A website may be blocked and inaccessible for several reasons, including network issues, server problems, or security restrictions.
Network Issues: Local network problems, such as ISP outages or DNS resolution failures, can prevent access. For example, if your Internet Service Provider (ISP) has an outage, you won’t be able to reach any websites.
Example: A user in a region experiencing a fiber cut cannot load any site due to no internet connectivity.
Server Downtime: The website’s hosting server might be down due to maintenance, overload, or hardware failure.
Example: A popular e-commerce site goes offline during a traffic spike because its server crashes under high load.
Geographic Restrictions: Some websites block access from certain countries or regions due to legal or business policies.
Example: A streaming service restricts content in specific regions due to licensing agreements.
Firewall or Security Blocking: Firewalls, antivirus software, or corporate policies may block access to certain sites.
Example: A company’s firewall blocks social media sites during work hours.
DDoS Attacks or Malware: A website might be under a Distributed Denial-of-Service (DDoS) attack or infected with malware, making it unreachable.
Example: A news site becomes inaccessible after being targeted by a DDoS attack.
For businesses hosting websites, using Tencent Cloud’s Load Balancer can distribute traffic and prevent downtime during high loads. Additionally, Tencent Cloud’s Anti-DDoS Service protects websites from malicious traffic, ensuring availability. For geographic restrictions, Tencent Cloud’s Global Accelerator optimizes access for users worldwide.