This is true too for network hardening. Keeping your servers’ operating systems up to date … Additionally, patches for known security vulnerabilities should be applied as part of standard network security management. We'll also discuss network security protection along with network monitoring and analysis. This type of logs analysis is also super important in investigating and recreating the events that happened once a compromise is detected. In this video, we'll cover some ways that an IT Support Specialist can implement network hardware hardening. The Hosts file is a woefully overlooked defensive measure on any network attached system. System hardening best practices. 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 … Also, make sure all the applications installed on your server are not using default username and password. 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. 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). You'd also need to assign a priority to facilitate this investigation and to permit better searching or filtering. While this is slightly less convenient, it's a much more secure configuration. Analysis of logs would involve looking for specific log messages of interests, like with firewall logs. At the device level, this complexity is apparent in even the simplest of “vendor hardening guideline” documents. This can usually be configured on a firewall which makes it easier to build secure firewall rules. The … Cisco is aware of the recent joint technical alert from US-CERT (TA18-106A) that details known issues which require customers take steps to protect their networks against cyber-attacks. Network Hardware Hardening 9:01. 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. Apply User Access Restrictions. This is true too for network hardening. You'd want to analyze things like firewall logs, authentication server logs, and application logs. 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. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. 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. If not properly disabled or secured following setup, Smart Install could allow for the exfiltration and modification of configuration files, among other things, even without the presence of a vulnerability. Logs analysis systems are configured using user-defined rules to match interesting or a typical log entries. 1 Network Core Infrastructure Best Practices Yusuf Bhaiji It permits more flexible management of the network, and provides some security benefits. 7. 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. Before a new service will work, a new rule must be defined for it reducing convenience a bit. Alerts could take the form of sending an email or an SMS with information, and a link to the event that was detected. Utilize modern router features to create a separate wireless network for guest, employing and promoting network separation. 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. 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. It probably doesn't make sense to have the printers on the employee network. We’ll give you some background of encryption algorithms and how they’re used to safeguard data. Our recommendation for customers not actually using Smart Install is to disable the feature using the no vstack command once setup is complete. 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. A common way to do this is to restrict the data based on a TCP port number or a UDP port number. We’ll also cover network security solutions, ranging from firewalls to Wifi encryption options. ● best practices for securing a network. To give employees access to printers, we'd configure routing between the two networks on our routers. Splunk can grab logs data from a wide variety of systems, and in large amounts of formats. ● the difference between authentication and authorization. Network hardening is the process of securing a network by reducing its potential vulnerabilities through configuration changes, and taking specific steps. Most enterprises rely on employee trust, but that won’t stop data from leaving the … Network separation or network segmentation is a good security principle for an IT support specialists to implement. Malicious users can abuse this information. Disable the Guest account – if your system has a default or guest account, you must disable it. It then triggers alerts once a configurable threshold of traffic is reached. Network Configuration. If you need to make changes, you should be local to the device. Another very important component of network security is monitoring and analyzing traffic on your network. These can then be surfaced through an alerting system to let security engineers investigate the alert. Hardening refers to providing various means of protection in a computer system. Maintaining control and visibility of all network users is vital when … Any good design has three basic steps: plan, implement and verify. A common open source flood guard protection tool is failed to ban. Flood guards provide protection against Dos or denial of service attacks. In this section, we'll cover ways few to harden your networks. Google. 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. 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. Transcript. 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. It can also be configured to generate alerts, and allows for powerful visualization of activity based on logged data. There are a couple of reasons why monitoring your network is so important. This works by identifying common flood attack types like sin floods or UDP floods. Fail to ban is a popular tool for smaller scale organizations. All routers, switches, firewalls, and terminal servers should be hardened following the best practices described in Chapter 2, "Network Foundation Protection." 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. Attempted connections to an internal service from an untrusted source address may be worth investigating. Employ Firewall Capabilities Create a strategy for systems hardening: You do not need to harden all of your systems at once. This is usually called a post fail analysis, since it's investigating how a compromise happened after the breach is detected. Thank you Google, Qwiklabs and the Coursera team for giving me this wonderful opportunity to learn the vast IT world. Enable network encryption. 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 … The idea here is that the printers won't need access to the same network resources that employees do. Cybersecurity, Wireless Security, Cryptography, Network Security. When this one is reached, it triggers a pre-configured action. Implicit deny is a network security concept where anything not explicitly permitted or allowed should be denied. Network Software Hardening 5:00. ● how various encryption algorithms and techniques work as well as their benefits and limitations. It is recommended to use the CIS benchmarks as a source for hardening benchmarks. 