Security Experts:

Connect with us

Hi, what are you looking for?



Tor Network Under DDoS Pressure for 7 Months

For the past seven months, the Tor network has been hit with numerous DDoS attacks, some impacting availability.

For the past seven months, the Tor anonymity network has been hit with numerous distributed denial-of-service (DDoS) attacks, its maintainers announced this week.

Some of the attacks have been severe enough to prevent users from loading pages or accessing onion services, the Tor Project says.

Publicly released in 2003, Tor directs traffic through a global network of more than 7,000 relays, to help users maintain anonymity and protect their privacy while navigating the web. Despite its legitimate purpose, Tor has also been used for illegal activities.

Attacks against Tor are not new, with many of them seeking to deanonymize users. In DDoS attacks, the target is flooded with rogue network traffic originating from multiple different sources in an effort to disrupt the target service by depleting resources.

According to the Tor Project, despite its efforts to mitigate the impact of the experienced DDoS attacks, continuous shifts in methods are making the task difficult.

“The methods and targets of these attacks have changed over time and we are adapting as these attacks continue. It’s not possible to determine with certainty who is conducting these attacks or their intentions,” Tor says.

To improve defenses, the Tor Project is adding two new members to its network team, to focus on the development of the onion services.

At the same time, the organization is making an appeal to the community to help it fund onion service development through donations. Offering services for free, the Tor Project is funded from donations, with support coming from the Electronic Frontier Foundation (EFF), various US governmental agencies, individuals, and other third-parties.

Related: US Charges Six in Operation Targeting 48 DDoS-for-Hire Websites

Related: US Agencies Issue Guidance on Responding to DDoS Attacks

Related: Pro-Russian Group DDoS-ing Governments, Critical Infrastructure in Ukraine, NATO Countries

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

Click to comment

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join this webinar to learn best practices that organizations can use to improve both their resilience to new threats and their response times to incidents.


Join this live webinar as we explore the potential security threats that can arise when third parties are granted access to a sensitive data or systems.


Expert Insights

Related Content


Many in the United States see TikTok, the highly popular video-sharing app owned by Beijing-based ByteDance, as a threat to national security.The following is...

Cybersecurity Funding

Los Gatos, Calif-based data protection and privacy firm Titaniam has raised $6 million seed funding from Refinery Ventures, with participation from Fusion Fund, Shasta...


Employees of Chinese tech giant ByteDance improperly accessed data from social media platform TikTok to track journalists in a bid to identify the source...

Mobile & Wireless

As smartphone manufacturers are improving the ear speakers in their devices, it can become easier for malicious actors to leverage a particular side-channel for...

Application Security

Less than a week after patching critical security defects affecting multiple enterprise-facing products, VMware is warning that one of the flaws is being exploited...


U.S. fighter jets successfully shot down the high altitude spy balloon launched by and belonging to China.

Application Security

Vulnerability researchers at Google Project Zero are calling attention to the ongoing “patch-gap” problem in the Android ecosystem, warning that downstream vendors continue to...