Tag: IP

Red Hat Linux is a Linux based operating program

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Microsoft trainingis necessary for one’s career development. Computers today are used in all the spheres of our lives. Every day we use computers for storing, analyzing and disseminating the information from the computer. A very important boon of the computer is the internet. Today, computer training starts from an age as early as six years. It has become a prerequisite that everyone knows how to use computers. One should know the basics of computers like emailing, surfing, uploading photos and other data online.

If you are a novice, then training can help you in every sphere. If you complete a course, you also get a certification of that program. You can learn Microsoft excel, word, power point etc. Microsoft trainingprovides excellent placements. You can learn various computer languages in various institutes. These computer institutes apart from providing that basic knowledge of computers make you adept at the various uses of computers. And since there are many software companies today in the market, these certification programmers can guarantee you a great job offer with good salary too. Microsoft traininghelps in doing the work faster. Microsoft can be used for many things. If you want to make a presentation, instead of manually doing it you can make it on power point. Red Hat Linux is a Linux based operating program. Linux helps a lot in one’s business. It was released in the year 1994. It also has released a graphic installer called anaconda which is very easy to use for the beginners in Linux programming. Red Hat Linux is now called Red Hat Enterprise Linux (RHEL). It was done for enterprise environment.

Also the Fedora project by the Fedora community released a version of Linux which free and can be used for home purposes. Red Hat Linux helps in web hosting. It has shipping projects with Apache. It helps in hosting of multiple sites simultaneously on a single machine using many IP addresses or only a single one. It is the most used programming based software on the internet. It is very reliable and it helps in enhancing the functionalities.

Linux Network Configuration And Troubleshooting Commands

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There are a number of network strategy or media are anxious to form computer network. computer burdened with Linux operating system can as brilliant be a division of network whether it is modest or huge network by its multi tasking and multi user natures. Preserve of system and network up and operation is a task of system network Administrators job.

ifconfig : if con fig command is developed to initialize an interface, assign IP address to interface and facilitate disable interface on command. Among this command you can view IP address and hardware and MAC address allot to the interface and also MTU size. if con fig with edge command only shows correct interface facts like IP address, MAC address etc. With an options will exhibit all accessible interface details if it is disable also.

Assigning IP Address and Gateway: Assigning an IP address and gateway to interface on the fly. The place will be separate in case of a system reboot.
Enable or Disable Specific Interface: To facilitate or disable specific Interface.

We utilize case command as follows.

Enable eth0

Setting MTU Size: By defaulting MTU size is 1500. We can place required MTU size with under command.

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Set Interface in immoral mode: Network interface only straight packet belongs to that exacting NIC. If you put frontier in corrupt mode it will establish all the packets. This is extremely functional to detain packet and examine later.

PING Command: PING command is the most favorable way to make sure connectivity between two nodes. It is local area network or extensive area network . Ping use ICMP Internet control communication protocol to chat to other devices. Ping host name of ip address using lower command.

ping 4.2.2.2

In Linux ping command preserve executing until you cut short. Ping with -c option exit after N number of demands. TRACER OUTE Command: Trace route is a network troubleshooting value which shows number of hops full to arrive at objective also determine packet traveling path. Under we are tracing method to global DNS server IP tackle and able to attain reason also show channel of that pack is traveling.

NET STAT Command: Net stat command exhibit relation info, routing table in order etc. Two displays routing table information use option as -r.

DIG Command : Dig query DNS related information like a record, CNAME, MX record etc. This command frequently uses to troubleshoot DNS related query.
NS LOOK UP Command : ns look up command also exploit to find out DNS related query. The following examples shows A record IP address of

tecmint.com.

nslookup www.tecmint.com

ROUTE Command : Route command as well explain and control IP steering table. Watch evasion routing table in Linux, method the following command
route

HOST Command : Host command to discover name to IP or IP to name in IPv4 or IPv6 and as fine query DNS events.

