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10 free enterprise-level security monitoring tools

collect MB of logs every day. 5. zabbix You can use zabbix to track network devices, services, servers, and applications for traditional Security Logging and analysis, as well as performance management and capacity planning. 6. firegen Analyze firewall logs of mainstream Firewall vendors, such as Cisco, zhanbo, SonicWall, FortiGate, and race gate, which can identify and interpret recorded events, inject more meaningful information into t

Introduction to broadband access network design standards

install and update network software on a large number of remote PCs.◆ In addition to Windows, Many operating systems lack VPN customer software, such as Linux, Mac, Solaris, and BSDI.◆ The remote PC used for confidentiality lacks security.◆ Brings new security breakthroughs. Hackers can conduct U-turn attacks on remote PCs to undermine the company's network security. In a U-turn attack, hackers obtained access to insecure pcs of Independent Online workers and connected them to the company's net

Wireless access technology works with VPN to solve security problems

set and apply, no additional server or hardware costs. The disadvantage of this method is that the additional load on the existing Server is increased. The load varies depending on the number of APS you provide and the number of customers who use these aps ). The server may fail to execute other tasks. If the same server also provides firewall functions, additional loads may prompt other servers or adopt different methods. The second method includes using a wireless ap that contains the built-i

Enhance wireless network security by combining VPN and Wireless AP

number of customers using these aps ). The server may fail to execute other tasks. If the same server also provides firewall functions, additional loads may prompt other servers or adopt different methods. The second method includes using a wireless ap that contains the built-in Virtual Private Network Gateway Service. Companies such as SonicWall, WatchGuard, and Colubris currently provide a single chassis solution. This solution integrates AP and vi

Firewall system fault Detection-(1) terminal emulation software securecrt 7.3.5 download and installation

 The principle of fault detection in firewall systemAs most computers use Windows systems, firewalls also have their own systems, usually Linux, and computers, firewalls, if there is a failure, can be divided into software failures and hardware failures, hardware failures are more obvious, easy to judge, and software failure because the firewall is usually no information display or display of the small amount, it is not easy to judge, this need through the terminal software, the use of dedicated

How WAN optimization technology mitigates network bottlenecks in data centers

connections, although this may make users who have been rejected unhappy. Rate limiting Technology ensures that applications or users can only use the limited maximum available bandwidth. Select an appropriate WAN optimization vendor WAN optimization equipment and software usually need to be deployed simultaneously at the sending and receiving ends. Well-known WAN optimization devices include Dell SonicWall WAN accelerators, Riverbed Steelhead, Cisco

How to choose the right firewall for small/medium/large application environments

. Because generally speaking, the smaller the office size, the fewer users, the lower the risk faced. As a result, simple packet-filtering firewalls are sufficient for small offices, such as those that are randomly brought by many DSL or cable routers. These include broadband routers from companies such as D-link, 3Com, Netgear and Linksys. In addition, WatchGuard Firebox Soho, Symantec Firewall 100, global technology company Gnat, NetScreen and SonicWALL

Security analysis: Where the real threat of internet telephony comes from

firm, said VoIP users must have a clear understanding of the IP infrastructure that this technology relies on. "Threats to IP networks, such as viruses, fall within the context of data security, but this threat also affects the quality and reliability of VoIP voice services." "In fact, compared to conventional data traffic, including VoIP voice, the various real-time traffic is more sensitive to network anomalies, the bottom line of VoIP security is the security of data network first." As Macho

How to choose antivirus software for enterprises

price may be slightly more expensive)When using the head method to buy the license, we should take into account the development trend of the enterprise. Some companies may meet the licensing limit in six months. Also carefully record how many systems have antivirus software installed, and modify the records as the enterprise workstation and server updates are replaced.10, a reasonable priceIf the license is less than 50 people, the annual license fee per head is about 30-45 dollars. If the comp

Architecture High-performance Web site tips (i)--understanding metrics to measure website performance

time of the data in the communication line.Transmission time = transmission distance/transmission speed(transmission speed is approximately 2x10^8m/s) Processing time: The time at which data is stored for forwarding in each router.Processing time is more difficult to calculate. Response time = (packet bits/bandwidth) + (transmission distance/transfer speed) + processing timeDownload speed = number of bytes/response time of dataWhat is throughput

