There are a couple of reasons why monitoring your network is so important. Protect newly installed machines from hostile network traffic until the … Production servers should have a static IP so clients can reliably find them. If you want to learn more about how to configure a firewall rules and Linux and other implementations, take a look at the references in the supplementary reading. Endpoint Hardening (best practices) September 23, 2020 by Kurt Ellzey. By the end of this module, you'll understand how VPNs, proxies and reverse proxies work; why 802.1X is a super important for network protection; understand why WPA/WPA2 is better than WEP; and know how to use tcpdump to capture and analyze packets on a network. Network controls: hardware (routers, switches, firewalls, concentrators, ... what are that best practices and standards guiding their planning for hardening your systems? You can think of this as whitelisting, as opposed to blacklisting. 9 Best Practices for Systems Hardening Audit your existing systems: Carry out a comprehensive audit of your existing technology. Network separation or network segmentation is a good security principle for an IT support specialists to implement. Most enterprises rely on employee trust, but that won’t stop data from leaving the … This course covers a wide variety of IT security concepts, tools, and best practices. The course is rounded out by putting all these elements together into a multi-layered, in-depth security architecture, followed by recommendations on how to integrate a culture of security into your organization or team. These can then be surfaced through an alerting system to let security engineers investigate the alert. Thank you Google, Qwiklabs and the Coursera team for giving me this wonderful opportunity to learn the vast IT world. 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. The first is that it lets you establish a baseline of what your typical network traffic looks like. Transcript. There's another threshold called the activation threshold. The … © 2021 Coursera Inc. All rights reserved. The idea here is that the printers won't need access to the same network resources that employees do. This type of logs analysis is also super important in investigating and recreating the events that happened once a compromise is detected. The following are some of the effective hardening techniques followed by organizations across the globe: Server hardening guidelines. 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. Then, we’ll dive into the three As of information security: authentication, authorization, and accounting. This can usually be configured on a firewall which makes it easier to build secure firewall rules. Detailed logging and analysis of logs would allow for detailed reconstruction of the events that led to the compromise. Joe Personal Obstacle 0:44. Logs analysis systems are configured using user-defined rules to match interesting or a typical log entries. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. Additionally, patches for known security vulnerabilities should be applied as part of standard network security management. Newer technology, such as the Cisco Network Plug and Play feature, is highly recommended for more secure setup of new switches. Receive ACLs are also considered a network security best practice and should be considered as a long-term addition to good network security. That's a lot of information, but well worth it for an IT Support Specialist to understand! 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. Follow the guidelines on warning banners as described in the Warning Banners section of the Cisco Guide to Harden Cisco IOS Devices. supports HTML5 video. At the end of this course, you’ll understand: ● best practices for securing a network. ● how various encryption algorithms and techniques work as well as their benefits and limitations. Normalizing logged data is an important step, since logs from different devices and systems may not be formatted in a common way. It was truly an eye-opening lesson in security. Customers who suspect their devices are being potentially exploited by the attacks described in US-CERT Alert TA18-106A should contact their support team (Advanced Services, TAC, etc.) Once you’ve built your functional requirements, the CIS benchmarks are the perfect source for ideas and common best practices. That would show us any authentication attempts made by the suspicious client. In this video, we'll cover some ways that an IT Support Specialist can implement network hardware hardening. It is recommended to use the CIS benchmarks as a source for hardening benchmarks. 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. This will typically block the identified attack traffic for a specific amount of time. This works by identifying common flood attack types like sin floods or UDP floods. 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). It watches for signs of an attack on a system, and blocks further attempts from a suspected attack address. At the device level, this complexity is apparent in even the simplest of “vendor hardening guideline” documents. As you learned in earlier courses of this program, log and analysis systems are a best practice for IT supports specialists to utilize and implement. 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. 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. Attempted connections to an internal service from an untrusted source address may be worth investigating. This is true too for network hardening. Try the Course for Free. You'd also need to assign a priority to facilitate this investigation and to permit better searching or filtering. Also, make sure all the applications installed on your server are not using default username and password. 