Return to the SSH session you have open on the RECEIVING SNMP server, This EVENT line doesn't change as it is already Normal, After the EXEC line press Enter to start a new line, NOTE: This EVENT will only be executed if the service state of 0 exists in the trap in $3, Use the down arrow key until you go past the EDESC line, Note: This EVENT will only be executed if the service state of 1 exists in the trap in $3, This EVENT will only be executed if the service state of 2 or 3 exists in the trap in $3. SNMP v3 traps will not be accepted by Nagios XI unless the server is specifically configured for SNMP v3 traps. Going back to the original trap, you can see all the different values are OBJECTS in this trap: How do you know what object relates to what value? Replacing broken pins/legs on a DIP IC package. Below are two screenshots showing what this tutorial will show you how to do. Configure SNMP to start when the server boots: If you have a firewall configured, ensure that you have UDP port 161 open to your SNMP lookup server. The snmptrapd service is what receives an SNMP Trap from the networking stack and then places it into a spool directory for the snmptt service to process. We can begin to explore how SNMP can be implemented on a system by installing the SNMP agent on some Ubuntu systems. It has no affect whatsoever on the notification to Nagios. Change the EXEC line so it is as follows: Press Enter to save the changes to the existing file. While the protocol itself is very simple, the structure of programs that implement SNMP can be very complex. . Media Coverage I am sure by now you would have figured it out but the way I understand it, SNMP Trap is the opposite of SNMP monitoring, in the sense that your configure an appliance let's say a router for SNMP trap so that if a particular event occurs it notifies a monitoring system. Then addhost entry for each remote box you will monitor. Install Nagios Core on CentOS4.Monitoring Routers and Switches - MIB Browser : https://www.ireasoning.com. The Industry Standard In IT Infrastructure Monitoring. Here's a diagram of the two MIB files. Is that not the case? Documentation, Purchase Online Learn how to configure the MikroTik SNMP feature using the command-line and the web interface by following this simple step by step tutorial. In the following steps, we are going to stop the snmptt service so it does not process the trap. SNMP Trap Translator is the program that runs on the SNMP Receiving server. Add up your normal_check_interval and retry_check_interval*max_check_attempts for services and you'll see that you must wait as long as 9 minutes before getting a notification. To ENABLE snmptrapd on boot and to start it, execute the following commands depending on your OS: If snmptrapd is NOT installed, it will produce output like: If you find that snmptrapd is not installed, you need to follow the guide "How to Integrate SNMP Traps With Nagios XI". Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Los Angeles, California 90017. Contact Us, Awards Videos Below is an explanation of how this all works: NAGIOS-ROOT-MIB.txt is the "top level" MIB file which the NOTIFY file relies on, here is an extract from the start of the file: What is important here is the MODULE-IDENTITY which is called nagios. In the previous two videos I demonstrated how to install Nagios core on CentOS 7 and Monitor Remote Hosts and Services using NRPE agent plugin. At this point it might be helpful to shut each one down and take a snapshot of it before continuing to allow you to go backwards if you make a mistake. Our tech support team is happy to help you with any questions you might have. Monitoring AKCP sensorProbe2 Using SNMP with Nagios XI. What does the EXEC line do now? The snmptrapd service is what receives an SNMP Trap from the networking stack and then places it into a spool directory for the snmptt service to process. And now well create a new /etc/snmp/snmpd.conf: The above text is noted with basic information on the function of each configuration line. If for example you had a Dell device, their PEN is 674, so they would have: .1.3.6.1.4.1.674 = Enterprises # 674 = Dell Inc. You had a service on the sending server that you forced an immediate check to be scheduled, The check triggered a threshold which made it enter a warning state, The sending server sent a trap to the receiving server, Read through the MIB file and find any SNMP Traps, Add these traps to the snmptt configuration file, These traps are added as EVENTS to the new file, EVENTS tell the SNMPTT service what to do with the SNMPT Trap, Multiple SNMP Trap services in Nagios XI to reflect each monitored service of the CentOS server, Only send important information to Nagios XI (don't cloud the issue with too much information), Service status to be correctly reflected (OK / WARNING / CRITICAL / UNKNOWN), This is because the SNMP Traps that arrive for the. This is where a MIB comes into play. Now you are monitoring this CentOS server and you will be using it in testing to trigger SNMP traps. You need to make some more changes to the/etc/snmp/snmptt.conf file before the service state will be reflected. Step 5: Installing and Configuring Nagios Core. The last step is the configure services. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. With that being the case, this leaves three lines remaining which are configurable: This line contains the OID which is matched against. For any support related questions please visit the Nagios Support Forums at: Article Number: 401 | Rating: 1/5 from 2 votes | Last Updated by. There are hundreds of community-contributed SNMP addons and projects on Nagios Exchange. Security has always been the cornerstone of any Linux software. SNMP means Simple Network Management Protocol. There are hundreds of community-contributed SNMP addons and projects on Nagios Exchange. These steps help confirm that the snmptrapd service is working correctly. Here are the OBJECTS that exist in the trap: In the SNMPTT config file, these values can be referenced as: With this in mind, here's the new EXEC line broken down: The name of the service we are sending a Passive check for is "SNMP Traps - Users", NO performance data is being sent so we are providing empty quotes, The status data we are sending is "USERS WARNING - 1 users currently logged in". In this example192.168.5.178is the ip address of the remote host. This was intentional as part of the tutorial. FYI: copy paste from another forum Ahmed The snmpttconverttmib command will take the traps from a given MIB and create the necessary config for SNMPTT to pass on to Nagios. Installing Nagios Core and Nagios Plugin in Linux. 1. yum install mlocate and then updatedb, then search. This will enter a WARNING state again and will send another trap. ), This is a text file containing all the information about specific OIDs and how they relate to each other, Think of each number as a branch in a tree. AllView is assigned to the entire OID tree, and all of this is referenced in an SNMP poll by the secret, and uniquecommunity stringtes90w90t. Contact Us, Awards By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. In addition to this you will see the host state of the CentOS server change on the SNMP Receiving server (or will it?). Why are physically impossible and logically impossible concepts considered separate in terms of probability? When using the vieditor: Establish an SSH session to the Nagios server that is receiving SNMP Traps and execute the command for your operating system (OS): RHEL 7+ | CentOS 7+ | Oracle Linux 7+ | Debian | Ubuntu 16/18/20. This document describes how to configure Nagios XI to SNMP traps to other management hosts or network management systems whenever host or service state changes (alerts) occur. Contact Sales As such create a backup of the configuration file as shown below . To create all these SNMP Trap - xxx services: At the bottom next to With Selected click the Play button (Configure), Now you will have all the SNMP Trap - xxx services created, Now you can bring the CentOS server online and all of these services will be updated, Return to the console session to your CentOS VM, Now you have all the SNMP Trap services receiving data for the CentOS host. Careers. Engage with the community of users including those using the open source solutions. Steps below will require you to restart the snmptrapd service, the commands for your OS are as follows: Steps below will require you to stop the snmptrapd service, the commands for your OS are as follows: When SNMP Traps are working correctly they are placed into the spool folder by snmptrapd and almost instantly snmptt processes the spooled trap and then deletes it. Nagios XI provides complete monitoring of SNMP (Simple Network Management Protocol). This contains all the information about this MIB and it ends with ::= {nagios 1}. Just to be really clear, the SNMP Sender server is NOT required in your real world production environment, it is purely used as a training tool in this tutorial. Now execute the following command to start snmptrapd in the console: Any traps received will now be output on the screen. Testimonials When prompted below you will need to define a valid default gateway and correct DNS servers. To see if the file exists type the following command: Which should show a directory listing of the spooled traps, for example they are named: You can view the contents of the trap with the following command: The first line is the number 1427244215, this is the time stamp of when the trap was received (epoch value). For example with a UPS (battery backup), as soon as the device loses power, it will send a trap to say "hey, I lost power". It was initially based on Nagios, and extended this with a number of new components. What this means is that this module follows the nagios OID (.1.3.6.1.4.1.20006) and is number 1, hence you end up with ".1.3.6.1.4.1.20006.1". Generally, managed devices are components in an IT network, such as modems, switches, hubs, routers, etc. After you