A big contrast between go and Java garbage collection algorithms in the eyes of an expert

a garbage collector over the next decade, we turned to an algorithm that was decades old. Go's new garbage collector is a concurrent, tri-color, tagged scan collector, an idea that was first presented by Dijkstra in 1978. Compared to most enterprise-class garbage collectors today, this is a highly differentiated choice, and we think the algorithm is well suited to the properties of modern hardware and the latency requirements of modern software. After reading the above statement, you may

Talk about web acceleration

Web application, the essence is a variety of Web content from the Web site to reach the browser, presented to the user. The less time a user wants to get web content, the better. From the perspective of Web sites, there are two major metrics: throughput and concurrency, which need to be addressed when a large number of users are concurrently accessing the latency problem. Throughput refers to the number of

RedHat Performance Tuning

"high throughput" or "low latency" preset configuration. They should provide initial configuration for further applications. For example [Root @ bkjia ~] # Tuned-adm list-Balanced-Desktop-Latency-performance-Network-latency-Network-throughput-Powersave-Throughput-performance-Virtual-guest-Virtual-hostCurrent active profile:

Vswitch board bandwidth calculation

may be larger than 12 bytes in practice. Here I use the minimum value. Each frame requires a fixed overhead of 20 bytes. Now let's calculate the actual throughput of a single port of the switch: 148,809 × (64 + 8 + 12) × 8 ≈ 100 Mbps, through this formula, we can see that the actual data exchange volume accounts for 64/84 = 76%. The "line rate" data throughput of the switch port link is actually only 76 Mb

Java garbage collection mechanism

, are identical to the serial collector. The work process is as follows:Parnew is the preferred new generation collector for virtual machines in server mode, and in the Cenozoic, only the Parnew collector can work with the CMS collector in addition to the serial collector. Parallel scavenge collector, Parallel old collector The Parallel scavenge collector is a new generation collector and is also a parallel multi-threaded collector using the replication algorithm. It is different f

JVM Learning Notes

: The target of the "throughput priority collector" is to achieve a controllable throughput of throughput () throughput is the ratio of the amount of time the CPU uses to run user code versus the total CPU time, that is, throughput = Run user code time/(run user code time +

JVM Tuning Summary

can reduce garbage collection time. Typically used on multi-threaded multiprocessor machines. Use -XX:+USEPARALLELGC. Open. The parallel collector, introduced in the j2se5.0 66th update, has been enhanced in Java SE6.0--the ability to heap older generations for parallel collection. If the older generation does not use concurrent collections, it is a single thread for garbage collection and therefore restricts the ability to scale. Open with -XX:+USEPARALLELOLDGC .1. Use -xx:parallelgcthreads= t

Icic of LTE key technology of wireless communication Network Learning (20141220)

ICIC:Inter Cell interference coordination, inter-cell interference coordination technology. For cellular network cell throughput is the key limit of the target is the cell disturbance, especially the cell edge users. Because the LTE system supports a frequency multiplexing factor of 1, the meticulous management of inter-cell interference is particularly important.The Icic design guideline is to increase the throug

[Performance Test] LoadRunner Results Analysis –tps

[Performance Test] LoadRunner Results Analysis –tpsFor the relationship between throughput rate and TPS, how to use this in the analysis of results, after personal experience and friends to discuss, put forward the following suggestions to guide, welcome the colleague to correct. Related definitions response time = Network response time + Application response time response time = (N1+N2+N3+N4) + (A1+A2+A3) tps:trasaction

Calculation of the bandwidth and port rate of the Resolution switch board

check whether the vswitch backboard bandwidth is sufficient The backboard bandwidth is the maximum amount of data that can be transferred between the vswitch interface processor or interface card and the data bus. The higher the bandwidth of A vswitch's backboard, the stronger the ability to process data, but the higher the design cost. However, how can we check whether the bandwidth of A vswitch backboard is sufficient? Obviously, the estimation method is useless. I think we should consider th

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