Block Lists: what to verify before client handoff

Handoff fails when the client says the site is down from their school network and your office DNS still looks fine. What an attacker, a parent filter, or a privacy resolver sees on the public surface is not always what your laptop sees. SlaySlop's DNS block lists check exists for that gap: it "checks whether the domain or address appears on public block lists," and the product about text says it "checks access to the URL using 10+ of the most popular privacy, malware and parental control blocking DNS servers."

That is the outcome I want before the handoff call. Clear on those resolvers, or a named listing with evidence. Not a shrug.

Boundaries first

This is a read-only reputation signal on a public URL you own, manage, or have permission to test. It is not a pentest. It does not delist you. It does not prove headers, TLS, or client-bundle secrets are clean. SlaySlop's Acceptable Use still applies if someone pastes a third-party domain without permission.

Keep the check in its lane on the call. Clients hear "block list" and invent courtroom drama. You need the narrower sentence: common blocking DNS resolvers either filter this name or address, or they do not, at scan time.

What to verify on the happy path

1. Production hostname, not the staging alias you lived on for three months.
2. Apex and the marketing subdomain people actually type, if both are live.
3. Evidence rows: blocklist context, IP, status, plus the blocked-versus-clear summary the UI can show.
4. A plan owner if anything is listed: DNS, hosting, CDN, or abuse desk.

authority: read-only check: dns-block-lists

Finding language in the product includes "Listed on DNS blocklist." Evidence copy talks about DNS blocklist resolver results for the domain and a summary of blocked versus clear counts. That table is what belongs in the client portal, not a red badge screenshot with no rows.

Pitfalls that embarrass you on a call

Probing only the brochure CDN hostname while checkout lives elsewhere. Assuming a shared CDN anycast IP listing means your brand is "malware." Declaring victory from one dig against 8.8.8.8. Skipping a rescan after the host moved IPs last night.

# Permissioned sanity check before the call (not the full SlaySlop check)
dig client-example.com A +short
dig @9.9.9.9 client-example.com A +short
curl -sI "https://www.client-example.com/" | sed -n '1,12p'

If dig and a blocking resolver disagree, you have a taste of the listing problem. Still open the SlaySlop evidence for the multi-resolver summary you will show the client.

Related next step

Pair block lists with availability status and the security pass that also looks at headers, TLS, and client-side secrets. Reputation clear plus a dead probe URL is still a bad handoff. Soft close: run the production URL through SlaySlop while you still own the launch week calendar, open the DNS block lists rows, and paste the summary into the portal before anyone asks "are we on a list?"

Checklist I actually bring to the call

I print a short list so the conversation stays concrete:

• Production URL scanned today, not last Tuesday's staging run.
• DNS block lists summary attached to the shared portal or PDF export.
• If listed: hostname versus IP noted in the ticket subject line.
• Remediation owner named with a date, even if the date is "after DNS TTL."
• Sister checks glanced at: availability status, TLS, client-side secrets.

Agencies lose face when the portal shows a red reputation row the account lead never opened. Ranked findings with evidence only help if someone read them before the calendar invite.

Permission and scope in one breath

Say it once at the start of handoff: we ran a read-only public scan on hosts we manage. We did not pentest. We did not attempt delisting inside the scanner. If the client wants a deeper offensive assessment, that is a different engagement and a different contract. Keeping that sentence ready prevents the block-list row from mutating into something it is not.