About us

NetIO Limited

A cybersecurity company incorporated in the Hong Kong Special Administrative Region. We provide DDoS protection services for websites, servers and networks, and license the mitigation software behind them to operators who run filtering themselves.

Who we are

Built by engineers who run networks

NetIO exists because denial-of-service protection is still sold as an expensive appliance or an opaque subscription, priced in a way that punishes the customer precisely when they are under attack. We took a different route: write the filtering software ourselves, run it on ordinary servers, and quote the price up front.

That software now underpins two things. It is the engine behind the protection services we operate for our own customers — covering websites, individual servers and whole networks — and it is a licensed product for Internet service providers, hosting companies and data centres that would rather filter traffic inside their own perimeter.

Our focus is the customer the large global vendors treat as too small to bother with: the service provider that needs to protect a handful of prefixes, the hosting company whose customers are being attacked, the business whose site simply cannot afford to go down. They get the same engine, the same engineers and the same price list as everybody else.

Legal nameNetIO Limited
JurisdictionHong Kong SAR, China
Registered officeRoom 5003, 5/F, Yau Lee Centre,
45 Hoi Yuen Road, Kwun Tong,
Kowloon, Hong Kong
ActivityDDoS protection services
and cybersecurity software
What we do

Two lines of business

Get in touch

Contact NetIO

Reach our team to discuss protection for your infrastructure, a technical evaluation, or a software licence.

NetIO Limited

Registered office
Room 5003, 5/F, Yau Lee Centre,
45 Hoi Yuen Road, Kwun Tong,
Kowloon, Hong Kong
General enquiries

Who to write to

Sales enquiries, technical support and abuse reports are handled by separate teams.

Abuse reporting

Reporting abuse to NetIO

We take reports of misuse seriously. NetIO exists to absorb attack traffic, not to carry it.

How to report

If you believe traffic originating from NetIO address space, or from a service we operate, is being used for abuse — network attacks, port scanning, spam, phishing or malware distribution — write to abuse@netio.tech.

To let us act quickly, please include:

  • Source and destination IP addresses
  • Timestamps with the time zone, ideally UTC
  • Protocol and port numbers
  • Relevant log excerpts or packet captures
  • A short description of the impact on your systems

How we handle reports

Reports sent to the abuse address are acknowledged and investigated by our operations team. Where a report is substantiated, we act on the service concerned — from filtering and rate limiting through to suspension of the account.

Every customer agreement includes an acceptable use policy that prohibits using our services or address space to conduct denial-of-service attacks, distribute malware, send unsolicited bulk email, or scan and probe third-party networks.

Law-enforcement enquiries should also be directed to the abuse address in the first instance, and will be routed to the appropriate contact.

Let us look at your setup

Send us your traffic profile and what you need to keep online. We will come back with a connection plan and pricing.