ARP Command: ARP is helpful to view add the inside of the kernels ARP tables. To see default table use the command as.

ETHTOOL Command: Eth tool is a stand-in of mii-tool. It is to thought setting the speed and duplex of your network interface card. Set duplex lastingly in /etc/sysconfig/network-scripts/ifcfg-eth0 with ETHTOOL_OPTS changeable.

IWCONFIG Command : IW con fig command in Linux is used to configure a wireless network interface. Recognize and set the basic Wi-Fi facts like SSID channel and encryption. Refer man page of iw con fig to classify additional.
HOST NAME Command : Host name is to know in a network. Execute host name command to observe the host name of your box. Set host name lastingly in /etc/sys config/network. Require to reboot box one time set a proper host name.

GUI tool system-con fig-network : Type system config net work in command prompt to configure net work setting and you will get nice graphical user interface (GUI) which can also utilize to configure IP address, gateway, DNS etc.

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Standalone Ip Nvr Linux

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Standalone Video Recorder

Standalone IP NVR Linux is a video recorder used for surveillance and other technologies. This technology uses IP cameras to record digitally, monitor and playback. It is manufactured the QNAP security professionals. The system comprises of up to eight IP cameras and 4 hard disks. Installing the gadget for surveillance is easy. It has been made in a very compelling way to enhance easy plug in; and therefore does not require any specialized or digital skill. The recorder also allows simultaneous recording of events.

Features of NVR Linux

The 5.0 Mega pixel Hi-Def IP cameras are dual stream and have a capturing rate of 30fps. They can be adjusted to reach a maximum of 16M and shoot at a distance of 25601920. Box IP cameras with a GV-NVR System Lite have a hard drive of 500 GB a POE plug in. Their system is ultra thin and has an NVR GeoVision included. The GeoVision Infrared IP cameras are water proof, have dual streams, allow on board recording, have 16 LED lights and an internal lens with a diameter of 3.6-9 mm.

Standalone Properties

Standalone IP NVR Linux recorders are easy and fast to install, stable, free from attacks and viral crashes caused due to the Linux embed and they have an open platform. They are designed for use in homes and medium sized businesses. The open platforms allow the recorder to support more cameras. In case of failure of the hard disk, the digital recorder continues to carry out its functions.

Advantages of Standalone Recorder

This monitoring device is very simple to install and it does not need special software to assist with the installation. After assembling the hardware, disks are inserted so that the recording is connected to the internet. Inter linking the recordings to the browser are because of the special web-based appliance. The user can then log in on the net and can locate the recording process on a particular application. It is very economical more so because its known to save on the time, money and energy. Standalone IP NVR Linux ensures that all data is safe and can never be lost. Its virus and crash free so you never have to worry about loosing any of the recorded data. The whole system is stable and reliable and users will have faith in it-they dont have to keep watch of its functions.

What Makes the Best NVR?

Recording is of very high quality and thanks to its D1, finding the target becomes an easy task. Camera images can be viewed on the computer screen. The images can be compared on different cameras later on. Tracing of targets therefore becomes much easier-although it may take a longer time to do this. This is because what one camera captures may have been missed by the other. To enhance quality tracking, one has to have other tools alongside the Standalone IP NVR Linux recorder. These tools will efficient detection of missing objects, camera occlusion, detection of motions, lose focus and detection of foreign objects within the recordings. Approximated price for one of these is 2,599.95 dollars.

How to Use an IP Dome Camera for Linux

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Installing an Internet Protocol (IP) Dome camera on a Linux PC can add an extra layer of security to your home or business premises by giving you the capacity to view camera feeds of your business or house while you are away. IP dome camera applications facilitate secured remote access to a camera feed distribution over the Internet so that the customer can be certain that that their home or business belongings are safe from criminals. Linux features a robust set of IP camera tools that make setting up an IP camera easy.

