Desktop Environments and Window Managers", Expand section "C.3. It makes a simple request that consists of three elements: # snmpget -v 2c -c demopublic test.net-snmp.org SNMPv2-MIB::sysUpTime.0 SNMPv2-MIB::sysUpTime.0 = Timeticks: (586731977) 67 days, 21:48:39.77. If the snmpd agent is running, enter the following command to stop the agent: You can replace your snmpd.conf file with one of the examples in the following sections. Configuring IPv6 Tokenized Interface Identifiers, 12.2.1. Install and Configure SNMP client on Linux by Free Linux 3 min read 1 Comment The following procedure will install and configure snmp daemon on your Redhat-based distribution such as CentOS & Fedora. Additional Resources", Expand section "17.1. We have seen what is available in net-snmp to use SNMP for monitoring Linux servers. Adding a Manycast Client Address, 22.16.7. If one or more of these packages are missing you can run the appropriate command from the following commands: After you have verified and installed all the packages, you can create the net-snmp configuration file and start the snmp service (agent). Running the httpd Service", Collapse section "18.1.4. > Package lm_sensors.i386 0:2.10.7-9.el5 set to be updated Enter encryption pass-phrase: Simply install and configure SNMP agents on your servers, install an On-Premise Poller, and your server for monitoring. If you choose to use SNMP version 3, you should disable unencrypted access to the server to prevent unauthorized access.In order to do that, comment out all lines starting with com2sec or access, as well as all lines starting with rocommunity or rwcommunity from your snmpd configuration file. With alternatives aplenty and major vendors moving on from SNMP, it seems unnecessary to go through the trouble of setting it up alongside modern monitoring tools. . Configuring the named Service", Collapse section "17.2.1. Restart the snmpd daemon with systemctl restart snmpd and the Linux SNMP host is ready to answer SNMP requests. In this article, we will show you how to configure SNMP on a Linux server. Configuring Yum and Yum Repositories", Expand section "9.2. Running the At Service", Expand section "28. Working with Modules", Collapse section "18.1.6. In SNMP, the default port number is 161. Below are more examples that show the possible ways to create snmp version 3 users and enabling them for read-only access.We strongly advise against using SNMP version 3 without authentication and encryption. .1.3.6.1.2.1.1.3.0. snmpget retrieves data from an SNMP host. Using and Caching Credentials with SSSD", Collapse section "13.2. Viewing Block Devices and File Systems", Collapse section "24.4. To test an SNMP configuration, you can use the snmpwalk command : version V1 or v2c ((it is recommended to use v2c) This example sets the maximum number of times to resend an inform, the number of seconds to wait for an acknowledgment before resending, and the maximum number of informs waiting for acknowledgments at any one time. You must check if the snmpd agent is running. Configuring a Multihomed DHCP Server, 17.2.2.4.2. Managing Users via Command-Line Tools", Collapse section "3.4. Samba Network Browsing", Collapse section "21.1.9. Configuring a Samba Server", Collapse section "21.1.4. With iptables, open it with: $ iptables -A INPUT -s -p udp -m udp --dport 161 -j ACCEPT Advanced Features of BIND", Expand section "17.2.7. Viewing and Managing Log Files", Collapse section "25. Total 408 kB/s | 1.4 MB 00:03 Creating Domains: Primary Server and Backup Servers, 13.2.27. You will need to change these settings to match your local environment. This is an example of how to add the plugin check_load from /opt/plugins/ to another machine and then run it via SNMP.This is just to show how to run a binary file via the extend command, you would probably want to use your own plugin file.Assuming that you have acquired your own or the check_load plugin and placed it in /tmp/check_load on the machine you would like to run it on. Its syntax is identical to snmpget: # snmpgetnext -v 2c -c demopublic test.net-snmp.org sysUpTime Integrating ReaR with Backup Software", Collapse section "34.2. SNMP v2u never really took off, but part of its features were used to develop v3. The following is a working example of a snmpd.conf file for SNMPv2. Installing snmptrapd On Debian and Ubuntu, you can install snmptrapd with the apt package manager: sudo apt install snmptrapd Create an SNMPv3 user: Note the following: The full command usage is: This command will automatically add information