are done with your modifications, save the file, exit and restart the snmpd service. Unless you have very intimate knowledge of the web server and the jsp you're monitoring, making it trap upon a broken load will likely be impossible. locate check_snmp. So this is correct the, the trap was related to the CentOS server which had the hostname of CentOS. The Ent Value 0-3 fields are the OBJECTS being sent with the trap. Once you've completed troubleshooting make sure you start the snmptt service again with the following command for your operating system (OS): Then confirm the spooled files have been processed with the following command: Which should show an empty directory listing. Devices that have SNMP functionality can provide active and passive monitoring. So when the EXEC line sends the severity using the "$s" variable, the service will be reflected accordingly. Nortel check_snmp_nortel_core. In Part 2 of the tutorial we'll delve into much detail about how this works and by the end you'll be on your way to mastering SNMP Traps. Contact us on our online support forum at https://support.nagios.com/forum. They were NAGIOS-ROOT-MIB.txt and NAGIOS-NOTIFY-MIB.txt. check_command check_snmp!-C public -o sysUpTime.0. Now it is correctly reflecting the Warning status. Another problem which can delay SNMP traps arriving in the snmptt spool directory can be caused by slow DNS lookups. If you are NOT seeing files being created in the directory /var/spool/snmptt/, then there may be a permissions issue. Description = A number that corresponds to the current state of the service: 0=OK, 1=WARNING, 2=CRITICAL, 3=UNKNOWN, Description = The text output from the last service check (i.e. In short, were creating thisscenarios for the polling. Here are a few links to SNMP projects and categories that are most useful when integrating SNMP traps with Nagios: Many people ask how Nagios compares to OpenNMS when it comes to SNMP monitoring, SNMP trap integration, and other features. Find A Partner, Phone: 1-888-NAGIOS-1 At this point we have achieved the following: Throughout this tutorial you have seen that when a trap is received on a Nagios XI server AND it doesn't already exist as a service in Nagios XI, it will appear under the Unconfigured Objects. Nagios, the Nagios logo, and Nagios graphics are the servicemarks, trademarks, or registered trademarks owned by Nagios Enterprises. Then confirm it is created as a file in /var/spool/snmptt/. The goal of this tutorial is to provide step by step instructions to allow you to setup an test environment and see first hand how ~~traps~~ work. This is used to track information related to hardware including health. Wait while it executes the check and the screen updates, it will go into an CRITICAL state as per the picture below: On the SNMP Receiving server you will see that the SNMP Traps service looks like the picture below: Here you can see it has updated the status to reflect the sending server HOWEVER we no longer have any information about the "Users service" which was the previous status. If you are still having problems, your next step is to enable logging. At this point you should have a good understanding of how SNMP Traps are received and handled by Nagios XI. However as you have seen, it looks like there is more information than what is required and also the service state on the receiving server was not updated. In your real world production environment this could be a UPS, Storage Array or any other SNMP Trap sending device. It is a way that servers can share information about their current state, and also a channel through which an administer can modify pre-defined values. At this point it might be helpful to shut each one down and take a snapshot of it before continuing to allow you to go backwards if you make a mistake. Download CentOS2. Millions of users and thousands of companies - ranging from Fortune 500s to small business owners - trust Nagios XI to get the job done. It features several APIs that are used to extend its capabilities to perform additional tasks, is implemented as a daemon written in C for . This makes sense because: One last thing to point out is that this trap contains OBJECTS. Nagios is the leader and industry standard in enterprise-class monitoring solutions. Description = This value is taken from the description directive of the service definition. Thanks for contributing an answer to Stack Overflow! In the next steps you will edit the/etc/snmp/snmptt.conf file and add the extra EVENT statements. Furthering my example, all that is needed is to find the correct "variable . AllUser is assigned to AllGroup and may only use SNMP security model 2c , AllGroup can use the AllView. The Ubuntu family of operating systems is renowned for its stability and ease of Linux is a free and open-source operating system that's popular among developers, businesses, and individuals. Security for accepting SNMP v2 traps is explained in the following KB article: Nagios XI - SNMP Trap Hardening. Now the Nagios XI SNMP