Introduction
Running a free subdomain service comes with a unique set of moderation challenges. On one hand, you want to give everyone the freedom to create and host content without unnecessary gatekeeping. On the other hand, bad actors will inevitably try to abuse the platform for phishing, spam, malware distribution, and impersonation. Balancing these competing priorities — trust and safety versus open access — is the central operational challenge of running is-pro.dev. This post explains how we approach abuse detection, handling, and appeals without breaking the experience for legitimate users.
The Scale of the Challenge
When you offer free subdomains, you become a target for every type of online abuse. Phishers love free subdomains because they can register seemingly legitimate URLs like secure-login.bankname.is-pro.dev. Spammers use them to host redirect pages that bypass URL filters. Malware distributors use them as staging servers. And impersonators register subdomains that mimic popular brands. Against this backdrop, we need systems that detect and stop abuse without requiring manual review of every registration — which would be impossible at scale. Our approach combines automated scanning, community reporting, and a tiered response system that prioritizes speed for abuse takedowns while giving legitimate users due process.
Automated Detection Systems
Every subdomain registered on is-pro.dev passes through automated screening before it becomes active. Our systems check the requested subdomain name against known patterns of abuse: does it contain trademarked brand names? Does it match patterns used in previous phishing campaigns? Is the name randomly generated (a common pattern for throwaway abuse domains)? These checks happen in milliseconds and flag suspicious registrations for manual review without delaying legitimate registrations. After a subdomain is active, periodic scans check the content being served. We look for known phishing page templates, malware signatures, and content that violates our acceptable use policy. Automated scanning is not perfect — it produces false positives and misses sophisticated abuse — but it catches the vast majority of obvious violations before any user encounters them.
The Abuse Reporting Pipeline
When a user or external party reports an abusive subdomain, the report enters our triage pipeline. Each report is assigned a priority based on severity: phishing and malware reports are escalated immediately, spam and impersonation reports are handled within hours, and low-severity violations like trademark disputes are addressed within days. We verify each report by checking the subdomain's content, reviewing DNS records, and cross-referencing against threat intelligence feeds. If the report is confirmed, the subdomain is suspended and the owner receives a notification explaining the reason and providing an appeal process. False reports are tracked — repeated false reporters may lose the ability to submit reports.
Handling False Positives
Automated systems make mistakes. A legitimate developer portfolio might trigger a phishing scanner because it contains a login form demo. A blog post critical of a large corporation might be reported as impersonation. Our approach to false positives is: suspend first, investigate quickly, reinstate immediately if wrong. When we suspend a subdomain based on an automated flag or report, the owner is notified with clear information about why the suspension occurred and what they can do to appeal. Our team aims to review appeals within 2 hours during business hours and within 12 hours overnight. If the suspension was in error, we reinstate the subdomain and add the pattern to our whitelist to prevent recurrence. This approach errs on the side of safety for the broader user base while keeping response times fast for affected users.
The Appeal Process
Every subdomain suspension includes a right to appeal. The appeal process is deliberately low-friction: email us at the address provided in the suspension notice, explain your situation, and provide evidence that your content is legitimate. For false positives, a brief explanation and a link to the content usually suffices. For cases where the content violates our policies but the violation is minor (e.g., a personal site with affiliate links that could be considered spam), we work with the owner to fix the issue rather than maintaining the suspension. Repeat violations or intentional abuse results in permanent suspension. The appeal process is designed to catch our mistakes and give well-meaning users a path to resolution, not to give bad actors second chances.
Balancing Free Speech and Platform Safety
One of the hardest questions we face is where to draw the line between legitimate expression and policy violation. A subdomain hosting a parody of a political figure — is that free expression or impersonation? A site criticizing a company's business practices — is that legitimate commentary or a trademark violation? Our guiding principle is to err on the side of free expression while taking decisive action against content that causes concrete harm: phishing, malware, harassment, and illegal content. For borderline cases, we prefer to explain the issue to the subdomain owner and give them an opportunity to adjust their content rather than imposing an immediate suspension. This approach respects our users' creativity while maintaining a safe platform for everyone.
Transparency and Trust
We publish regular transparency reports summarizing abuse takedowns, appeal outcomes, and policy changes. These reports help our community understand how the platform is being used and what actions we are taking to keep it safe. We also maintain a clear acceptable use policy that explains what is and is not allowed in plain language, with specific examples. Our goal is to build trust through transparency — when users understand how moderation decisions are made, they are more likely to accept them, even when they disagree with a specific outcome.
Conclusion
Running a free subdomain service means constantly balancing the needs of legitimate users against the actions of bad actors. Our approach combines automated detection, community reporting, fast response times, and a fair appeal process. We do not catch every violation, and we occasionally make mistakes, but our commitment to transparency and due process ensures that the platform remains open and useful for the vast majority of developers who use it legitimately.
Key Takeaways
- Automated systems catch most abuse at registration time without delaying legitimate signups
- Reports are triaged by severity: phishing/malware get immediate action, lower severity gets faster review
- False positives happen — we suspend first, investigate fast, and reinstate immediately if wrong
- The appeal process is designed to be low-friction for legitimate users
- Transparency reports and clear policies build trust with the community
Frequently Asked Questions
Is is-pro.dev really free to use?
Yes, is-pro.dev provides free subdomains for developers with no hidden fees.
What can I host on an is-pro.dev subdomain?
Any legitimate project — portfolios, SaaS apps, game servers, APIs, and more.