The company s network is not a problem now, but the company s network is unstable?

You are likely to have an ARP virus attack on the intranet, or other attacks that cause you to drop the connection, this is not something that can be solved by changing the router, sometimes the virus attack can kill the router, and you have to change the router and change the immune wall router! I changed to the immune wall router, and I didn't need to connect to any network management switch, just use a fool switch. The immunity wall can manage each NIC and block virus attacks from the NIC surface.

My network is much better after using the immunity wall! You can really give it a try.

The double binding is still very useful for the original ARP attack, but when faced with the current second-generation ARP, it becomes no way, the current ARP attack will first delete the binding you made, and then destroy the ARP cache table to achieve the purpose of the attack, we know that the attack is launched by each computer, so the first thing to do to stop the attack is to manage each computer, so that each computer can not send fake data packets only allow the correct data packets to be sent, and check before each computer sends dataIf you want to check, you need to manage each computer in the form of a network card, read the MAC from the network card, not from the system, so that the address read is real, and each computer is bound in a guarded manner.

The reasons for the instability of the company's network are hardware problems and computer configuration.

problems, Trojan virus issues, NIC failure issues, server issues, and loops on the network.

problems, etc. 1.Hardware issues.

If the computer has an aging network cable or a faulty router or cat, the network will be unstable, and you can replace these devices or contact your local broadband operator to solve the problem.

2.Computer configuration.

If the computer configuration is too low or you use this very old computer configuration, you may also have a network speed.

If this is the case, it is recommended to change the computer configuration.

3.Trojan viruses.

Trojan viruses will disguise themselves as plug-ins for computer IE, which will seriously affect the network speed, and it is necessary to upgrade the antivirus software to the highest level, and then carry out a comprehensive inspection and killing of the computer to effectively solve this problem.

4.The NIC is faulty.

The network card we use is generally a PCI network card or an onboard network card, and the quality must be better when choosing the right one, otherwise it may cause poor Internet quality. Then plug the NIC socket back in.

5.Problems with the server.

If the service operator's network is unstable, then it is useless to set it up. So make sure the server is stable first.

6.There are loops on the network.

The presence of loops on the network is also one of the reasons for the slow network speed. Because when some more complex networks are used on the network, there are more nodes, which will inadvertently cause loops.

There are several ways that your company's network is unstable and there are always dropouts that can lead to this.

1.External line problems, unstable external lines and total network disconnection.

2.Hardware problems, there is a problem with the router, resulting in irregular crashes and disconnections.

3.There is an intranet attack, and the protocol attack on the intranet causes the network to be disconnected or unstable. Moreover, now that enterprise network intranet attacks have the greatest potential to cause network instability and disconnection, the following is an analysis of how to solve these problems.

Solution. 1.To check whether the external line is normal, you can use the ping value method to test whether the external line is unblocked.

2.Hardware issues. It is generally caused by the aging of the hardware, and it is recommended to replace the device with a new one.

3.Intranet attack problem, intranet attack is actually caused by the underlying protocol vulnerability of Ethernet, if you want to solve it, some traditional 360 guard, ARP firewall, antivirus software I have tried all but no. I suggest you try the immune network solution, my previous intranet attack problems were solved through the immune network.

This should be replaced with a relatively large optical fiber, so that the router will be relatively stable, after all, the company is relatively large. In other words, there are many people who use the network, so it is necessary to choose a large optical fiber, so that it will be stable.

Routing Setup Problems (DHCP) are usually caused by conflicts, and you need to change the router to Level 2 or change the optical modem to a bridge.

In places where there are many computers on the Internet, the router automatically obtains an IP address, which will lead to IP address conflicts.

Check the IP address and manually modify the conflict.

Generally, it is the reason for the router, the phenomenon of stuck, or the reason for the external network, find your network management to react. These questions cannot be finished in one sentence, so it is recommended to find a network management system to check them

At present, there are ...... protocol viruses in the intranet, such as ARP spoofing, skulls, CAM attacks, IP spoofing, fake IP, fake MAC, IP fragmentation, DDoS attacks, oversized ping packets, malformed data, and excessive packet frequencyA series of intranet attacks can cause intranet disconnection, stuckness, and slowness. Even attacks like ARP are not easy to detect, and antivirus software can't solve them, and they can't do it. This is also the main reason why the intranet disconnection cannot be solved after the system is reinstalled.

These intranet attacks are prevalent in the network. There is no good way to get rid of these problems directly.

