-config.models';
 import {TranslateService} from '@ngx-translate/core';
 import {MatDialog} from '@angular/material/dialog';
@@ -285,15 +285,6 @@ export class DeviceCredentialsComponent implements ControlValueAccessor, OnInit,
   }
 
   private jsonValidator(control: FormControl) {
-    try {
-      JSON.parse(control.value);
-      return null
-    } catch (e) {
-      return {
-        jsonError: {
-          parsedJson: "error"
-        }
-      }
-    }
+    return validateSecurityConfig(control.value) ? null: {jsonError: {parsedJson: "error"}};
   }
 }
diff --git a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts
index f097d9fb23..40ba18ebe9 100644
--- a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts
+++ b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/lwm2m-device-profile-transport-configuration.component.ts
@@ -395,21 +395,4 @@ export class Lwm2mDeviceProfileTransportConfigurationComponent implements Contro
       }
     });
   }
-
-  isPathInJson(path: string): boolean {
-    let isPath = this.findPathInJson(path, ATTRIBUTE);
-    if (!isPath) {
-      isPath = this.findPathInJson(path, TELEMETRY);
-    }
-    return !!isPath;
-  }
-
-  private findPathInJson = (path: string, side: string): string => {
-    if (this.configurationValue.observeAttr) {
-      if (this.configurationValue.observeAttr[side]) {
-        return this.configurationValue.bootstrap[side].find(
-          pathJs => pathJs === path);
-      }
-    }
-  }
 }
diff --git a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/profile-config.models.ts b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/profile-config.models.ts
index 51d7735dd7..7142648061 100644
--- a/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/profile-config.models.ts
+++ b/ui-ngx/src/app/modules/home/components/profile/device/lwm2m/profile-config.models.ts
@@ -27,7 +27,7 @@ export const DEFAULT_ID_SERVER = 123;
 export const DEFAULT_ID_BOOTSTRAP = 111;
 export const DEFAULT_HOST_NAME = 'localhost';
 export const DEFAULT_PORT_SERVER_NO_SEC = 5685;
-export const DEFAULT_PORT_BOOTSTRAP_NO_SEC = 5686;
+export const DEFAULT_PORT_BOOTSTRAP_NO_SEC = 5687;
 export const DEFAULT_CLIENT_HOLD_OFF_TIME = 1;
 export const DEFAULT_LIFE_TIME = 300;
 export const DEFAULT_MIN_PERIOD = 1;
diff --git a/ui-ngx/src/app/modules/home/pages/device/lwm2m/security-config.models.ts b/ui-ngx/src/app/modules/home/pages/device/lwm2m/security-config.models.ts
index 37720d93a4..a42757d326 100644
--- a/ui-ngx/src/app/modules/home/pages/device/lwm2m/security-config.models.ts
+++ b/ui-ngx/src/app/modules/home/pages/device/lwm2m/security-config.models.ts
@@ -20,7 +20,6 @@ export const DEFAULT_END_POINT = 'default_client_lwm2m_end_point_no_sec';
 export const BOOTSTRAP_SERVERS = 'servers';
 export const BOOTSTRAP_SERVER = 'bootstrapServer';
 export const LWM2M_SERVER = 'lwm2mServer';
-export const JSON_OBSERVE = 'jsonObserve';
 export const LEN_MAX_PSK = 64;
 export const LEN_MAX_PRIVATE_KEY = 134;
 export const LEN_MAX_PUBLIC_KEY_RPK = 182;
@@ -148,4 +147,41 @@ export function getDefaultSecurityConfig(): SecurityConfigModels {
   return securityConfigModels;
 }
 
+const isSecurityConfigModels = (p: any): p is SecurityConfigModels =>
+  p.hasOwnProperty('client') &&
+    isClientSecurityConfigType(p['client']) &&
+  p.hasOwnProperty('bootstrap') &&
+    isBootstrapSecurityConfig(p['bootstrap']);
+
+const isClientSecurityConfigType = (p: any): p is ClientSecurityConfigType =>
+  p.hasOwnProperty('securityConfigClientMode') &&
+  p.hasOwnProperty('endpoint') &&
+  p.hasOwnProperty('identity') &&
+  p.hasOwnProperty('key') &&
+  p.hasOwnProperty('x509');
+
+const isBootstrapSecurityConfig = (p: any): p is BootstrapSecurityConfig =>
+  p.hasOwnProperty('bootstrapServer') &&
+    isServerSecurityConfig(p['bootstrapServer']) &&
+  p.hasOwnProperty('lwm2mServer') &&
+    isServerSecurityConfig(p['lwm2mServer']);
+
+const isServerSecurityConfig = (p: any): p is ServerSecurityConfig =>
+  p.hasOwnProperty('securityMode') &&
+  p.hasOwnProperty('clientPublicKeyOrId') &&
+  p.hasOwnProperty('clientSecretKey');
+
+export function validateSecurityConfig(config: string): boolean {
+  try {
+    const securityConfig= JSON.parse(config);
+    if (isSecurityConfigModels(securityConfig)) {
+      return true;
+    } else {
+      return false;
+    }
+  } catch (e) {
+    return false;
+  }
+}
+