What is Hashicorp Consul? HashiCorp introduced Consul in April 2014. HashiCorp Consul is an open-source tool that solves complexities by offering service discovery, health checks, load balancing, a service graph, mutual TLS identity enforcement, and a configuration key-value store. These features make Consul an perfect control plane for a service mesh. In simple, Consul is a…
The SNMP protocol is used by network management systems to communicate with network elements.For this to work, the network element must be equipped with an SNMP agent. Most professional-grade network hardware comes with an SNMP agent built in. These agents must be enabled and configured to communicate with the network management system. Operating systems, such…
What is Social Bookmarking :- An online service which allows users to add, annotate, edit, and share bookmarks of web documents is called Social bookmarking. Since 1996 many online bookmark management services have launched . Such as Delicious, founded in 2003 and popularized the terms “social bookmarking” and tagging .Tagging is a significant feature of social…
In this tutorials im going to describe how & where to build and promote on your business on Facebook groups with your target audience. Facebook is most Social networking sites everyday 950 million users spend hours on Facebook each day So Facebook is easy to promote your business. Facebook groups beneficial for any business its…
Using the OSI model, which layer has the responsibility of making sure that the packet gets where it is supposed to go? What is the subnet mask, network address and broadcast address for the following address: 123.65.47.62/22? What command is used to show all open ports and/or socket connections on a machine? What is NAT?…
What is localhost and why would ping localhost fail? What is the similarity between “ping” & “traceroute” ? How is traceroute able to find the hops. What is the command used to show all open ports and/or socket connections on a machine? Is 300.168.0.123 a valid IPv4 address? Which IP ranges/subnets are “private” or “non-routable” (RFC 1918)?…
Say I open a web browser and enter an address. I hit enter. Describe how the connection the works in as much detail as possible. Trying to hear that they understand: DNS Network routing Load Balancing Ports on server Service that is serving port What’s a PTR in DNS? What’s a MX record in DNS?…
What is IPv6 ? Why should we care? How does ping work ? What about traceroute ? I type http://www.yahoo.com in my browser’s URL bar and I press enter. What happens ? (discuss at every OSI layer – Physical, data link, network, transport, session, presentation, application) DNS & anycast, IP, UDP, routing, BGP, TCP, HTTP, transparent proxy…
Network File System (NFS) is a network file system protocol originally developed by Sun Microsystems in 1984, allowing a user on a client computer to access files over a network in a manner similar to how local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC)…
scmuser created the topic: Dead drop Symptom: A PC, phone, access point or printer is connected to the wall jack and the connection is not activated. The switch port does not show a link light, nor does the network adapter. sgadmin replied the topic: Re:Dead drop Cause: Dead drops are commonly simple problems that occur…
scmuser created the topic: Problem 2 – Can’t get an IP address Symptom: The network appears down or inoperable. The operating system may alert that an address was not received from the DHCP server. After checking the network adapter status, no address may be configured. sgadmin replied the topic: Re:Problem 2 – Can’t get an…
scmuser created the topic: Can’t connect to the application server Symptom: The application the user is trying to open may alert that it cannot connect to the application server. This can be the case when using e-mail applications or CRM Applications. The common complaint into the help desk is that the network is down, even…
scmuser created the topic: Incorrect VLAN assignment Symptom: When installing new services on the network such as wireless or VoIP, VLANs are typically used to isolate this traffic from other users. This requires each switch port supporting these services to be configured for the proper VLAN. If this is not done properly, the service may…
scmuser created the topic: Duplex mismatch Symptom: With a duplex mismatch, the connection will work, just poorly. The link lights will become active on both the switch and network adapter. Network performance will suffer greatly, with throughput dropping to 100Kbps or lower. sgadmin replied the topic: Re:Duplex mismatch Cause: One side of the connection is…
scmuser created the topic: Slow application performance Symptom: The application appears sluggish. It may freeze on a certain screen or halt while accessing data. Often, the network is blamed for these issues. sgadmin replied the topic: Re:Slow application performance Cause: Exonerating the network in application performance problems can assist server maintenance personnel to take out…
scmuser created the topic: Printing problems Symptom: Printing does not consistently work on the network. A printer may appear available, but print jobs that are sent to it are not completed. sgadmin replied the topic: Re:Printing problems Cause: Determine if only one user is experiencing this problem or if several people have the same issue….
scmuser created the topic: Poor or bad cable Symptom: If the client PC is able to link to the network, performance may be poor. The PC may not be able to connect at all. sgadmin replied the topic: Re:Poor or bad cable Cause: In networks today, Gigabit to the desktop is common. Gigabit requires four…
scmuser created the topic: DNS problems Symptom: The user cannot access the internet or key applications. The network appears to be down. sgadmin replied the topic: Re:DNS problems Cause: Domain Name Services may be to blame. The client PC cannot resolve the name of the server with the IP address of that server, so it…
scmuser created the topic: Wireless client can’t connect Symptom: The client can detect the wireless access point, but it cannot connect to the wireless network. sgadmin replied the topic: Re:Wireless client can’t connect Cause: Security credentials, wireless channel interference, and dead spots can cause this problem. Since wireless is invisible, it can be very difficult…
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scmuser created the topic: The VPN agent is not responding Hi, While using CISCO ANYCONNECT VPN client, i get following message The VPN agent is not responding.Please contact your IT administrator for assistance. i find cisco services is running fine. I un-installed and installed many times but same issues. plz suggest what need to be…
Starting Nagios Core Init Script: The easiest way to start the Nagios Core daemon is by using the init script like so: /etc/rc.d/init.d/nagios start Manually: You can start the Nagios daemon manually with the -d command line option like so: /usr/local/nagios/bin/nagios -d /usr/local/nagios/etc/nagios.cfg Restarting Nagios Core Restarting/reloading is nececessary when you modify your configuration files…
How to start and stop Naxios XI Server? How to stop Naxios XI Server? service nagiosxi stop service npcd stop service ndo2db stop service nagios stop service postgresql stop service mysqld stop service httpd stop How to start Naxios XI Server? service httpd start service mysqld start service postgresql start service nagios start service ndo2db…
Step by step procedures to Install Nagios agent in Linux > cd /tmp > mkdir software > cd software > yum install wget > wget https://assets.nagios.com/downloads/nagiosxi/agents/linux-nrpe-agent.tar.gz > tar -zxvf linux-nrpe-agent.tar.gz > cd linux-nrpe-agent > ./fullinstall Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog…
Step by step procedures to Install Nagios XI Server in Centos 7 #Update your centos os > yum install update > yum install wget # to install network utility e.g. ping. (Optional) > yum install net-tools > cd /tmp > mkdir software > cd /tmp/software # Download the Nagios latest package > wget https://assets.nagios.com/downloads/nagiosxi/5/xi-5.4.3.tar.gz >…
Install and Configure Nagios Server and Clients Download the Nagios Server Source copy from https://www.nagios.com/products/nagios-xi/ You can also use the direct download links as below; > wget https://assets.nagios.com/downloads/nagiosxi/5/xi-5.2.0.tar.gz Extract the xi-5.2.0.tar.gz using > tar -zxvf xi-5.2.0.tar.gz Run the following commands to install it. > ./fullinstall At the end of installation, you will get the url…