Table of Contents
Preface
1. Selection of high-defense CDN
1. Acceleration performance
2. Resistance to attacks
3. Global coverage capabilities
4. Reliability and stability
2. Selection of high-defense IP
1. Defense capability
2. Service quality
3. Security
4. Price
3. Comparison of the advantages and disadvantages of high-defense CDN and high-defense IP
1. Advantages and disadvantages of high-defense CDN
2. Advantages and Disadvantages of High Defense IP
Summarize
Foreword
With the rapid development of the Internet, the number and types of cyber attacks are also increasing. Especially in the fields of finance, e-commerce, games, government, etc., the protection of network security is particularly important. In this case, high-defense CDN and high-defense IP have become the solutions chosen by more and more enterprises and individuals.
This article will conduct an in-depth discussion from the aspects of high-defense CDN and high-defense IP respectively, introduce the key factors, advantages and disadvantages of how to choose high-defense CDN and high-defense IP, and provide corresponding code and cases to help readers better understand.
1. Selection of high-defense CDN
1. Acceleration performance
The main function of a high-defense CDN is to improve the access speed of websites and applications. Therefore, when choosing a high-defense CDN, you should consider its acceleration performance. A comprehensive assessment can be made from the following aspects:
- Access speed: When choosing a CDN merchant, you should refer to its CDN test report and performance data to understand its access speed performance in order to choose the optimal solution.
- Number of same-IP requests: The number of same-IP requests of a CDN node affects its cache performance. Generally, the smaller the number of same-IP requests, the better the cache effect and the faster the access speed.
- Number of concurrent requests: The number of concurrent requests indicates the number of requests that the CDN node can handle at the same time. When choosing a CDN merchant, you should consider its limit on the number of concurrent requests in order to provide sufficient service capabilities for your website and applications.
The following code is a simple example of testing CDN node access speed:
import requests
import time
url = 'http://cdn.example.com/test.jpg'
# Testing frequency
test_count = 10
#Total time spent
total_time = 0
for i in range(test_count):
start_time = time.time()
requests.get(url)
end_time = time.time()
total_time + = (end_time - start_time)
print('Average access time: {} seconds'.format(total_time / test_count))
2. Anti-attack ability
The anti-attack ability of high-defense CDN is also an important factor in selection. CDN merchants should have strong defense capabilities and be able to resist multiple types of attacks, such as DDoS attacks, malicious requests, etc. When selecting a CDN merchant, you can refer to the test data and performance indicators of its defense capabilities, and use corresponding tools to evaluate whether the CDN merchant has good defense capabilities. For example, the following is an example of using the Siege tool to test the CDN merchant’s ability to withstand pressure:
siege -b -t 1M -c 100 http://cdn.example.com
In this example, `siege` is an open source stress testing tool. The `-b` option means to keep the stress test uninterrupted, the `-t` option means that the stress test duration is 1 minute, and the `-c` option means that the stress test is concurrent. The number is 100.
3. Global coverage capability
Considering the globalized Internet environment, the global coverage capability of high-defense CDN is also an important factor in the choice. CDN merchants should have deployment nodes around the world to distribute resources to users’ geographical locations as quickly as possible. When selecting a CDN merchant, you can refer to its node distribution, bandwidth capacity, bandwidth rental and other data, and use corresponding tools to evaluate whether the CDN merchant’s global coverage capability is strong enough. For example, the following is an example of using the MTR (My Trace Route) tool to test the connection speed of a CDN merchant node:
mtr -n --tcp -c 10 cdn.example.com
In this example, `mtr` is an open source network diagnostic tool, the `-n` option means to disable DNS resolution, the `–tcp` option means to use the TCP protocol for testing, and the `-c` option means that the number of tests is 10.
4. Reliability and Stability
The reliability and stability of high-defense CDN products are also an important selection criterion. CDN merchants should have a professional operation and maintenance team that can ensure the normal operation of CDN nodes and the stability of services in a timely manner. When choosing a CDN merchant, you should check the background and experience of its operation and maintenance team, and understand its service level, SLA (Service Level Agreement) and other aspects.