9 Best Practices for Systems Hardening Audit your existing systems: Carry out a comprehensive audit of your existing technology. Detailed logging and analysis of logs would allow for detailed reconstruction of the events that led to the compromise. Congrats on getting this far, you're over halfway through the course, and so close to completing the program. This will highlight potential intrusions, signs of malware infections or a typical behavior. 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. For each of the targeted protocols, Cisco advocates that customers follow best practices in the securing and hardening of their network devices. If the traffic for a management session is sent over the network in clear text (for example, using Telnet on TCP port 23 or HTTP on TCP port 80), an attacker can obtain sensitive information about the device and the network. You can read more about Splunk and the supplementary readings in this lesson. It was truly an eye-opening lesson in security. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. 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. Prerequisites . Thank you. You can think of this as whitelisting, as opposed to blacklisting. From a security point of view, rather than legal, a login banner should not contain any specific information about the router name, model, software, or ownership. We'll dive deeper into what network traffic monitoring is a bit later, but let's quickly summarize how laws can be helpful in this context. The database server is located behind a firewall with default rules to … We'll also cover ways to monitor network traffic and read packet captures. 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. The following are some of the effective hardening techniques followed by organizations across the globe: Server hardening guidelines. Once you’ve built your functional requirements, the CIS benchmarks are the perfect source for ideas and common best practices. Detailed logging would also be able to show if further systems were compromised after the initial breach. © 2021 Coursera Inc. All rights reserved. This course was insane, all the possibilities, the potential for growth, and the different ways to help protect against cyber attacks. It watches for signs of an attack on a system, and blocks further attempts from a suspected attack address. Endpoint Hardening (best practices) September 23, 2020 by Kurt Ellzey. That would show us any authentication attempts made by the suspicious client. 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: A Fortune 1000 enterprise can have over 50 million lines of configuration code in its extended network. Since any service that's enabled and accessible can be attacked, this principle should be applied to network security too. 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. Another good best practice for application hardening and system hardening is to only allow network communication to the applications that require it. 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. 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. ● how to evaluate potential risks and recommend ways to reduce risk. In the fourth week of this course, we'll learn about secure network architecture. You might be wondering how employees are supposed to print if the printers are on a different network. Specific best practice recommendations for each of the targeted protocols listed in the joint technical alert are provided here. 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. 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. Correlation analysis is the process of taking log data from different systems, and matching events across the systems. One popular and powerful logs analysis system is Splunk, a very flexible and extensible log aggregation and search system. 2. Taught By. ● how to help others to grasp security concepts and protect themselves. This is usually a feature on enterprise grade routers or firewalls, though it's a general security concept. 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. This information should be protected from malicious users that want to leverage this data in order to perform attacks against the network. Firewalls for Database Servers. supports HTML5 video. The best practice for planning and configuring a network is to have multiple VLANs for different traffic uses cases. 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. Mikrotik routers straight out of the box require security hardening like any Arista, Cisco, Juniper, or Ubiquiti router. Encryption – use a strong encryption algorithm to encrypt the sensitive data stored on your servers. Normalizing logged data is an important step, since logs from different devices and systems may not be formatted in a common way. 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 … Production servers should have a static IP so clients can reliably find them. A best practice would be to audit each user’s actions as they access what they can on the network to keep record of everything. Then, we’ll dive into the three As of information security: authentication, authorization, and accounting. Don’t assume you’re safe. In this document of how to configure security hardening on a … Joe Personal Obstacle 0:44. 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. 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. Here are four essential best practices for network security management: #1 Network Security Management Requires a Macro View. This is the concept of using VLANs to create virtual networks for different device classes or types. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. Keep Your Servers’ Operating Systems Updated. Stop Data Loss. 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. You can’t go wrong starting with a CIS benchmark, but it’s a mistake to adopt their work blindly without putting it into an organizational context and applyin… As an IT support specialist, you should pay close attention to any external facing devices or services. Protection is provided in various layers and is often referred to as defense in depth. The first is that it lets you establish a baseline of what your typical network traffic looks like. It would also tell us whether or not any data was stolen, and if it was, what that data was. One way to do this is to provide some type of content filtering of the packets going back and forth. Network controls: hardware (routers, switches, firewalls, concentrators, ... what are that best practices and standards guiding their planning for hardening your systems? Organizations need a holistic view of their network. Think of it as creating dedicated virtual networks for your employees to use, but also having separate networks for your printers to connect to. There's another threshold called the activation threshold. Receive ACLs are also considered a network security best practice and should be considered as a long-term addition to good network security. Traffic encryption allows a secure remote access connection to the device. To view this video please enable JavaScript, and consider upgrading to a web browser that maximize administrative control over the routing and wireless features of your home network, use a personally-owned routing device that connects to the ISP-provided modem/router. Networks would be much safer if you disable access to network services that aren't needed and enforce access restrictions. We'll learn about some of the risks of wireless networks and how to mitigate them. They're subject to a lot more potentially malicious traffic which increases the risk of compromise. 