At present, you can completely solve the problem of immune wall technology, and deploy immune network solutions through immune wall technology. Immunity network solution, you don't need to make major changes to your network, you can use the immune wall to set up a policy, do not install a driver, do not let the Internet, and intercept it when it is installed. It can directly intercept the virus attack sent by each computer from the network card, carry out unified management, there is only one network administrator, and it can also monitor the Internet access status of the entire intranet computer, and accurately locate and alarm if there is an abnormality.

Some endpoints in the intranet have been infected with the ARP virus. ARP attacks are divided into two types: one is to deceive the intranet client, that is, the host in the ARP virus constantly sends the wrong gateway MAC-IP correspondence in the LAN with a high frequency (sending broadcasts to other hosts in the LAN saying that it is the gateway), and as a result, other hosts in the LAN send data packets to the poisoned host, which eventually causes the data to be sent out and dropped; The other is to deceive the gateway, that is, the infected machine continuously sends the wrong MAC-IP correspondence of the intranet client to the gateway at a high frequency to change the ARP table of the gateway (that is, to tell the gateway that the MAC corresponding IP address of the client below is its own), causing the data sent from the private network to the public network to be returned to the poisoned host when it is returned, and finally causing the intranet client to be unable to accept the data returned by the public network and display the disconnection.

At present, the most complete solution to the ARP problem on the market is the Xinxiang Immune Wall Router, which has a unique immune network solution that can completely solve the ARP attack problem. Xinxiang's immune wall router has the function of innate immunity, which fuses the NAT table and the ARP table through the modification of the protocol, and directly queries the NAT table when there is an ARP request, making the deception against the gateway ARP table completely ineffective. The terminal is equipped with an immune network card driver, which can directly read the MAC address burned on the network card to ensure that it is correct.

Filter malicious ARP packets as well as other common flood attacks to keep your network open.

Landlord,There are a lot of fake MACs that capture packets, there must be someone who has attack software to attack your router,Like the kind of SYN attack that appeared in the Internet café before,It is to send a lot of fake MAC attack routers,The router is paralyzed,At present, the popular immune network technology solution on the market is proposed for the attack on the intranet,It can directly intercept various ARP attacks on the network card,DDoS,SYN attack,Once the abnormality is found,Directly block the attack host,Return you a green network。

Install the ARP firewall. Keep track of ARP. Your intranet is poisoned. arp。Just do the binding. Then every computer is antivirus. It can be cleared basically.

LZ In this way, you can understand the immune wall, now many places are using the immune wall, and there will be a lot of fake MAC in the ARP deception of the intranet, I suspect that you are also in the ARP virus, and the immune wall can be completely solved. And it can be accurately located that the intranet is the false information sent by the machine. This is the only device that can be accurate now.

LZ knows a lot about this immune wall.

Grab the packet and see if these attacks come from the outside or from the inside. It would be nice to have a firewall, formulate a corresponding security policy, and the problem will be solved.

It is recommended to check whether the wireless network is well connected, and then disconnect and reconnect.

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First understand your company's bandwidth access situation, and then check your company's usual traffic situation, if your company's employees use software such as P2P terminator, then you have to do IP-MAC binding. Case-by-case analysis.

It is estimated that the IP address is bound to a MAC address. If you can access the Internet on your laptop at home, you can use the router to set your computer's IP to try, if this doesn't work, clone the MAC address in the wireless router to your computer's MAC address.

If DHCP is enabled for the router, the computer automatically obtains the IP address).

To clone the MAC address of the router into the MAC address of the computer, you need to find the physical address of the network card (that is, the MAC address) of the book.

1) Find the physical address of your NIC.

Enter the msdos mode of the system, issue the ipconfig all command, and you can find the MAC address of the computer network card. For example: 00-50-8d-d1-71-a7. Write it down.

2) Set the route (the wireless router is set to the machine IP, and clone is the machine MAC address, remember to leave the dormitory, be sure to go offline, otherwise the laptop will not be used when you take it home, and the IP address conflicts).

1) Restore the router to factory settings.

2) Normal routing dial-up settings.

3) Click the Network Parameters button in the left window of the route configuration page, and select the MAC address clone button. The window of "MAC address cloning" appears. In the window of "MAC address of the current management PC", fill in the "Valid MAC address" found above.

Click the "MAC Address Clone" button, and the MAC address will be filled in the "MAC Address" window. Save the settings. Exit the route settings, restart the route, and you should be fine.