Think back to the CIA triad we covered earlier, availability is an important tenet of security and is exactly what Flood guard protections are designed to help ensure. Hardening refers to providing various means of protection in a computer system. We'll learn about some of the risks of wireless networks and how to mitigate them. In addition to protecting the servers and services in the management module using a firewall, the Infrastructure devices also need to be protected. Then, we’ll dive into the three As of information security: authentication, authorization, and accounting. Receive ACLs are also considered a network security best practice and should be considered as a long-term addition to good network security. Taught By. To give employees access to printers, we'd configure routing between the two networks on our routers. Think of it as creating dedicated virtual networks for your employees to use, but also having separate networks for your printers to connect to. You might be wondering how employees are supposed to print if the printers are on a different network. ● the difference between authentication and authorization. This is true too for network hardening. Network hardening is the process of securing a network by reducing its potential vulnerabilities through configuration changes, and taking specific steps. In the fourth week of this course, we'll learn about secure network architecture. Thank you Google, Qwiklabs and the Coursera team for giving me this wonderful opportunity to learn the vast IT world. Believe it or not, consumer network hardware needs … Since any service that's enabled and accessible can be attacked, this principle should be applied to network security too. Once you’ve built your functional requirements, the CIS benchmarks are the perfect source for ideas and common best practices. The two encryption protocols used in wireless network are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA) security protocols. All routers, switches, firewalls, and terminal servers should be hardened following the best practices described in Chapter 2, "Network Foundation Protection." This will highlight potential intrusions, signs of malware infections or a typical behavior. ... You should make hardening part of the process of operating your business, not an … © 2021 Coursera Inc. All rights reserved. Also, make sure all the applications installed on your server are not using default username and password. © 2007 Cisco Systems, Inc. All rights reserved. Thank you. Logs analysis systems are configured using user-defined rules to match interesting or a typical log entries. We’ll give you some background of encryption algorithms and how they’re used to safeguard data. Cisco security teams have been actively informing customers about the necessary steps to secure Smart Install and the other protocols addressed in the joint alert through security advisories, blogs, and direct communications. ● how to evaluate potential risks and recommend ways to reduce risk. ● various authentication systems and types. The Hosts file is a woefully overlooked defensive measure on any network attached system. To view this video please enable JavaScript, and consider upgrading to a web browser that Network Software Hardening 5:00. We'd also implement network ackles that permit the appropriate traffic, To view this video please enable JavaScript, and consider upgrading to a web browser that. At the device level, this complexity is apparent in even the simplest of “vendor hardening guideline” documents. Utilize a secure HTTP server as described in the Encrypt Management Sessions section of the Cisco Guide to Harden Cisco IOS Devices. It is critical that SNMP (on UDP ports 161 & 162) be properly secured in order to protect the confidentiality, integrity, and availability of both the network data and the network devices through which this data transits. Windows Server Preparation. Customers who do use the feature—and need to leave it enabled—can use access control lists (ACLs) to block incoming traffic on TCP port 4786 (the proper security control). The first is that it lets you establish a baseline of what your typical network traffic looks like. Network Hardening Best Practices 8:49. Before a new service will work, a new rule must be defined for it reducing convenience a bit. THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. Active Directory plays a critical role in the IT infrastructure, and ensures the harmony and security of different network resources in a global, interconnected environment. Encryption – use a strong encryption algorithm to encrypt the sensitive data stored on your servers. For each of the targeted protocols, Cisco advocates that customers follow best practices in the securing and hardening of their network devices. For each of the targeted protocols, Cisco advocates that customers follow best practices in the securing and hardening of their network devices. The following are the key areas of the baseline security applicable to securing the access layer switches: •Infrastructure device access –Implement dedicated management interfaces to the OOB management … Attempted connections to an internal service from an untrusted source address may be worth investigating. That's a lot of information, but well worth it for an IT Support Specialist to understand! Cybersecurity, Wireless Security, Cryptography, Network Security. ● how to help others to grasp security concepts and protect themselves. Network controls: hardware (routers, switches, firewalls, concentrators, ... what are that best practices and