Using ZoneMinder IP dome camera for Linux

ZoneMinder is a Linux video camera security and a surveillance solution provider, ZoneMinder is aimed for use in single or multi-camera video security apps, including business or home CCTV, and burglary prevention; child, family member or home monitoring; including other domestic care scenarios for instance nanny cam installations. It offers support on capture, recording analysis, and examining of video data emerging from one or several video or network cameras connected to a Linux system.

InstallZoneMinder IP dome camera from the Linux repository and set it up for access from the web browser. Access the ZoneMinder interface by navigating to the Internet protocol address of your PC in a web browser. Choose the settings at the top right to adjust yourZoneMinder IP dome camera installation to suit your preference. Nearly every aspect of ZoneMinder IP Dome camera is customizable.

Allow online access from any PC by choosing the “FTP” tab in settings. Where from this dialog, you can spell out where IP dome camera video capture folders should be uploaded. It is from this point that you can gain access of your IP dome camera feed.

Save the settings entered and restart ZoneMinder for the modifications to take effect. You can restart ZoneMinder using the next terminal command: sudo /etc/init.d/zoneminder restart

Include your camera monitor(s) by choosing the “Add New Monitor” key from the ZoneMinder interface. Protect your FTP location (with password) either by modifying the security of the directory via your web hosting monitoring panel or by forming an .htaccess file which password protects the administrator and uploaded it.

Resists The Network Attack With The Linux System Firewall Function

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The hypothesized main engine service provider will possibly come under the hacker attack in the operation process, the common forms of defensive action will have SYN, DDOS and so on. Through replaces IP, searches the stand which attacks is possibly avoided attacks, but interrupt servicing’s time comparison is long. Acquires the hardware firewall compared with the thorough solution. However, the hardware firewall price is quite expensive. May consider that provides the firewall function using the Linux system itself to defend.

1. Resists SYN
The SYN attack is the principle which 3 times shakes hand using the TCP/IP agreement, transmits the massive establishment connection the network package, but is not practical establishes the connection, causes to attack finally server’s network formation to fully occupy, is unable by the normal user visit.
The Linux essence has provided the certain SYN related disposition, with order:
sysctl – a | grep syn
Sees:
net.ipv4.tcp_max_syn_backlog = 1024
net.ipv4.tcp_syncookies = 0
net.ipv4.tcp_synack_retries = 5
net.ipv4.tcp_syn_retries = 5

tcp_max_syn_backlog is the SYN formation’s length, tcp_syncookies is a switch, whether to open SYN the Cookie function, this function may prevent the part SYN attack. tcp_synack_retries and tcp_syn_retries define SYN to try the number of times again.

Increases the SYN queue size to be possible to hold the more waiting connections the network connections number, opens SYN the Cookie function to be possible to prevent the part SYN attack, reduces tries the number of times also to have certain effect again.

Adjusts the above establishment the method is:
Increases the SYN queue size to 2048:
sysctl – w net.ipv4.tcp_max_syn_backlog=2048
Opens SYN the COOKIE function:
sysctl – w net.ipv4.tcp_syncookies=1
Reduces tries the number of times again:
sysctl – w net.ipv4.tcp_synack_retries=3
sysctl – w net.ipv4.tcp_syn_retries=3

Restarts for the system moves when maintains the above disposition, may join the above order to the /etc/rc.d/rc.local document.

2. Resists DDOS
DDOS, distributional refuses to visit the attack, is refers to the hacker to organize from different origin many main engines, to common port, like 80,25 and so on transmission massive connections, but these client sides only establish the connection, is not the normal visit. Because the general Apache disposition accepts the connection number limitedly (usually is 256), these the vacation the visit will fully occupy Apache, the normal visit will be unable to carry on.

Linux provided has called ipchains the firewall tool, might shield from specific IP or the IP address section to the specific port’s connection. Uses ipchains to resist DDOS, is first through the netstat order discovery attack origin address, then orders with ipchains to block the attack. Discovered that blocks one.