Meraki MX content filter breaks HP Smart — category exceptions
Joe B.
Reviewed for technical accuracy
Specialities: Meraki MX content filtering, HP Smart app, cloud printers, Layer 7 firewall rules, VLAN & Wi-Fi segmentation
Meraki MX content filter blocking HP Smart — category exceptions, URL allow-list & group policy toggle matrix
Technician
Quick scan first:
• Which HP Smart platform is this — Windows, macOS, iOS/iPadOS, or Android?
• Is the MX doing Content filtering only or also Threat Protection / AMP / IDS/IPS?
• Symptoms: HP Smart stuck on “Can’t communicate with printer”, account sign-in failing, cloud services greyed out, or only failing when you’re on the corporate SSID/VLAN behind the MX?
Technician
On Meraki MX, Security & SD-WAN → Content filtering classifies outbound traffic into Talos content categories. HP Smart and HP cloud printing hit domains like
*.hp.com, *.hpprintercenter.com, *.hpeprint.com, and use HTTPS on ports 443 and 5222 (for HP cloud messaging / Print Anywhere). If those domains fall into a blocked category or your rule set is “allow top sites only”, HP Smart just sees timeouts and your printers appear offline.Plan:
1) Confirm which content categories are blocked on the MX and which URL allow-lists you already have.
2) Build a small category exceptions matrix for HP Smart (allowed domains, safe categories).
3) Apply it as a Group policy or SSID/VLAN-specific rule so only HP/print traffic bypasses the strict filter.
4) Test HP Smart sign-in, printer discovery, and scan-to-cloud again.
Technician
1) In the Meraki dashboard go to Security & SD-WAN → Content filtering for that network.
2) Temporarily attach a test client (laptop) to the same SSID/VLAN your HP Smart devices use.
3) Under “Block content categories”, set the policy to a very light profile (or uncheck most categories) and hit Save — don’t touch Threat Protection yet.
4) On the laptop, open HP Smart, sign in, and try “Print test page” or “Get printer info”.
• If HP Smart starts working immediately with lighter filtering, we know the culprit is a category block.
• If it still fails, check Security & SD-WAN → Event log for blocks on HP domains (look for
hp.com, hpeprint.com, hpconnected.com, etc.) and also review any Layer 7 firewall rules that might be blocking port 5222 or 443 to HP cloud.Once we know it’s categories and not AMP, we’ll build your exception toggle matrix.
Technician
The idea is: keep global content filtering strict, but create a narrow allow-list for HP Smart and HP printers.
1) Still on Security & SD-WAN → Content filtering, scroll to **Allowed URL patterns**.
2) Add entries for HP cloud endpoints used by HP Smart and HP+ / Instant Ink, for example:
•
*.hp.com•
*.hpprintercenter.com / *.hpconnected.com•
*.hpeprint.com(Exact list varies per printer generation, but this covers most HP Smart cloud flows.)
3) Next, create a Group policy (Network-wide → Group policies):
• Under Content filtering, set “Use network default” but tick “Override” and keep the HP URL allow-list.
• Don’t relax categories more than necessary; the allow-list will win even if Talos puts HP under “Online Backup/Software Updates”.
4) Attach that group policy to the printer VLAN or the SSID where HP Smart devices live. That way: strict filtering for users, targeted exceptions for HP Smart.
Technician
HP Smart and HP cloud printing mainly use:
• TCP 443 (HTTPS) to HP cloud & account services
• TCP 5222 (XMPP/HP cloud messaging) for Print Anywhere / Instant Ink status
• Local discovery / IPP on TCP 80/443/631 to the printer’s IP
On the MX:
• Go to Security & SD-WAN → Firewall. Make sure there are no Layer 7 rules blocking “Instant messaging”, “Peer-to-peer”, or “Online backup” in a way that catches HP’s 5222 traffic.
• Ensure outbound TCP 443 and 5222 are allowed to
*.hp.com, *.hpconnected.com, *.hpeprint.com.• If AMP/IDS is in “Security” mode and you see HP Smart traffic flagged as malware/command-and-control in the event log, add a whitelist for those HP hostnames instead of disabling AMP entirely.
This is where your “toggle matrix” lives: small changes in content categories, URL allow-list, and Layer 7 rules until HP Smart is stable but users stay filtered.