standards guiding their planning for hardening your systems? You'd also need to assign a priority to facilitate this investigation and to permit better searching or filtering. There are a couple of reasons why monitoring your network is so important. Best Practices for Keeping Your Home Network Secure As a user with access to sensitive corporate or government information at work, you are at risk at home. One way to do this is to provide some type of content filtering of the packets going back and forth. It permits more flexible management of the network, and provides some security benefits. Alerts could take the form of sending an email or an SMS with information, and a link to the event that was detected. Mikrotik routers straight out of the box require security hardening like any Arista, Cisco, Juniper, or Ubiquiti router. It is highly recommended that customers follow the best practices contained in this document to mitigate the effects of the attacks referenced in US-CERT Alert TA18-106A. Endpoint Hardening (best practices) September 23, 2020 by Kurt Ellzey. We'll also cover ways to monitor network traffic and read packet captures. Fail to ban is a popular tool for smaller scale organizations. The information in this document is intended for end users of Cisco products. In the next few lessons, we'll do a deep dive on the best practices that an IT support specialist should know for implementing network hardening. Joe Personal Obstacle 0:44. This is the concept of using VLANs to create virtual networks for different device classes or types. You could even wake someone up in the middle of the night if the event was severe enough. … We'll also discuss network security protection along with network monitoring and analysis. 1 Network Core Infrastructure Best Practices Yusuf Bhaiji Cisco Smart Install is a legacy feature that provides zero-touch deployment for new switches, typically access layer switches, and incorporates no authentication by design. Newer technology, such as the Cisco Network Plug and Play feature, is highly recommended for more secure setup of new switches. This is true too for network hardening. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. Examples of server hardening strategies include: Using data encryption Minimizing the use of superfluous software Disabling unnecessary SUID and SGID binaries Keeping security patches updated Protecting all user accounts with strong passwords that are changed regularly and cannot … Apply User Access Restrictions. So, if you're the sole IT support specialist in your company or have a small fleet of machines, this can be a helpful tool to use. Google. Network Hardware Hardening 9:01. Employ Firewall Capabilities By ensuring that your processes adhere to these best practices, you can harden data security from top to bottom, and meet or exceed the security … 7. We’ll also cover network security solutions, ranging from firewalls to Wifi encryption options. Network separation or network segmentation is a good security principle for an IT support specialists to implement. If you need to make changes, you should be local to the device. Malicious users can abuse this information. It was truly an eye-opening lesson in security. Providing transparency and guidance to help customers best protect their network is a top priority. Maintaining control and visibility of all network users is vital when … Analysis of logs would involve looking for specific log messages of interests, like with firewall logs. A strong encryption will beat any hacker anytime. Because information can be disclosed in an interactive management session, this traffic must be encrypted so that a malicious user cannot gain access to the data that is transmitted. Don’t assume you’re safe. It would also tell us whether or not any data was stolen, and if it was, what that data was. When this one is reached, it triggers a pre-configured action. In this section, we'll cover ways few to harden your networks. There's a general security principle that can be applied to most areas of security, it's the concept of disabling unnecessary extra services or restricting access to them. This course was insane, all the possibilities, the potential for growth, and the different ways to help protect against cyber attacks. Today’s announcement is another reminder for everyone of the importance to strive for constant improvement in managing vulnerabilities, as well as implementing security hygiene best practices. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. Firewalls for Database Servers. Production servers should have a static IP so clients can reliably find them. Prerequisites . It watches for signs of an attack on a system, and blocks further attempts from a suspected attack address. Protecting in layers means to protect at the host level, the application level, the operating system level, the user level, the physical level and all the sublevels in between. SNMP provides information on the health of network devices. We recommend the following best practices: Use a WIDS solution to monitor for rogue APs in both the 2.4 GHz and 5 GHz spectrum bands. To break into your wireless network, a hacker need to find and exploit any vulnerabilities in WEP or WP2. Additionally, patches for known security vulnerabilities should be applied as part of standard network security management. This course covers a wide variety of IT security concepts, tools, and best practices. This is especially recommended for separation of networks that will be hosting employee data and networks providing guest access . It then triggers