裸金属服务器如何防御DDoS攻击？

DDoS攻击（即：分布式拒绝服务攻击），是一种耗尽攻击目标的系统资源，导致攻击目标无法响应正常服务请求的网络攻击方式。不仅影响用户的正常使用，同时也会造成巨大的经济损失。

DDoS攻击通过借助于“客户/服务器”技术，将多个计算机联合起来作为攻击平台，对一个或者多个目标发动攻击。它能在短时间内对攻击目标发起大量的访问请求，让攻击目标的网络陷入瘫痪或者服务器无法响应正常的访问请求，并最终造成攻击目标网站的实质性无法访问。

DDoS攻击的防御难点何在？

要防御DDoS攻击，关键在于清洗、过滤异常的流量，但是，要精准识别、清洗和过滤异常的攻击流量，单靠人工操作无法实现，而需要依靠服务器系统资源和网络带宽资源，这显然会增加用户的成本。换句话说，高成本，是防御DDoS攻击的最大难点。

如何有效防御DDoS攻击，并实现成本最低？

配置专业的硬件防火墙、升级网络带宽容量、购买高防IP、制定相应的防护策略等，是防御DDoS攻击的有效办法，但配套这类软件和硬件以及防护策略，用户的成本必然会增加。

为此，一些云计算厂商针对该类问题提出了切实有效的解决方案，比如主机参考为用户提供专业抗DDoS攻击的高防裸金属服务器，可以提供各种防御超大流量、DDOS流量等清洗服务，具有“超大防护带宽、超强清洗能力、全业务场景支持”的特点。具体详询主机参考客服zhujicankao.com。

主机参考裸金属服务器可配置智能硬件防火墙，并为用户配置高防IP，应对DDoS攻击，可快速识别恶意流量，并将恶意流量牵引流至高防IP。进而进行清洗、过滤，再将正常流量返回给源站IP。

主机参考裸金属服务器的DDoS攻击防御策略有何优势？

①超大防护带宽。网络带宽是应对DDoS攻击的首要重要资源，网络带宽资源越充足，就越能应对并承载DDoS攻击。主机参考裸金属服务器在部署中，接入T级超大防护带宽，单机最高可提供数百G的恶意流量攻击防御和清洗，能够满足不同用户的防御需求。

②全面防御多类型DDoS攻击。实际上，DDoS攻击不是单一的，而是一大类网络攻击的总称，它包括：SYN Flood / TCP Flood / UDP Flood / ICMP Flood等类型，以及Land、Teardrop、Smurf等变种类型，主机参考裸金属服务器能对多类型及变种的DDoS攻击进行有效防护。

③黑洞自动解封。当服务器面临的DDoS攻击停止或流量低于防御峰值，系统封禁状态将自动解除，无需等待，减少用户业务的不可用时间。

④全业务场景支持。支持各种业务场景的DDoS攻击防御，可为政务、游戏、电商、教育、医疗、金融、流媒体等行业和领域提供有效防护。

⑤流量实时监控。可视化的管理控制后台，提供攻击流量日志记录等信息，实时监控网络流量与服务器运行状态，帮助用户随时掌握业务运行情况。

DDoS攻击不同于其他恶意篡改数据或劫持类攻击，不仅技术门槛低，而且能达到直接摧毁目标的目的，因此DDoS攻击也是近年来黑客攻击的主要手段，以获取敲诈勒索、商业竞争等黑色利益。DDoS攻击愈演愈烈，成为全球范围内难以攻克的一个顽疾，配备高防裸金属服务器将会成为低成本防御DDoS攻击的有效手段。高防裸金属服务器具体详询主机参考客服zhujicankao.com。

DDoS attack (i.e. distributed denial of service attack) is a kind of network attack mode that exhausts the system resources of the attack target and causes the attack target unable to respond to the normal service request. It will not only affect the normal use of users, but also cause huge economic losses.

DDoS attacks attack one or more targets by using "client / server" technology to combine multiple computers as attack platform. It can launch a large number of access requests to the target in a short time, which makes the network of the target paralyzed or the server unable to respond to the normal access requests, and ultimately causes the target website to be unreachable substantially.

What are the difficulties of DDoS attack defense?

To defend against DDoS attacks, the key is to clean and filter the abnormal traffic. However, to accurately identify, clean and filter the abnormal attack traffic, it can not be realized by manual operation alone, and it needs to rely on server system resources and network bandwidth resources, which will obviously increase the cost of users. In other words, high cost is the most difficult point to defend against DDoS attacks.

How to effectively prevent DDoS attacks and achieve the lowest cost?

It is an effective way to defend against DDoS attacks to configure professional hardware firewalls, upgrade network bandwidth capacity, purchase high anti IP, and formulate corresponding protection strategies. However, the cost of supporting such software, hardware and protection strategies will inevitably increase.

For this reason, some cloud computing companies have put forward practical and effective solutions to this kind of problems, such as the host reference provides users with professional anti DDoS attack high anti bare metal servers, which can provide a variety of anti super traffic, DDoS traffic and other cleaning services, with the characteristics of "super anti bandwidth, super cleaning ability, full business scenario support". For details, please refer to customer service zhujicankao.com.

The host can configure intelligent hardware firewall with reference to bare metal server, and configure advanced anti IP for users to respond to DDoS attacks, quickly identify malicious traffic, and draw malicious traffic to advanced anti IP. Then clean and filter, and return the normal flow to the source IP.

What are the advantages of the DDoS attack defense strategy of the host reference bare metal server?

① Large protection bandwidth. Network bandwidth is the primary and important resource to deal with DDoS attacks. The more sufficient network bandwidth resources are, the more able to deal with and carry DDoS attacks. In the deployment of the host reference bare metal server, access to the T-class super large protection bandwidth, the single machine can provide up to hundreds of g of malicious traffic attack defense and cleaning, which can meet the defense needs of different users.

② Comprehensive defense against multiple types of DDoS attacks. In fact, DDoS attack is not a single attack, but a general term of a large category of network attacks. It includes: SYN Flood / TCP flood / UDP flood / ICMP flood and other types, as well as land, teardrop, Smurf and other variants. The host can effectively protect multiple types and variants of DDoS attacks by referring to bare metal servers.

③ Black hole automatically unsealed. When the DDoS attack faced by the server stops or the traffic is lower than the defense peak, the system will automatically release the blocking state without waiting, reducing the unavailable time of the user service.

④ Full business scenario support. Supporting DDoS attack defense in various business scenarios can provide effective protection for government affairs, games, e-commerce, education, medical care, finance, streaming media and other industries and fields.

⑤ Real time traffic monitoring. Visual management and control background, providing attack traffic logging and other information, real-time monitoring of network traffic and server operation status, to help users master business operation at any time.

Different from other malicious data tering or hijacking attacks, DDoS attacks not only have a low technical threshold, but also can directly destroy the target. Therefore, DDoS attacks are also the main means of hacker attacks in recent years to obtain blackmail, commercial competition and other black interests. DDoS attacks are becoming more and more fierce, and become a stubborn disease that is difficult to overcome in the global scope. It will be an effective means of low-cost defense against DDoS attacks to equip with high anti bare metal servers. For details of high anti bare metal server, please refer to customer service zhujicankao.com.

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