Receiver Server is ready to receive SNMP Traps. NOTE: These VM's will require Internet access to install certain components. It allows you to filter SNMP results quickly and effectively to get a comprehensive overview of the information you want to see. Open a web page to http://10.25.5.20/nagiosxi, Wait while the wizard creates the services to monitor the CentOS server, Click the link View status details for CentOS, In a couple of minutes all of these services will appear OK (some might have a warning state like Yum Updates). Nagios can also send SNMP traps to other management hosts, which allows seamless integration with other Network Management Systems. Now that you have uploaded the Nagios SNMP MIBs, the Receiving server will now know what to do with the SNMP Traps it will receive. SNMP is a powerful and ubiquitous management protocol in most IT infrastructures. This section of the tutorial will have a lot more detail. SNMP Trap Nagios XI Wizard Support forum for Nagios Core, Nagios Plugins, NCPA, NRPE, NSCA, NDOUtils and more. Download a free 30-day trial or give the online demo a spin. A MATCH is an expression that must be evaluated to true for the trap to be considered a match to this EVENT definition. Nagios has a script called check_snmp that does this for you. 611 Wilshire Blvd #300. SNMP agent can run with the default configuration settings. Learn how to monitor an AKCP sensorProbe2 device with Nagios XI to be alerted when temperature, humidity, or other environmental variables exceed specific thresholds. Each EVENT will have a different SEVERITY value. Hello, One of the packages nagios-plugins, nagios-plugins-basic, nagios-plugins-extra, nagios-plugins-standard (they may be included in the nagios package anyway, I don't know) include the check_snmp executable which is what you are after. Increased server, services, and application availability, Fast detection of network outages and protocol failures. This will have the NRPE Agent installed on it, Use a Nagios XI VM downloaded from the Nagios Website (2014R2.6 +), Open the XI Web interface on the SNMP Sending server, Observe the current state of the Users service for CentOS, Schedule an immediate check of the Users service for CentOS, Establish an SSH session to the XI SNMP Receiving Server, Upload a MIB file to the SNMP Receiving Server, Add the SNMP Trap Service To SNMP Receiving Server, See the service status on the SNMP Receiving Server, Showing how the current SNMP Trap Receiving configuration is basic and the limitations that come with this, Explaining how to read a MIB and understanding OIDs, Explaining how SNMPTT sends traps to Nagios XI, Edit the SNMPTT configuration file to create custom EVENTS, A lot more information is being display than what is necessary, The service status is not correctly reflected (always showing Ok), All traps are received on just one services, This string is a series of number numbers separated with periods (. This document describes how to monitor Windows Event Logs via SNMP within Nagios XI using the Event to SNMP trap plugin from Nagios Exchange. An SNMP software system running on SNMP manager . disk drive . The next step will show how to use the SNMP Trap wizard to create this service in Nagios XI. For any support related questions please visit the Nagios Support Forums at: Article Number: 77 | Rating: 4.2/5 from 6 votes | Last Updated by. How to match a specific column position till the end of line? Enter enable mode: 3. Client/Linux hosts it may be your Linux server/windows server any client system. It will now go into a Warning state and like the following picture: Establish an SSH session to your SNMP Receiving server. Step 1: Install Apache and PHP Packages. Storage - For the purposes of this guide I am: Selecting Basic Storage Device and click Next, Tick the box Apply my choice to all devices with undetected partitions or filesystems, Provide the static IP Address parameters (10.25.13.10/8). You will get an output similar to the following picture: So what you have confirmed here is that the SNMP Receiving server successfully received a trap from the sending server. Under my install of Nagios Core (from the RHEL repos), my plugins are in /usr/lib64/nagios/plugins not /usr/local/nagios/libexec - also, my install did not include the submit_check_result script but you can grab it . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Connect and share knowledge within a single location that is structured and easy to search. Implementing effective SNMP Trap management with Nagios offers the following benefits: These Nagios solutions provide SNMP Trap management capabilities and benefits: Nagios XI is the most powerful and trusted infrastructure monitoring tool on the market. The FORMAT line is one long string and can contains variables. This adds a line to the snmptrapd.conf file to enable logging. Here you can see the SNMP Sender server is monitoring a CentOS server using NRPE using active checks. This is used in the output and the logging and is also referenced as a variable ($s). Configure the trap from the Admin > Unconfigured Objects menu to create the Host / Service Check in the XI interface for that trap. See Also: Integration Overview, External Commands, Passive Checks, Our tech support team is happy to help you with any questions you might have. Step 6: Customizing Nagios Configuration. Email: sales@nagios.com This is a very basic file and should look like this: If your snmptrapd.conf is different, please correct it (using an editor like "vi") and then restart the snmptrapd service. Support Plans IT. Now send a trap and see how the service appears as in Nagios XI. SNMP traps are often used by organizations to monitor the health and status of the network infrastructure. These steps help confirm that the snmptrapd service is working correctly. There are no attachments for this article. By default the Nagios XI server will accept inbound SNMP v2 traps from any device. below i am mentioning my questions more clearly: 1) how do we setup "SNMP Trap" monitoring in Nagios ? In this specific instance the customer was using an external DNS server (8.8.8.8 = Google public DNS server). Log into the web interface via : http://[SERVER_IP]/nagios ,enter your login information andcheck for new Linux hosts added in nagios core service. SNMP v3 traps will not be accepted by N. Read More; Nagios XI - SNMP Trap Hardening Nagios XI . The Industry Standard In IT Infrastructure Monitoring. Return to your SSH session to your CentOS server, Wait while it executes the check and the screen updates, it will go into an OK state, Now you can see the SNMP Traps service on the SNMP Receiving server has updated, There is quite a bit of information there, you will learn in Part 2 of this tutorial on how to optimize this, The key information here is "CentOS Users 0 OK 0 users currently logged in", Now SSH back into the CentOS server and force an immediate check on the Users service on the SNMP Sending server. Nagios provides complete monitoring of SNMP (Simple Network Management Protocol). Please provide the ad click URL, if possible:. Configure Nagios snmp monitoring. Each object is referencing an OID, so you need to refer to the MIB to understand what the OID is (even though you can probably work it out from reading it). This is useful for determining exactly what snmptrapd is doing with the SNMP Traps it receives. Is there a solution to add special characters from software and how to do it, Bulk update symbol size units from mm to map units in rule-based symbology, Short story taking place on a toroidal planet or moon involving flying. The 'Sending' part: Generating SNMP traps from Windows. Correct. Hope this helps. Making statements based on opinion; back them up with references or personal experience. Thanks, Jonus Joseph. Any help on above 2 points would be highly appreciated. Now you will install the NRPE agent on the CentOS server so we can monitor this server from our SNMP Sender Nagios XI server. User is lowercase 'u' for snmpget and uppercase 'U' for check_snmp, security level is 'l' and 'L' for snmpget/check_snmp respectively. We have two MIB files NAGIOS-ROOT-MIB.txt and NAGIOS-NOTIFY-MIB.txt. For every company out there that has an SNMP enabled device, they would have applied to IANA (Internet Assigned Numbers Authority) to obtain their own Private Enterprise Number (PEN). Ifconfig Command Not Found In CentOS 7 Minimal Installation A How to install Univention Corporate Server, Top Things To Do After Installing Ubuntu 15.04. As of May 25th, 2018, all communications with Nagios Enterprises and its employees are covered under our new. check that template out to verify the settings are the ones you want to use. Argument #4 = Severity. It is a compressed Ubuntu 21.04, nicknamed "Hirsute Hippo" was released in April 2021. Nagios SNMP Trap Interface works equally well with Nagios Core and Nagios XI. Nagios Core is a free and open source tool that allows you to monitor your entire IT infrastructure to ensure hosts, services and applications are functioning properly. Show me a man who lives alone and has a perpetually clean kitchen, and 8 times out of 9 I'll show you a man with detestable spiritual qualities. Also protocol specification goes form -v3 to --protocol=3. This will ensure that the HOST object also gets it's status updated. REMOTE CLIENT SIDE CONFIGURATION: . This article is intended for use by Nagios Administrators who wish to monitor Linux servers with Nagios Coreusing the linux SNMP. These steps explain how to enable the snmptrapd daemon to logging it's output to a file. Establish an ADDITIONAL SSH session to your CentOS server, Minimize the SSH session as we only need it to establish a second user login, Wait while it executes the check and the screen updates, it will go into a critical state, Now it is correctly reflecting the Critical status. The last part of this tutorial will be to add the EVENT statements to the/etc/snmp/snmptt.conf file. In this case it executes a python script and it is the python script that actually does the talking to Nagios. Although we at Nagios try our best to help out on the forums here, we always give priority support to our support clients. That completes the section on OIDs and MIBs. Help Create Join Login. 