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 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. You'd want to analyze things like firewall logs, authentication server logs, and application logs. Since any service that's enabled and accessible can be attacked, this principle should be applied to network security too. Believe it or not, consumer network hardware needs … Administration of your router / access point should be "local only", namely, there is no reason to let people from another country access to your network hardware. More information on the use of Smart Install and how to determine/limit the exposure of this feature can be found in the Action Required to Secure the Cisco IOS and IOS XE Smart Install Feature security advisory. We’ll give you some background of encryption algorithms and how they’re used to safeguard data. 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. Google. 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. A Fortune 1000 enterprise can have over 50 million lines of configuration code in its extended network. A common open source flood guard protection tool is failed to ban. As you learned in earlier courses of this program, log and analysis systems are a best practice for IT supports specialists to utilize and implement. This is true too for network hardening. Employ Firewall Capabilities This course was insane, all the possibilities, the potential for growth, and the different ways to help protect against cyber attacks. Another very important component of network security is monitoring and analyzing traffic on your network. Firewalls for Database Servers. ● how to evaluate potential risks and recommend ways to reduce risk. We'll also discuss network security protection along with network monitoring and analysis. We'll also cover ways to monitor network traffic and read packet captures. Specific best practice recommendations for each of the targeted protocols listed in the joint technical alert are provided here. Hardening refers to providing various means of protection in a computer system. It then triggers alerts once a configurable threshold of traffic is reached. As an IT support specialist, you should pay close attention to any external facing devices or services. ● various authentication systems and types. Thank you. Alerts could take the form of sending an email or an SMS with information, and a link to the event that was detected. Update the firmware. 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. This is the receive path ACL that is written to permit SSH (TCP port 22) traffic from trusted hosts on the 192.168.100.0/24 network: This flood guard protection can also be described as a form of intrusion prevention system, which we'll cover in more detail in another video. To give employees access to printers, we'd configure routing between the two networks on our routers. Keeping your servers’ operating systems up to date … 2. When this one is reached, it triggers a pre-configured action. Fail to ban is a popular tool for smaller scale organizations. In the fourth week of this course, we'll learn about secure network architecture. Don’t assume you’re safe. 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. Instead of requiring you to specifically block all traffic you don't want, you can just create rules for traffic that you need to go through. Maintaining control and visibility of all network users is vital when … It's important to know how to implement security measures on a network environment, so we'll show you some of the best practices to protect an organization's network. and provide additional details as requested by Cisco. ● how to help others to grasp security concepts and protect themselves. Congrats on getting this far, you're over halfway through the course, and so close to completing the program. 1 Network Core Infrastructure Best Practices Yusuf Bhaiji This is usually a feature on enterprise grade routers or firewalls, though it's a general security concept. System hardening best practices. Specific best practice recommendations for each of the targeted protocols listed in the joint technical alert are provided here. 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. This is the concept of using VLANs to create virtual networks for different device classes or types. Network Hardware Hardening 9:01. Network Software Hardening 5:00. The database server is located behind a firewall with default rules to … For each of the targeted protocols, Cisco advocates that customers follow best practices in the securing and hardening of their network devices. 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 … Stop Data Loss. In this document of how to configure security hardening on a … … A strong encryption will beat any hacker anytime. SNMP provides information on the health of network devices. Keep Your Servers’ Operating Systems Updated. This will highlight potential intrusions, signs of malware infections or a typical behavior. Protection is provided in various layers and is often referred to as defense in depth. They're subject to a lot more potentially malicious traffic which increases the risk of compromise. You can do this through network traffic monitoring and logs analysis. To break into your wireless network, a hacker need to find and exploit any vulnerabilities in WEP or WP2. Unfortunately, many of these protocols, if not secure according to best practices, provide attackers with information about the devices that can be leveraged for nefarious purposes. 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. Taught By. It introduces threats and attacks and the many ways they can show up. 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. 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