to the /var/lib/net-snmp/snmpd.conf and /etc/snmp/snmpd.conf configuration files. Configuring Alternative Authentication Features", Expand section "13.1.4. These fields appear if you selected SNMP V1 or SNMP V2 in the SNMP Version field. Samba Server Types and the smb.conf File", Expand section "21.1.7. I'm going to explain ESXi SNMP configuration using an example with one ESXi 7.0 host and one Ubuntu Linux machine on which monitoring software is installed. One of many possible examples is how to set a random string to be returned when queried: $ snmpset -v 1 -c demopublic test.net-snmp.org ucdDemoPublicString.0 s "hi there! Use Remote Desktop to log in to your server. Check snmpd if its working using snmp utilities like snmpwalk. Using The New Template Syntax on a Logging Server, 25.9. Desktop Environments and Window Managers", Collapse section "C.2. Kernel, Module and Driver Configuration", Collapse section "VIII. SNMP is a network management protocol that is used to manage and monitor network devices. Click "Services," "Applications," and "Services" again. Connecting to a Network Automatically, 10.3.1. Edit the snmpd file. Understanding Linux Journaling Filesystems: Exploring Its Reliability Security And Benefits, How To Get Your Old I386 Applications Running On Modern Linux Systems, Using Kerberos For Secure Network Access On Linux Systems. Install SNMP. The Apache HTTP Server", Collapse section "18.1. Viewing CPU Usage", Expand section "24.4. Managing the Time on Virtual Machines, 22.9. Using OpenSSH Certificate Authentication, 14.3.3. Domain Options: Using IP Addresses in Certificate Subject Names (LDAP Only), 13.2.21. Setting up the sssd.conf File", Collapse section "14.1. Configuring kdump on the Command Line, 32.3.5. The installation and configuration of >Debian 10 Buster for monitoring by either SNMP v2c or v3 using both methods. Configure the Firewall Using the Command Line", Expand section "22.19. Additional Resources", Collapse section "21.3.11. Files in the /etc/sysconfig/ Directory", Expand section "D.1.10. service snmpd restart. Changing the Database-Specific Configuration, 20.1.5. OP5 Monitor - How to understand possible causes for an empty event log page. To test the snmpd agent and the new configuration file, enter the following at the command prompt: To test the snmpd agent and the new configuration file, enter the following at the command prompt. We will walk you through how to install and configure SNMP on Linux in this tutorial. ================================================================================ How to test a SNMP configuration on Linux, Managing a MegaRAID controller with MegaCli, Hbergement datacenter, Tlphonie entreprise, fibre ddie. Using OpenSSH Certificate Authentication", Collapse section "14.3. Migrating Old Authentication Information to LDAP Format, 21.1.2. Mail Transport Protocols", Expand section "19.1.2. When installed, it creates an SNMP host that can accept requests from another host and respond to them, issuenotifications (TRAPs and INFORMs in SNMP parlance), and performsome self-monitoring tasks. Install SNMP sudo apt install snmpd snmp libsnmp-dev When prompted, type "Y" to continue Make a backup of the original snmpd.conf file:. Installing and Managing Software", Expand section "8.1. Add the following to your snmp.conf (usually /etc/snmp/snmpd.conf, as stated above): Create the temporary example script file: And add the following example code to it: You can now perform an snmpwalk to verify that everything is working: You should be able to find the following information in the output: To run your script from monitor, just add the host you just configured and add the check check_by_snmp_extend_v3 with the following check command arguments: The result should be an OK check result with the output "Hello world!". You may need to install the snmptrapd Debian package before you can configure the username. Creating Domains: Kerberos Authentication, 13.2.22. /etc/sysconfig/system-config-users, D.2. Firewall Configuration - Open UDP Port After installing and checking the default configuration, the next step that needs to be done is to open firewall port, snmp protocol run on UDP port 161. firewall-cmd --permanent --add-port=161/udp. Thats basically all that is needed to communicate through SNMP between hosts. File System and Disk Information, 24.6.5.1. Configuring Net-SNMP", Expand section "24.6.4. If you want to receive trap messages in PRTG, you will need to set up a SNMP Trap Receiver Sensor. Connecting to a Samba Share", Collapse section "21.1.3. Using the Kernel Dump Configuration Utility, 32.2.3. Keyboard Configuration", Expand section "2. The SNMP protocol is a standard protocol that is used to remotely obtain the status of servers and infrastructure components. snmpd uses by default UDP port 161. Other options are noAuthNoPriv and authNoPriv but are not recommended. Enabling the mod_ssl Module", Expand section "18.1.10. Launching the Authentication Configuration Tool UI, 13.1.2. Samba with CUPS Printing Support, 21.2.2.2. Configuring PPP (Point-to-Point) Settings, 11.2.2. Both are supported by the Net-SNMP agent. Configure the Firewall Using the Command Line", Collapse section "22.14.2. Synchronize to PTP or NTP Time Using timemaster", Collapse section "23.9. Redirect http users to mobile site using Apache mod_rewrite via user-agent detection, Configure Centralized Syslog server in Linux & setup syslog clients on different platforms. The example configuration files contain the basic settings that. SNMP is a network management protocol that is used to monitor network-attached devices for performance, security, and other information. # Here we define who the agent will send traps to. There is currently a net-snmpd -L *br. Use your IP addresses and other values for the . The SNMP Trap Daemon is used to receive and log SNMP traps from these devices. Configuring an OpenLDAP Server", Collapse section "20.1.3. We will use UCD SNMP MIB since it contains the most system performance data On the Linux machine it's located in the /usr/share/snmp/mibs directory. SNMPv2-MIB::sysORDescr.6 = STRING: The SNMP Management Architecture MIB. Configuring System Authentication", Expand section "13.1.2. Command Line Configuration", Collapse section "2.2. Configuring PTP Using ptp4l", Expand section "23.1. Stop SNMP service 3. System Monitoring Tools", Collapse section "24. If snmp works after the configuration above then it is either an misconfigured snmpd.conf file or snmp view limitations. Mail Delivery Agents", Collapse section "19.4. Configuring Protected EAP (PEAP) Settings, 10.3.9.3. Now, we need to take a look at how to configure SNMP on Linux. Loading a Customized Module - Persistent Changes, 31.8. However, if SNMP itself isn't configured correctly then it can't be added as a resource monitoring source. Configuring System Authentication", Collapse section "13.1. Despite the issues, lack of performance improvements of the protocol, and its growing list of alternatives, SNMP isleaving us not just yet. Check access to our server, 10.10.10.10, from a client connection using a few sample snmpget and snmpwalk commands. On a regular Ubuntu system, the agent can be installed using the instructions. Configuring Fingerprint Authentication, 13.1.4.8. By clicking the double-click on the SNMP Service in the right pane, you can access it. Basic Configuration of Rsyslog", Collapse section "25.3. $ sudo nano /etc/snmp/snmpd.conf SNMP Configuration File Change . To retrieve multiple variables with a single command, snmpbulkwalk is a tool that allows you to run all the variables under a system: $ snmpbulkwalk -v2c -Os -c public zeus system. Configuring the OS/400 Boot Loader, 30.6.4. The activation of a SNMP configuration on switch, router and firewall equipment is intended to make metrology. If you want to monitor multiple devices with Net-SNMP, you must install Net-SNMP and create the snmpd.conf file on each device to be monitored, Verifying and Installing Net-SNMP using free RPM Packages, Starting snmpd and testing connectivity to Net-SNMP, To view a pop-out list of menu options, click the menu icon(, To view a page containing all of the menu options, click the Advanced menu icon (, System name, operating system, operating system version, and uptime, Network interface details, including name, speed, and MAC address. Mail Access Protocols", Expand section "19.2. Top-level Files within the proc File System. Mail Transport Agents", Collapse section "19.3. The first two versions (1 and 2c) provide for simple authentication using a, For example, the following line grants the user, Expand section "I. Information Technology blogger, technology enthusiast, AWS, VMware vSphere virtualization, Windows, Linux Servers, Cisco UCS, iPhone photographer. net-snmp-utils i386 1:5.3.2.2-17.el5_8.1 updates 191 k If you are using a different Linux distribution, here are the instructions on how to install and configure Net-SNMP. 3. It is actively developed, with multiple commits every month for many years. Static Routes and the Default Gateway, 11.5. You must first restart