In today's era of rampant hacking, the router firewall function selected by colleges and universities can no longer be well protected from network hackers. Choosing a better dedicated hardware firewall will become an important means for major universities to defend against network hackers. There are many kinds of hardware firewalls on the market at present, and their functions are different. The hardware firewall suitable for campus network must have the following characteristics.
The large number of user connections is a necessary feature of campus hardware firewalls. At present, the number of colleges and universities has increased dramatically. In these colleges, although not one computer per person, the number of computers is also considerable. In addition to the various computer rooms of the school, the network of colleges and universities is very large. Therefore, a hardware firewall needs to drive a large number of computers to go online. Now there are many hardware firewalls in the market with unlimited number of people, which fundamentally solves this problem.
The hardware firewall suitable for campus should have the ability to connect to 100M network and Gigabit network. Because the hardware firewall is located at the next layer of the router, the current campus network generally uses a network of 100 megabytes or more than gigabit, so we need to connect a high-bandwidth hardware firewall.
The hardware firewall suitable for the campus must have strong anti-hacking capabilities and intrusion monitoring capabilities, which is also a basic feature of hardware firewalls. At present, the main means of network hacking attacks are DOS (DDOS) attacks, IP address spoofing, Trojan horses, password attack, mail fraud, etc. These attacks come not only from the external network, but also from the internal network. The hardware firewall suitable for campus must have the ability to prevent these external and internal network attacks. The hardware firewall is composed of software and hardware, and the software in it provides an upgrade function, which can help us to repair the vulnerabilities that are constantly found.
Due to the access to some illegal websites inside the campus network, in order to prohibit access to illegal websites, the hardware firewall must not only have the function of preventing illegal access to the internal network, but also have the function of monitoring the network, because now some bad websites have new Only by monitoring, can the illegal websites be blocked according to relevant information.
The hardware firewall suitable for the campus network should be easy for administrators to manage. After all, the school does not hire professional administrators to manage the hardware firewall. This kind of easy management is reflected in the software matched with the hardware firewall. At present, there are mainly hardware firewalls with professional software and hardware firewalls with Linux or Unix operating systems on the market. Users can choose according to their actual situation.
For any product purchase, we will require a high cost performance, so the campus hardware firewall also needs a high performance and a relatively suitable price to attract users to buy.
The above is the basic feature of the campus network hardware firewall. In view of the uneven quality of hardware firewalls on the market and the difficulty for campus users to purchase, our IT World Network Channel introduces several hardware firewalls to campus users for reference.
Cisco PIX-515E-R-BUN (choice of small campus network)
The Cisco PIX-515E-R-BUN firewall, located in the low-end market, has a high cost performance. This hardware firewall adopts Intel Celeron processor, the main frequency is 433MHZ, has 32MB memory and 16MB flash memory, the maximum number of concurrent connections is 130,000, 170Mpps data throughput, 100MB of security filtering bandwidth and no user number limit This hardware firewall is suitable for small campus networks.
The core of this hardware firewall system is a protection mechanism based on adaptive security algorithm (ASA), which can prevent common denial of service (DOS) attacks. Cisco PIX-515E-R-BUN provides support for VPN, which allows the secure transmission of data within the campus network. Cisco PIX-515E-R-BUN provides an intrusion monitoring function, which can provide corresponding strategies to prevent network hacker attacks when hackers invade.
This hardware firewall has a failover bundling function. If there is a backup firewall in the network, this function will allow the failed Cisco PIX-515E-R-BUN to quickly switch to another backup firewall to prevent network hackers from attacking. .
The Cisco PIX-515E-R-BUN firewall uses the Cisco PIX operating system, which greatly improves the security performance of this hardware firewall, and can be updated online to fix future vulnerabilities.
Comment: The overall performance of the Cisco PIX-515E-R-BUN is still satisfactory if it is applied in a small campus network. In addition, with the ASA protection mechanism and failover bundling function, this hardware firewall adds a lot of color.
NetEase ES903 (Small and medium campus network application)
NetEase ES903 is a firewall designed with ASIC hardware. It has a data throughput of 200Mpps and a security filtering bandwidth of 70MB. The number of concurrent connections has reached 500,000. The overall performance is satisfactory, suitable for small and medium-sized campus networks .
This hardware firewall has WEB content filtering function. The campus network administrator can add the address of the website to be blocked in the free-blocking list. By setting a legal URL in the WEB manager, the internal campus users can automatically access the illegal website. Connect to the legal address set in the WEB manager. NetEase ES903 provides an intrusion detection function. When a hacker attacks the campus network, the firewall will record the attack information in the system log and warn the hacker. The user authentication function improves the security of the campus network. This hardware firewall provides a more comprehensive defense function, which can prevent attacks including DoS, port scanning, buffer overflow, brute force attacks, Trojan horses and so on. Like other hardware firewalls, NetEase ES903 provides flow control, VPN, IP address and MAC address binding and other functions, so that campus network users have a more secure network environment.
NetEase ES903 is equipped with its dedicated ESOS operating system, both in terms of performance and function, this hardware firewall has been greatly exerted.
Comment: The function of this hardware firewall is very powerful, plus the use of ASIC hardware design, a great improvement in performance. However, the security filtering bandwidth of 70MB is lower than the standard level.
Cisco PIX-525-UR-GE-BUN (small and medium-sized campus network selection)
Cisco PIX-525-UR-GE-BUN is a firewall for enterprises, but also meets some small and medium-sized campus networks. This hardware firewall adopts IntelPentiumIII processor, the main frequency reaches 600MHZ, and is equipped with 256MB random memory and 16MB flash memory. It supports a maximum of 280,000 concurrent connections, has a network data throughput of 370Mpps and a security filtering bandwidth of 100MB, and no users Limit the number, the overall performance is relatively strong, very suitable for small and medium campus networks.
This hardware firewall provides an adaptive security algorithm (ASA) for the static connection firewall function, which can implement packet filtering, and can track the source and destination addresses, TCP serial numbers, port numbers and additional data attached to each data packet during data transmission. TCP flag, so as to ensure that the campus internal network will not be attacked by illegal users. Cisco PIX-525-UR-GE-BUN supports the VPN function, and can encrypt the data transmitted on the campus network to prevent other users from stealing it. Cisco PIX-525-UR-GE-BUN provides a network address translation (NAT) function, which can save IP address resources, and can hide IP addresses to prevent external network access, which provides a powerful guarantee for campus internal network security. Cisco PIX-525-UR-GE-BUN has the function of preventing denial of server attacks and preventing computers inside the campus network from being attacked by hackers.
The JavaApplet filtering function can terminate the potential dangers of the internal users of the campus network using Java. The mail protection function and URL filtering function make campus network users basically immune to mail attacks and unable to access illegal sites.
The operation of Cisco PIX-525-UR-GE-BUN is also very simple. It only needs 6 commands to complete the basic security settings, which is very convenient for the campus network.
Comment: The performance of this hardware firewall is quite satisfactory. Cisco's ASA algorithm makes Cisco PIX-525-UR-GE-BUN for campus
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