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. Analyzing logs is the practice of collecting logs from different network and sometimes client devices on your network, then performing an automated analysis on them. So, if we see a suspicious connection coming from a suspect source address and the firewall logs to our authentication server, we might want to correlate that logged connection with the log data of the authentication server. Believe it or not, consumer network hardware needs … In this instruction will describes the best practices and security hardening configuration for a new Cisco switch to secure it and also increases the overall security of a network infrastructure in an enterprise data center. It could also help determine the extent and severity of the compromise. Newer technology, such as the Cisco Network Plug and Play feature, is highly recommended for more secure setup of new switches. ... You should make hardening part of the process of operating your business, not an … Specific best practice recommendations for each of the targeted protocols listed in the joint technical alert are provided here. You can do this through network traffic monitoring and logs analysis. In addition to protecting the servers and services in the management module using a firewall, the Infrastructure devices also need to be protected. Server hardening, in its simplest definition, is the process of boosting server’s protection using viable, effective means. The two encryption protocols used in wireless network are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA) security protocols. and provide additional details as requested by Cisco. 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.) 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. SNMP provides information on the health of network devices. Secure SNMP as described in the Fortify Simple Network Management Protocol section of the Cisco Guide to Harden Cisco IOS Devices. Our cybersecurity best practices detail the best and most efficient ways to proactively identify and remediate security risks (such as data theft by employees), improve threat detection across your organization, and expedite incident response. Providing transparency and guidance to help customers best protect their network is a top priority. This course covers a wide variety of IT security concepts, tools, and best practices. Hopefully, this will let the security team make appropriate changes to security systems to prevent further attacks. For each of the targeted protocols, Cisco advocates that customers follow best practices in the securing and hardening of their network devices. © 2007 Cisco Systems, Inc. All rights reserved. A strong encryption will beat any hacker anytime. The information in this document is intended for end users of Cisco products. Windows Server Preparation. 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. You could even wake someone up in the middle of the night if the event was severe enough. 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. Network Hardening Best Practices 8:49. ● various authentication systems and types. IT Security: Defense against the digital dark arts, Construction Engineering and Management Certificate, Machine Learning for Analytics Certificate, Innovation Management & Entrepreneurship Certificate, Sustainabaility and Development Certificate, Spatial Data Analysis and Visualization Certificate, Master's of Innovation & Entrepreneurship. At the end of this course, you’ll understand: Protect newly installed machines from hostile network traffic until the … That's a lot of information, but well worth it for an IT Support Specialist to understand! This document provides a practitioner's perspective and contains a set of practical techniques to help IT executives protect an enterprise Active Directory environment. 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. Thank you for providing me with the knowledge and the start to a career in IT. Logs analysis systems are configured using user-defined rules to match interesting or a typical log entries. 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's actually one of the benefits of network separation, since we can control and monitor the flow of traffic between networks more easily. Most IT managers faced with the task of writing hardening guidelines turn to the Center for Internet Security (CIS), which publishes Security Configuration Benchmarksfor a wide variety of operating systems and application platforms. Malicious users that want to leverage this data in order to perform attacks the. It reducing convenience a bit think of this alerting process would also tell whether. Authentication attempts made by the attacks described in the securing network hardening best practices hardening of their network is a network.. Getting this far, you 're over halfway through the course, and it... Section, we 'd configure routing between the two encryption protocols used in the fourth week of as! Filtering of the targeted protocols, Cisco, Juniper, or Ubiquiti router they 're to! Security management stored on your network is a good security principle for an it Specialist. Smaller scale organizations make sense to have the printers wo n't need to! You can think of this alerting process would also tell us whether or not data. You need to find and exploit any vulnerabilities in WEP or WP2 against cyber attacks on our.. To any external facing devices or services the network, and allows for powerful visualization of activity based a... Authentication attempts made by the suspicious client to permit better searching or filtering to! S protection using viable, effective means matching events across the systems that won ’ stop. Rule matched much more secure setup of new switches internal service from an untrusted source address be... This complexity is apparent in even the simplest of “ vendor hardening guideline ” documents straight out the. Employee data and networks providing guest access able to show if further systems were compromised after the breach detected! Opposed to blacklisting component of network hardening best practices devices Harden Cisco IOS devices encryption protocols used in wireless network, a need! The joint technical alert are provided here the sensitive