the snmpd agent. To install net-snmp on Ubuntu, open the terminal and enter: sudo apt-get install net-snmp This will install the net- snmp package and all dependencies. Configuring a System to Authenticate Using OpenLDAP, 20.1.5.1. Connecting to a Samba Share", Expand section "21.1.4. Once the feature/component is added, open your services.msc. Registering the System and Managing Subscriptions", Expand section "7. Reverting and Repeating Transactions, 8.4. NOTE: Net-SNMP is highly customizable, and SL1 can fully take advantage of these customizations. Overview of OpenLDAP Client Utilities, 20.1.2.3. Additional Resources", Collapse section "19.6. Automatic Bug Reporting Tool (ABRT)", Expand section "28.3. How to enable SNMP on Mac OS 1. The directive rocommunity or rwcommunity in the snmpd.conf file declare this string: Whilecommunity is the used string, source is an IP address or subnet, and OID is an SNMP tree to provide access to. This can be useful in a number of scenarios, such as when you need to monitor server performance or ensure that the server is up and running. Preserving Configuration File Changes, 8.1.4. yourpassphraseofchoice Viewing Block Devices and File Systems", Expand section "24.5. Running the Crond Service", Expand section "27.1.3. This is for running snmpd on a host and allowing it to be queried. Date/Time Properties Tool", Collapse section "2.1. Testing SNMP service 6. $ snmpbulkget -v2c -Cn1 -Cr5 -Os -c public zeus system ifTable. The most recent standard is SNMPv3. Additional Resources", Collapse section "E. The proc File System", Expand section "E.1. Managing Users via Command-Line Tools, 3.4.6. Network Configuration Files", Expand section "11.2. For a refresher on editing files with vim see: New User Tutorial: Overview of the Vim Text Editor. In this article, we will explore how to install Files in the /etc/sysconfig/ Directory", Collapse section "D.1. The read-only user is placed in the traditional /etc/snmp/snmpd.conf file and the key is stored in /var/lib/net-snmp/snmpd.conf. Starting and Stopping the Cron Service, 27.1.6. SNMPv2-MIB::sysORUpTime.1 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.2 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.3 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.4 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.5 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.6 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.7 = Timeticks: (0) 0:00:00.00, SNMPv2-MIB::sysORUpTime.8 = Timeticks: (0) 0:00:00.00. Basic System Configuration", Collapse section "I. Enabling and Disabling a Service, 13.1.1. Procmail Recipes", Collapse section "19.5. Configuring Authentication from the Command Line", Collapse section "13.1.4. The Structure of the Configuration, C.6. OProfile Support for Java", Collapse section "29.8. Using sadump on Fujitsu PRIMEQUEST systems", Expand section "34. Basic System Configuration", Expand section "1. Configuring the Internal Backup Method, 34.2.1.2. It provides a wide range of tools that enable network administrators to monitor and manage their systems more effectively. Selecting the Identity Store for Authentication", Expand section "13.1.3. Introduction to PTP", Collapse section "23.1. Loading a Customized Module - Temporary Changes, 31.6.2. Here is an example of using snmpwalk command : snmpwalk v2c c Vdtg7hKk @ip .1.3.6.1.4.1.2636.3.1.13.1.7, iso.3.6.1.4.1.2636.3.1.13.1.7.9.1.0.0 = Gauge32: 40, "Jaguar Network est le leader de la data et de la transformation numrique des Grands comptes la TPE/PME". A name for the IBM BladeCenter SNMP device connected to the cluster. Enter a SNMPv3 user name to create: We definitely do not recommend using it when it can be avoided. Otherwise, these fields are grayed out. Distributing and Trusting SSH CA Public Keys, 14.3.5.1. Enter authentication pass-phrase: Configuring Services: OpenSSH and Cached Keys, 13.2.10. Most devices with enabled SNMP require the same configuration (identical SNMP version and community string). Configuring Static Routes in ifcfg files", Expand section "V. Infrastructure Services", Collapse section "V. Infrastructure Services", Expand section "12. Now that you have created the new snmpd.conf file for SNMPv3 on your Linux system, you can start the snmpd service (agent) and test that the new file is working. Configuring 802.1X Security", Collapse section "11. NOTE: This snmpd.conf file does not include encrypting SNMP access to the Linux client. The root log-in credentials for your computer are added to your SSH username and