alerts once a configurable threshold of traffic is reached. Flood guards provide protection against Dos or denial of service attacks. Server hardening, in its simplest definition, is the process of boosting server’s protection using viable, effective means. Connections from the internal network to known address ranges of Botnet command and control servers could mean there's a compromised machine on the network. You can read more about Splunk and the supplementary readings in this lesson. Specific best practice recommendations for each of the targeted protocols listed in the joint technical alert are provided here. Utilize modern router features to create a separate wireless network for guest, employing and promoting network separation. Traffic encryption allows a secure remote access connection to the device. The protocols leveraged by the attacks described in US-CERT Alert TA18-106A are among the most common protocols used in the management of network devices. This type of logs analysis is also super important in investigating and recreating the events that happened once a compromise is detected. Another good best practice for application hardening and system hardening is to only allow network communication to the applications that require it. A common way to do this is to restrict the data based on a TCP port number or a UDP port number. You might need to convert log components into a common format to make analysis easier for analysts, and rule-based detection systems, this also makes correlation analysis easier. This information should be protected from malicious users that want to leverage this data in order to perform attacks against the network. Splunk can grab logs data from a wide variety of systems, and in large amounts of formats. Hopefully, this will let the security team make appropriate changes to security systems to prevent further attacks. Create a strategy for systems hardening: You do not need to harden all of your systems at once. Disable the Guest account – if your system has a default or guest account, you must disable it. ● best practices for securing a network. To learn about Cisco security vulnerability disclosure policies and publications, see the, Subscribe to Cisco Security Notifications, https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180416-tsa18-106a, Fortify Simple Network Management Protocol, Action Required to Secure the Cisco IOS and IOS XE Smart Install Feature, Cisco Guide to Harden Cisco IOS XR Devices, Cisco Guide to Securing Cisco NX-OS Software Devices, Protecting Your Core: Infrastructure Protection Access Control Lists, Control Plane Policing Implementation Best Practices, Cisco IOS Software Smart Install Remote Code Execution Vulnerability, Cisco IOS Software Smart Install Denial of Service Vulnerability, Cisco IOS and IOS XE Software Smart Install Denial of Service Vulnerability, Cisco IOS and IOS XE Software Smart Install Memory Leak Vulnerability, Cisco Smart Install Protocol Misuse (first published 14-Feb-2017), Cisco IOS and IOS XE Software Smart Install Denial of Service Vulnerability (first published 28-Mar-2018), Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability (first published 28-Mar-2018), Cisco Event Response: Cisco ASA and IOS Vulnerabilities, Cisco Adaptive Security Appliance SNMP Remote Code Execution Vulnerability, Alert (TA18-106A): Russian State-Sponsored Cyber Actors Targeting Network Infrastructure Devices, Russia government hackers attacking critical national infrastructure in UK and US, U.S. pins yet another cyberattack on Russia, U.S., UK officials issue alert on Russian cyber attacks against internet services providers. Some very basic configuration changes can be made immediately to reduce attack surface while also implementing best practices, and more advanced changes allow routers to pass compliance scans and formal audits. This is key because in order to know what unusual or potential attack traffic looks like, you need to know what normal traffic looks like. That would show us any authentication attempts made by the suspicious client. Periodically monitor for rogue APs in both the 2.4 GHz and 5 GHz spectrum bands by using a handheld monitor in areas where there is little or no wireless coverage. Specific best practice recommendations for each of the targeted protocols listed in the joint technical alert are provided here. This is different from blocking all traffic, since an implicit deny configuration will still let traffic pass that you've defined as allowed, you can do this through ACL configurations. It is recommended to use the CIS benchmarks as a source for hardening benchmarks. The following are some of the effective hardening techniques followed by organizations across the globe: Server hardening guidelines. It probably doesn't make sense to have the printers on the employee network. Of compromise to any external facing devices or services accessible can be attacked this! Flexible and extensible log aggregation and search system, what that data stolen... Advocates that customers follow best practices for systems hardening: you do not need to a! Also involve categorizing the alert, based on a TCP port number at the device level, this principle be! Wireless networks and how they’re used to safeguard data the two networks on our routers about some of network!, authentication server logs, and in large amounts of formats in the joint technical alert provided... 'D also need to find and exploit any vulnerabilities in WEP or WP2 resources that employees do triggers once! 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