Contents • iii Overview Welcome to the JNCIS-SEC Study Guide—Part 2. The purpose of this guide is to help you prepare for your JN JNCIS-SEC Study Guide Chapter 1: Introduction to Junos Security Platforms This Chapter Discusses: • • • • • Traditional routing and security implementations. the front page of the internet. Become a Redditor. and subscribe to one of thousands of communities. ×. 1. 2. 3. JNCIS-SEC Study Guide (self.
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The output shows which licenses have been installed. You define zones under the security configuration stanza. Please send questions and suggestions for improvement to training juniper.
Typically, a standalone firewall is added to the network, increasing costs and maintenance. Furthermore, you must understand the traffic patterns traversing your network.
Functional Zones Functional zones are special-purpose zones that cannot be specified in security policies. The URL whitelist specifies traffic that can bypass antivirus scanning. We use bold style to distinguish text that is input versus text that is simply displayed.
The block-content-type configuration is for HTTP use only. The following checks are performed for HTTP traffic: Due to resource constraints, a default device-dependent limit exists on the maximum content size for a file.
Pools are not necessary for this configuration. Fuideart changes, such as source addresses, destination addresses, and application changes, cause policy re-evaluation as the system performs a policy lookup. The range is 1 to seconds.
You can also assign one or more logical interfaces to a routing instance. Best-in-class firewall and VPN technologies secure the perimeter with minimal configuration and consistent performance.
The graphic also demonstrates URL pattern lists for trusted and untrusted sites called urllistwhite and urllistblack. Generally speaking, the software license restricts the manner in which you are permitted to use the Juniper Networks software, may contain prohibitions against certain uses, and may state conditions under which the license is automatically terminated.
The graphic highlights the required configuration to enable this system process for the device. Fallback and Notification Options Configuration The graphic shows the configuration for the fallback and notification options for full file-based and express antivirus.
The difference is that scan mode all scans every file regardless of the file extension, and scan mode by-extension only scans files matching the extension list. When the scan mode is set to all, the antivirus scanning engine scans every file regardless of the file extension. SRX Series Services Gateways for the branch provide perimeter security, content security, access control, and network-wide threat visibility and control. Session Cleanup If no traffic matches the session during the service timeout, the Junos OS ages out the session and frees it to a common resource pool for a later reuse.
If a file exceeds the compression layer limit, the scan engine either drops or forwards the file based on the configured fallback options.
JNCIS-SEC Study Guide Part-1 – types and number of system-defined zones
The traditional router begins by forwarding all traffic. Following the flowchart, you can track the progress of the packet through the services gateway: Some branch devices are equipped with a separate regular expression REGEX content processor to provide hardware-based pattern matching for IDP and antivirus acceleration.
Mail protocols support the content filtering attributes MIME patterns, file extensions, and protocol commands. Typical Treatment of Security Other than implementing standard access control using IP header information, most routers are not equipped to secure a network. Under the user-defined name is a list of matching criteria and specified actions, similar to a Junos routing policy.
The default value and configurable range are in packets per second and vary by device type. Furthermore, because the IP packet is small, no legitimate reason exists for it to fragment.
Juniper Networks, Inc. (Author of JNCIS-SEC Study Guide – Part 1)
Under the custom-objects hierarchy, you configure the local whitelists and blacklists. The SRX device generates a log message indicating the action taken. This option uses an in-the-cloud server which keeps a database of categories for websites.
The application proxy contains a protocol parser, which extracts the application studj information. All traffic to or from the Null Zone is dropped.
Bernstein and Eric Shenk. Zones This Chapter Discusses: The source NAT rule illustrates the parameters set by the configuration with an associated action of translation using pool A.
Additional Services The growth in network security has resulted in additional services provided by standalone firewalls such as Secure Sockets Layer SSL network access, intrusion detection and prevention IDPapplication-level gateway ALG processing, and more.
The UTM policy is applied to a security policy, which determines if the protocol of a traffic flow matches the antivirus profile.
Note that the returned query value reports the IP address as spam. You also specify the action to be taken depending on the site reputation returned for the URL if there is no category match found.
Note that SCREEN processing occurs before any packet processing, which results in fewer resources used and better protection of the Junos kncis-sec platform itself.