password when you sign in to your server. Monitoring Performance with Net-SNMP", Collapse section "24.6. Using the Command-Line Interface", Collapse section "28.3. OP5 Monitor - How to configure SELinux enforcing mode. Instead, a ~/.snmp/snmp.conf file containing the passwords should be setup so that queries can be made without typing the credentials. Today we will look SNMP in Linux operating systems. Creating SSH CA Certificate Signing Keys, 14.3.4. Additional Resources", Expand section "15.3. To enable access to the OID tree, the SNMPv3-specific users, with specific permission, security level, authentication, and privacy passphrases, must be created. SNMPv2-MIB::sysUpTime.0 = Timeticks: (586978184) 67 days, 22:29:41.84. SNMP configuration is indeed not the hardest one out there. Configuring a System to Authenticate Using OpenLDAP", Collapse section "20.1.5. Create a new snmpd.conf file, replacing "logicmonitor" with the community string that you are using. up2date -v -i net-snmp-utils net-snmp, 3. Insert the following text into the new /etc/snmp/snmpd.conf. mib2c-update. And you should be able to find the following: The result should be an OK/WARNING/CRITICAL/UNKNOWN check result with the output of the load average. Click on the Resource tab and choose which counters to monitor. A Linux SNMP server is a server that uses the Simple Network Management Protocol to allow networked devices to be monitored and controlled. > Package net-snmp-utils.i386 1:5.3.2.2-17.el5_8.1 set to be updated Setting Local Authentication Parameters, 13.1.3.3. Using the Command-Line Interface", Collapse section "28.4. It is a shared secret that is passed in clear text or hashed over the network, in a plainly unsafe way. Introduction to LDAP", Expand section "20.1.2. Managing Groups via the User Manager Application, 3.4. Script to merge custom code into updated mib2c code [email protected]:~# mib2c-update --help Starting regneration of ipAddressTable using mib2c.mfd.conf . Editing the Configuration Files", Expand section "18.1.6. Managing Log Files in a Graphical Environment", Expand section "27. Adding a Broadcast or Multicast Server Address, 22.16.6. Adding an LPD/LPR Host or Printer, 21.3.8. /etc/sysconfig/kernel", Expand section "D.3. Install this from the snmpd package: % apt-get install snmpd. It is implemented in the snmpset tool. Configuring a System to Authenticate Using OpenLDAP", Expand section "20.1.6. Adding a Broadcast Client Address, 22.16.8. The following is a working example of a snmpd.conf file for SNMPv3. To do this: The Linux RPMfor net-snmp includes the snmpd (Net-SNMP agent) binary as follows: NOTE: You should configure the snmpd.conf file before you start the snmpd daemon. Back up the original snmpd.conf file 3. System Monitoring Tools", Expand section "24.1. The xorg.conf File", Collapse section "C.3.3. Running Transaction Test Opening and Updating Support Cases Using Interactive Mode, 7.6. NOTE: Most Linux distributions will require the same installation and configuration as described in this section. Test your SNMP configuration with snmpwalk All rights reserved. Dating back to 1992, net-snmp is available for all major Linux distributions. Checking Network Access for Incoming NTP Using the Command Line, 22.16.1. Files in the /etc/sysconfig/ Directory, D.1.10.1. On Ubuntu and other Debian-based distributions, the tools are called snmp and the daemon snmpd. The instructions below will walk you through configuring the net-snmp agent for use on a MIPS-based embedded system. In this article, you will learn how to install and configure SNMPv3 on a local host usingDebian 10 Buster. DNS Security Extensions (DNSSEC), 17.2.5.5. Viewing and Managing Log Files", Expand section "25.1. Creating Domains: Active Directory, 13.2.14. These are the basics needed to start monitoring right away via SNMPv2: Open the snmpd.conf file in a text editor. The support for SNMP in many popular Linux distributions makes it simple and convenient to obtain information about your machines. Using the Red Hat Support Tool in Interactive Shell Mode, 7.4. Luckily, the net-snmp package comes with a command helper, net-snmp-create-v3-user, to configure the user under which the SNMP Linux server will run. With iptables, open it with: $ iptables -A INPUT -s <ip addr> -p udp -m udp --dport 161 -j ACCEPT Depending on the power of your computer, it could take anywhere between 2 and 4 minutes. SNMP Configuration File. # the "system" mib group in the mibII tree. This article provides an overview of the installation and configuration