In today's technological world there are many vulnerabilities to the computer networks. If a malicious attacker exposes these vulnerabilities your business could be interrupted causing you thousands of dollars in damage. Not only could you lose business by your network going down but also by the lack in consumer confidence, and the possible penalties imposed on you by the government for not properly securing your customers vital information. There are several methods or concepts available to the network administrators to help them in securing their networks. The concept of defense-in depth, which is a concept that uses multiple defense strategies. This is a concept that all network administrators and security personnel should practice. Using this method will add several layers of security to your network. Two of those concepts or solutions are DMZ’s (Demilitarized Zones) and IDS’s (Intrusion Detection Systems). A DMZ is a neutral area between your private, or internal network, and public networks, which are commonly known as the Internet, where you can place services that need to have access and be accessed by the public network. A IDS is a solution or system that if managed and configured properly will assist in the protection of your network by telling you if someone has attempted to gain access or has gained access to your network.
There are two basic types DMZ’s, which are back to back and three homed. The back-to-back is placed between two firewalls, which are either program or hardware setups used to block unwanted traffic. The three-homed DMZ is one that has three separate networks. One network goes to the public network, the other goes to your private network, and the third is the one that contains those machines that are running the applications or services that you have in your DMZ. Each company can configure their DMZ with whatever services they want, so although they might be the same basic type they will still be different. One can also have multiple zones within their DMZ so that it adds protection in case one of their zones gets intruded and brought down, the others will still be operational. One can have separate levels of security added to those zones so that the different applications can be grouped into different security levels. Other solutions can be added to your DMZ, some of those are Honeypots, and IDS’s. Honeypots are programs designed to invite attackers to gain access to it so that the attacker’s methods and tools used are recorded.
In order to protect the application servers from the internet, the most common un-trusted network, the proposal suggests a firewall to be installed between the internal network and external router. The firewall would be an Adaptive Security Appliance (ASA) firewall, "the ASA is not just a pure hardware firewall. In brief, the Cisco ASA is a security device that combines firewall, antivirus, intrusion prevention, and virtual private network (VPN) capabilities. It provides proactive
The webserver will be placed in a protected area, called a Demilitarized Zone (DMZ), outside the corporate network. The DMZ will be protected by a hardened firewall server called a Bastion server. The Bastion server’s services are limited and the configuration is changed to make the server
IDS is a device or software application that monitors a network for an unauthorised attack.
Business ventures can benefit from virtual firewalls to protect access and data at lower costs than traditional methods. It is also beneficial to have an experienced security professional who is aware of your security needs. Virtual security involves the use of advanced controls such as a virtual switch to protect against malicious attacks coming from unverified sources. Applications are isolated to make them untouchable by malware, viruses and even applications that may stop execution (Marshall, 2011).
Two routers demark the border between internet and intranet. Internal to these routers are two more routers, creating the appearance of a demilitarized zone (DMZ). However, there are access points, the wireless antenna system and the remote access server (RAS), that provide deeper intranet access that do not rely on the DMZ, rendering the latter rather decorative than substantial. Lastly, there is the virtual private network (VPN) that makes use of the edge routers and provides greater intranet access. Over all, there are four access points: VPN, two edge routers, the RAS, and the wireless system. The RAS, VPN, and wireless provide internal access.
In 1980, James Anderson’s paper, Computer Security Threat Monitoring and Surveillance, bore the notion of intrusion detection. Through government funding and serious corporate interest allowed for intrusion detection systems(IDS) to develope into their current state. So what exactly is IDS? An IDS is used to detect malicious network traffic and computer usage through attack signatures. The IDS watches for attacks not only from incoming internet traffic but also for attacks that originate in the system. When a potential attack is detected the IDS logs the information and sends an alert to the console. How the alert is detected and handled at is dependent on the type of IDS in place. Through this paper we will discuss the different types of IDS and how they detect and handle the alerts, the difference between a passive and a reactive system and some general IDS intrusion invasion techniques.
Wireless local area networks (WLANs) have the potential to improve the flexibility, productivity, and the quality of work life of an enterprise (Sage Research Staff, 2001). Berean Institute is a typical two year college with about a staff of sixty eight employees and 250 students per semester. Berean teaches cosmetology, barbering and the latest software and hardware technology, which is located in Philadelphia, Pennsylvania. Berean currently has two locations in the Philadelphia area and using a Local Area Network (LAN).
Although Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) have been grouped together here (IDPS), there are distinctions between them. On the most basic level, both will monitor the network...
Network security is a problem that network administrators face. It is something that network administrators should keep a careful eye on. For example, if the home network does not have any security measures in place, then the person is at a high risk of data loss due to hacking. Network security is something that businesses do not take very lightly because they want to protect their valuable information and network resources from hackers. It is a problem because of unauthorized use and can be resolved by increasing the security encryption levels.
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
ABSTRACT : This paper describes the basic threats to the network security and the basic issues of interest in designing a secure network. it describes the important aspects of network security. A secure network is one which is free of unauthorized entries and hackers. INTRODUCTION
The application gateway needs only one network interface and does not require a separate subnet between the application gateway and the router. This permits the firewall to be made more flexible but perhaps less secure by permitting the router to pass certain trusted services ``around'' the application gateway and directly to site systems. The trusted services might be those for which proxy services don't exist, and might be trusted in the sense that the risk of using the services has been considered and found acceptable. For example, less-risky services such as NTP could be permitted to pass through the router to site systems. If the site systems require DNS access to Internet systems, DNS could be permitted to site systems. In this configuration, the firewall could implement a mixture of the two design policies, the proportions of which depend on how many and what types of services are routed directly to site systems.
Implement a system Intrusion Detection/Prevention System (IDS/IPS): - Make the investment in an IDS/IPS to distinguish and prevent potential system dangers. sensors ought to be circulated all through the system, with a specific focus on general society untrusted section. Take alerts very seriously.
People have been using physical security measures such as barriers for protection for centuries (McCrie, 2007). Every living thing uses physical security to protect their home, family, and themselves with some form of barriers. These barriers can be either man-made or natural as long as they define, delay, or detect unauthorized access (Fennelly, 2004). These barriers are used to protect not only the facility but the assets located inside. I will describe these barriers starting from the outside and working into the facility.
The network management plan and security plan is important to help the company figure out how they will improve its network and security procedures for the company. Planning involves outlining objectiv...