2) How do we implement SNMP Trap monitoring using Nagios monitoring tool ? Prerequisites: News After that, it will be received automatically and show up in the SNMP Traps service. Website Copyright 2009-2023 Nagios Enterprises, LLC. Answer Hub Similarly you can monitor other OIDs. This document is intended for use by Nagios XI Administrators who wish to learn how SNMP Traps work. Now you'll install the required components on the Nagios XI SNMP Receiver server so it will accept SNMP Traps. 1) I was not waiting long enough for the alerts. Setup your Nagios server as the trap target: 5. There are hundreds of community-contributed SNMP addons and projects on Nagios Exchange. Nagios XI has a built-in wizard that makes the configuration of these SNMP trap events quick and simple. This document describes how to configure Nagios XI to SNMP traps to other management hosts or network management systems whenever host or service state changes (alerts) occur Reviews (0) Be the first to review this listing! However HOW does SNMPTT know which EVENT to use when there are multiple events defined for the SAME OID? Answer Hub NSTI's major goal is to make traps easier to sort, identify and take action upon based on user defined criteria. Nagios Core is free. The way the service state is being reflected in Nagios is when we send the SEVERITY value using the "$s" variable. When you have finished, press CTRL + C to stop snmptrapd and then start the service so it resumes normal operation. Documentation - SNMP Trap Integration. Open a web page to http://10.25.5.30/nagiosxi, Under Monitoring Config click Unconfigured Objects. This is a wizard that streamlines SNMP setup with Linux machines, or any machine that uses the Net-SNMP package. 2. Fortra's Intermapper vs Kaseya Traverse: which is better? How do you get out of a corner when plotting yourself into a corner. Downloaded the sonicwall MIBs from their website. Another way to do this is to disconnect the CentOS server from the network and by doing this all of the services will change their state. SNMP stands for simple network management protocol. You will be instructed to use the command line editor called nano. Just get the OIDs for whatever hardware you want to check and pass the correct arguments to the command. Monitoring SNMP traps allows system administrators to monitor real-time events and network incidents in order to ensure an accurate and healthy monitoring environment. To see the configuration execute the following command: This shows the snmptrapd configuration file. Things you should know about RHCSA Certification Exam RHCSA or Red Hat Certified System administration exam is designed to test your knowledge and skills which Write CSS OR LESS and hit save. Videos Inquire today and let our Quickstart team help you get started with Nagios XI, Up To: Contents Psychz Networks, A Profuse Solutions Company. To learn more, see our tips on writing great answers. Below is a picture showing an SNMP Trap, the EVENT configuration in SNMPTT and the final result in Nagios XI: At this point you have been shown how SNMP Traps integrated into Nagios XI. The Open Source IT monitoring solution that provides dependable monitoring to millions of users worldwide. This opens the Passive Object Monitoring wizard at Step 3 as per the picture below: Wait while the wizard creates the SNMP Traps service, Click the link View status details for snmpsender. Leave the SSH session to your SNMP Receiving server open as we will return to it shortly. 1. A group of one or more administrative machines known as managers. This lets you confirm that the received traps are actually being spooled. This document describes how SNMP Traps work and integrate with Nagios XI. For any support related questions please visit the Nagios Support Forums at: Article Number: 88 | Rating: 3/5 from 6 votes | Last Updated by. Certification ** More videos **. These steps were performed using CentOS-6.5-x86_64-bin-DVD1.iso, Select Install or upgrade an existing system. Nagios provides complete monitoring of switches via SNMP. Please don't fill out this field. Now let's test Critical. To make this as simple as possible we will use two Nagios XI servers and a ~~CentOS~~ server: ~~SNMP~~ Sender. In this article, we will explore how to install You are being shown the configuration step by step so you understand each change you are making. Top. Our Customers Now you will upload them to your SNMP Receiving server.Open a web page to http://10.25.5.30/nagiosxi, Under System Extensions click Manage MIBs, Navigate to your Desktop and double click the file NAGIOS-ROOT-MIB.txt, Navigate to your Desktop and double click the file NAGIOS-NOTIFY-MIB.txt, Return to your SSH session on your SNMP Receiving server.
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