What is Heimdal Security?
Heimdal Security is a Danish cybersecurity company providing a suite of security tools including Thor Network Security, which performs DNS-based threat prevention by blocking malicious domains before a connection is established. Deployed as an enterprise endpoint agent, Heimdal's DNS filtering is used by businesses across Europe and globally to block malware, ransomware, and phishing domains at the DNS layer.
Why Heimdal Security flags legitimate domains
- Heimdal's threat intelligence engine classified your domain as a malware or phishing risk
- Your domain appeared in threat feeds consumed by Heimdal's network security platform
- A URL on your site was associated with a ransomware distribution campaign
- Your domain's DNS records or hosting infrastructure matched malicious patterns in Heimdal's model
- Partner threat intelligence ingested by Heimdal listed your domain as malicious
What a listing means for your business
Heimdal's DNS-level blocking is applied on the endpoint device before any browser connection is attempted. When Heimdal flags your domain, every employee at an affected organization sees a silent block, no browser warning, no SSL error, just a failed connection. The block applies regardless of which browser or application they use.
How BrandsDefender gets you delisted
We verify that your domain is clean, prepare the evidence Heimdal Security needs, file the false positive dispute through the right channel and follow up until the flag is removed. No cure, no pay.
Frequently asked questions
Which countries have significant Heimdal Security deployments?
Heimdal is headquartered in Denmark and has strong market penetration across Scandinavia and Northern Europe, as well as deployments across the UK, US, and global enterprise markets. Their products are particularly common in European SMBs and mid-market enterprises.
How do I submit a delisting request to Heimdal Security?
Heimdal processes false positive reports through their threat intelligence team. Evidence of site remediation and business legitimacy is required. Our team prepares the correct submission and monitors for removal confirmation.