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diff --git a/ntsimulator/ntsim-ng/utils/sys_utils.h b/ntsimulator/ntsim-ng/utils/sys_utils.h
new file mode 100644
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+++ b/ntsimulator/ntsim-ng/utils/sys_utils.h
@@ -0,0 +1,48 @@
+/*************************************************************************
+*
+* Copyright 2020 highstreet technologies GmbH and others
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+***************************************************************************/
+
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#define STANDARD_NETCONF_PORT   830
+#define STANDARD_FTP_PORT       21
+#define STANDARD_SFTP_PORT      22
+
+#define KS_KEY_NAME                                 "melacon_server_key"
+#define SERVER_PUBLIC_SSH_KEY_PATH                  "/home/netconf/.ssh/melacon.server.key.pub"
+
+//filesystem functions
+bool dir_exists(const char *path);
+bool file_exists(const char *fname);
+void file_touch(const char *fname, const char *content);    //content can be null for just-touching
+char *file_read_content(const char *fname);
+
+int get_int_from_string_with_default(const char *string, int default_value);
+char *get_current_date_and_time(void);
+long int get_microseconds_since_epoch(void);
+
+//networking functions
+bool get_local_ips(const char *ifname, char **ipv4, char **ipv6);
+bool check_port_open(const char *host, uint16_t port);
+
+char *b64_encode(const unsigned char *data, size_t input_length);
+char *str_replace(const char *orig, const char *rep, const char *with);
+
+char *read_key(const char *filename);