2. Selection of high-defense IP
1. Defense ability
The defense capability of high-defense IP is the most important factor in selection. Therefore, when choosing a high-defense IP, you should consider its anti-attack capabilities, including the flexibility of cleaning traffic and protection rules. Generally speaking, high-defense IP merchants should be able to effectively clean various types of attacks, such as DDoS attacks, CC attacks, Web attacks, etc., and should have flexible configuration and rich rule protection capabilities.
2. Service quality
The service quality of high-defense IP is also an important factor in selection. When choosing a high-defense IP, you should consider its service quality, data reliability, and professional operation and maintenance team. In addition, the scalability and adaptability of its services should also be considered. For example, the following is an example of using a Python script to test the availability of high-defense IP services:
import requests
url = 'http://example.com'
# List of IPs to be detected
ip_list = ['1.2.3.4', '5.6.7.8', '9.10.11.12']
for ip in ip_list:
try:
# Construct proxy request
proxies = {'http': ip, 'https': ip}
requests.get(url, proxies=proxies, timeout=5)
print('{}Test successful!'.format(ip))
except:
print('{}Test failed!'.format(ip))
In this example, the `requests` library is used to send requests, and the IP list to be detected is sent as a proxy server to make requests, and the request timeout is set to 5 seconds to test the availability of the IP.
3. Security
When choosing a high-defense IP, you should also consider its security. High-defense IP merchants should have a highly confidential access mechanism to ensure data security and confidentiality. In addition, high-defense IP merchants should also have a professional security team that can identify and respond to malicious attacks in a timely manner. For example, here is an example of using the Nmap tool to test the security of Anti-DDoS IP:
nmap -sS -Pn -sV -T4 -p 80,443,8080,8443 IP address
In this example, `nmap` is an open source port scanning tool, the `-sS` option means to use TCP SYN scanning mode for testing, the `-Pn` option means to disable host discovery, the `-sV` option means version detection, `- The T4` option indicates using fast scan mode, and the `-p` option indicates specifying the port number to be scanned.
4. Price
The price of high-defense IP is also an important factor in selection. You should choose a high-defense IP service provider with reasonable price and high cost performance. When choosing a high-defense IP service provider, you can consider the different plans they provide and their prices, traffic bandwidth, cleaning times and other information.
3. Comparison of the advantages and disadvantages of high-defense CDN and high-defense IP
After understanding the key factors in choosing high-defense CDN and high-defense IP, we can further compare the advantages and disadvantages of the two to better choose a solution that suits your needs.
1. Advantages and disadvantages of high-defense CDN
advantage:
- It can improve the access speed of websites and applications and reduce access delays caused by geographical location, network delay and other reasons.
- It can disperse network traffic to different CDN nodes, improve network bandwidth and service capabilities, and ensure high availability and stability of websites and applications.
- It can effectively shorten the propagation scope of network attacks and reduce the threat of network attacks.
- It can provide rich data analysis and monitoring functions to optimize the operating efficiency and user experience of websites and applications.
shortcoming:
- This may lead to CDN cache inconsistencies, which require corresponding cache control and management.
- May affect dynamic interactive functions of websites and applications, such as online chat, data transmission, etc.
- Personal data or privacy may be exposed, and corresponding privacy protection and security measures are required.
2. Advantages and disadvantages of high-defense IP
advantage:
- It can provide customized defense solutions to effectively resist DDoS, CC and other types of attacks, ensuring the security and stability of websites and applications.
- It can provide flexible IP switching and protection rules to ensure that website and application resources are optimally utilized.
- It can ensure the security and confidentiality of data and provide certain security guarantees for enterprises and individuals.
- The price is relatively cheap and suitable for small and medium-sized enterprises and individuals.
shortcoming:
- It may affect the access speed and stability of websites and applications, and requires corresponding bandwidth adjustment and traffic allocation.
- This may lead to unreasonable or inaccurate settings of defense rules, affecting the normal operation of applications and businesses.
- This may result in incomplete cleaning of attack traffic, affecting defense effectiveness and resource utilization.
Summary
To sum up, the key to choosing a high-defense CDN and high-defense IP is to combine your own needs, comprehensively consider factors such as its acceleration performance, anti-attack capabilities, global coverage capabilities, reliability and stability, defense rules, etc., and target specific Choose according to the situation. At the same time, in practical applications, it is necessary to continuously optimize and adjust the high-defense CDN and high-defense IP in order to obtain better performance and service quality.