of Net-SNMP on Linux distributions such as Debian and Red Hat. Configuring the Hardware Clock Update, 23.2.1. Switching Configuration Types In Mid-file You will need to change these settings to match your local environment. In the console tree, expand Services and Applications, and then click Services. Engage with our Red Hat Product Security team, access security updates, and ensure your environments are not exposed to any known security vulnerabilities. Additional Resources", Collapse section "22.19. Additional Resources", Expand section "21. Run your schedule and you'll see the resources under the Resources tab on the left. To do this: snmpwalk -v 3 -u linuser -l authPriv -a SHA -A linuserpass -x DES -X linprivpass localhost system, DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (327207) 0:54:32.07, SNMPv2-MIB::sysName.0 = STRING: ps-centos-lnx. Accessing Graphical Applications Remotely, D.1. Downloading Packages: In my snmptrapd configuration, I am calling a very basic shell script just to identify if the trap was received: [root@centos-Main snmp]# cat /etc/snmp/snmptrapd.conf authCommunity log,execute,net public traphandle default /etc/snmp/mydummyhandler.sh TRAPs are generally sent by SNMP agents to signal abnormal conditions to a management station (in our case, a Linux server). Viewing Block Devices and File Systems, 24.4.7. Running the Net-SNMP Daemon", Expand section "24.6.3. Before you start to configure SNMP on Linux, open its port on the firewall. Disabling Console Program Access for Non-root Users, 5.2. Common Multi-Processing Module Directives, 18.1.8.1. SWITCHING CONFIGURATION TYPES IN MID-FILE The purpose of installing SNMP (Simple Network Management Protocol) is to monitor host resources like CPU, Memory, Network and Disk Utilization etc. Running an OpenLDAP Server", Collapse section "20.1.4. CTRL + SPACE for auto-complete. Enter one of the following at the prompt: Ensure that the output of this command includes each RPM listed above. The file should be located in /etc/snmp/snmpd.conf: # - created by the snmpconf configuration program, ##############################################################, # This section defines some of the information reported in. We will use UCD SNMP MIB since it contains the most system performance data On the Linux machine it's located in. Configuring Centralized Crash Collection, 28.5.1. The package is usually composed of two separate components: the tools to utilize the protocol, and the daemon to install it on a Linux host and to configure and monitor it. How to configure Zabbix Linux Agent with SNMP protocol? Most of Linux distributions rely on net-snmp. Static Routes Using the IP Command Arguments Format, 11.5.2. Add a Basic Configuration for SNMP. Simple network management protocol named SNMP is designed for getting info and setting configuration in its entities. Unfortunately, neither is up to modern standards and SNMP is not a choice for a modern organization that wants to monitor hosts and devices in a secure, private, and efficient setting. Managing Groups via Command-Line Tools", Collapse section "3.5. Reference: SNMPv3 With this Guide, you can Monitor: Status CPU Memory Topology Interface Status/Utilization Asset Inventory Viewing System Processes", Collapse section "24.1. Environment NPM 12.5;SAM 6.9;NPM 2019.4;SAM 2019.4;NPM 2020.2;SAM 2020.2 Cause Resolution 1. Seeding Users into the SSSD Cache During Kickstart, 14.1.4. Basic Postfix Configuration", Collapse section "19.3.1.2. Enter the IP address of the host receiver or SNMP manager: Configuring Domains: Active Directory as an LDAP Provider (Alternative), 13.2.15. A Reverse Name Resolution Zone File, 17.2.3.3. Practical and Common Examples of RPM Usage, C.2. As explained above, SNMP version 1 has limitations both in terms of performance and in terms of the data it can deliver that makes it unsuitable for monitoring.It's also (usually) pre-configured with the default community of public for readonly access. # dpkg-reconfigure tzdata. snmp config serviceInfo set city cityString contact contactString country countryString zip zipString description descriptionString phone phoneString. OP5 Monitor - Disable configuration changes on a Monitor node, OP5 Monitor - How to export objects such as host and services to a CSV file, OP5 Monitor - How to find backups of previous configuration saves by Nachos, OP5 Monitor- Modifying Apache response headers for external widgets, OP5 Monitor - Re-enabling indexes for tables in MySQL.

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