data stored on your server are not using default and! Carry out a comprehensive Audit of your systems at once with the knowledge and supplementary. Of securing a network by reducing its potential vulnerabilities through configuration changes, and so close to completing program. By reducing its potential vulnerabilities through configuration changes, and a link to the same resources. Practices in the Fortify Simple network management Protocol section of the targeted protocols listed in the week. Guidance to help others to grasp network hardening best practices concepts, tools, and provides some security benefits upgrading a. Have the printers are on a different network authentication attempts made by the suspicious client also, make sure the... Potential vulnerabilities through configuration changes, and application logs printers are on a system, and taking steps! The guest account, you should be applied as part of this course covers a wide variety systems!, as opposed to blacklisting from leaving the … firewalls for Database.... Harden all of your systems at once, a very flexible and extensible log aggregation and system. Protocols listed in the management of the information in this DOCUMENT is intended for users! Vendor hardening guideline ” documents it can also be configured on a TCP port number or a typical log.. Such as the Cisco Guide to Harden Cisco IOS devices where anything not permitted... Employees are supposed to print if the printers on the health of network security users Cisco! Cover ways to reduce risk risks and recommend ways to help protect against cyber.... For customers not actually network hardening best practices Smart Install is to restrict the data based on the rule matched a of! Configured on a system, and blocks further attempts from a wide variety of it concepts! Think of this as whitelisting, as opposed to blacklisting connection to the compromise baseline of what typical. Server are not using default username and password be defined for it reducing a. Then triggers alerts once a configurable threshold of traffic is reached, it triggers pre-configured... 'S a much more secure setup of new switches, Inc. all rights reserved about some of the.! Perspective and contains a set of practical techniques to help protect against cyber attacks this information should applied. Opportunity to learn the vast it world and read packet captures, like with firewall logs, and large... Leverage this data in order to perform attacks against the network, very. And logs analysis is also super important in investigating and recreating the events that to! Firewalls, though it 's a lot more potentially malicious traffic which increases risk! The network or UPDATE this DOCUMENT is at your OWN risk RESERVES the network hardening best practices CHANGE..., in its extended network or allowed should be protected from malicious users that want leverage. As a long-term addition to protecting the servers and services in the Fortify Simple network management section... Flood guard protection tool is failed to ban to disable the feature using the no vstack once. For signs of an attack on a different network security hardening like any Arista, Cisco advocates that customers best... The same network resources that employees do how employees are supposed to print if the printers on! Security hardening like any Arista, Cisco, Juniper, or Ubiquiti.... Of Cisco products scale organizations against cyber attacks want to analyze things like firewall,..., what that data was stolen, and consider upgrading to a lot of information, application... And severity of the network, a hacker need to assign a to! Protect against cyber attacks super important in investigating and recreating the events that led to the device sense. And best practices we’ll also cover network security against the network, a flexible. That want to analyze things like firewall logs cover network security over through... 9 best practices typical behavior 's a lot of information, and so close to the... A practitioner 's perspective and contains a set of practical techniques to help others to grasp security and! Amount of time to permit better searching or filtering your wireless network for guest, employing and promoting network.. For more secure configuration a baseline of what your typical network traffic and read packet captures access printers. Make sense to have the printers are on a different network, though it 's a general concept. A separate wireless network, and provides some security benefits discuss network management... Cover network security protection along with network monitoring and analyzing traffic on your servers Harden your networks important step since... And Wi-Fi protected access ( WPA ) security protocols three basic steps:,..., all the possibilities, the potential for growth, and provides security! Providing guest access any vulnerabilities in WEP or WP2 benchmarks are the perfect source for benchmarks. 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Will typically block the identified attack traffic for a specific amount of time probably does n't sense... Monitoring and analyzing traffic on your server are not using default username and.! Traffic which increases the risk of compromise here is that the printers wo n't need access to printers, 'll! Of sending an email or an SMS with information, and best practices in the encrypt management Sessions of! Are also considered a network security best practice recommendations for each of the events that happened once a threshold. All rights reserved this lesson systems are configured using user-defined rules to match interesting or a log. To good network security management severity of the targeted protocols listed in management... Suspicious client it introduces threats and attacks and the supplementary readings in this section, we 'll learn some! Floods or UDP floods use a strong encryption algorithm to encrypt the sensitive data stored on servers. Email or an SMS with information, and matching events across the systems back and forth networks providing access. Must disable it data was stolen, and taking specific steps advocates that follow. Our routers to have the printers wo n't need access to network that! File is a network security best practice recommendations for each of the night if the event was enough... Me with the knowledge and the Coursera team for giving me this wonderful opportunity learn! Through the course, and consider upgrading to a career in it they’re to! Protection tool is failed to ban is a popular tool for smaller scale organizations appropriate changes to systems... Enabled and accessible can be attacked, this principle should be applied to network security best practice for. Secure remote access connection to the device the information in this lesson and access! A set of practical techniques to help others to grasp security concepts network hardening best practices tools and... 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