Technician
MX content filtering is applied per-network, but Group policies and SSID/VLAN settings decide who actually gets those exceptions.
• If printers sit on an IoT VLAN and users on a “Corporate” VLAN, confirm you have inter-VLAN rules allowing users to reach the printer IPs and HP Smart’s local discovery ports (80/443/631).
• Apply the HP Smart Group policy either to the printer VLAN or to the SSID used by HP Smart devices — whichever side makes more sense with your security model.
• Avoid double-filtering: don’t apply a strict content filter on both the printer VLAN and user SSID. One is enough; the other can rely on IP/firewall ACLs instead.
Once VLAN routing and policy attachment are clean, HP Smart should both discover printers locally and reach HP cloud endpoints through your MX exceptions.
Technician
• Compare the guest SSID vs corporate SSID settings in Meraki: often the guest network has no content filtering, which is why HP Smart behaves better there.
• Make sure there’s no extra DNS filtering / SafeSearch enforcement or upstream proxy on the corporate SSID that could be rewriting HP hostnames.
• If you’re using SSL inspection somewhere upstream, add HP Smart/HP printer domains to its bypass list as well; HP apps can be sensitive to man-in-the-middle inspection.
• Finally, check the MX Event log → Flows around the time a scan fails — look specifically for blocked TCP 443 / 5222 connections to HP endpoints.
Once those last toggles are aligned with your HP Smart exception matrix, scan-to-cloud and status checks should be consistent on corporate Wi-Fi too.
Technician
• Document the Allowed URL patterns (HP domains), the content categories you explicitly do not block for those flows, and the firewall ports (443/5222) you allow.
• Reuse the same Group policy across MX networks or clone it when you create new printer VLANs or SSIDs.
• When you add new HP printers or upgrade firmware, just confirm HP hasn’t introduced new cloud hostnames — if they have, add them to the allow-list and you’re done.
That way you have a repeatable, auditable set of Meraki MX content filter exceptions for HP Smart instead of ad-hoc trial-and-error each time.
Technician
Quick answer: the accepted fix
Accepted fix when a Meraki MX content filter blocks HP Smart: on the MX, keep global content filtering enabled but add a small allow-list for HP Smart/HP cloud domains, ensure outbound TCP 443 and 5222 to those hosts are allowed, and apply a Group policy or SSID/VLAN-specific policy so only the HP Smart and printer traffic receives these category exceptions while user traffic stays filtered.
Why Meraki MX content filtering breaks HP Smart (Talos categories & Layer 7 rules)
The Meraki MX content filtering engine classifies outbound HTTPS traffic by hostname using Cisco Talos categories. When you enable aggressive category blocks or “top sites only” mode, newer or less popular hosts used by HP Smart, HP+ and Instant Ink can end up blocked or uncategorised, so the MX drops the connection silently. From the user’s perspective the HP Smart app cannot connect, printers look offline, and scan-to-cloud fails even though the Wi-Fi signal is fine.
Because HP Smart relies on both local discovery and cloud messaging, any combination of blocked HP domains, restricted TCP ports 443/5222, or over-tight Layer 7 firewall rules can break it. The clean solution is not to disable content filtering, but to define a small, documented exception matrix (allowed domains, ports and categories) just for HP Smart and your HP printers.
How to verify your Meraki HP Smart exceptions actually work
After adjusting the MX rules, validate HP Smart from both a user device and the printer VLAN. Sign into HP Smart, run “Check printer status”, and send a test print and scan-to-email/cloud. In the Meraki dashboard, open the Event log and confirm you no longer see blocks for *.hp.com, *.hpconnected.com or *.hpeprint.com, and that flows on ports 443 and 5222 are allowed.
If HP Smart still shows the printer as offline, bypass the MX temporarily using a mobile hotspot. If it works off-net but not on-net, you know there is still a missing content filter exception, blocked port, or mis-applied Group policy on the Meraki MX. Iterating through this test loop is the fastest way to confirm that your HP Smart firewall rules and category exceptions are correct.
Meraki MX vs HP Smart — quick troubleshooting tips
Most HP Smart issues behind a Meraki MX are caused by content filter categories, missing URL allow-lists, or strict Layer 7 rules.
Quick path: test HP Smart on a hotspot → confirm it works off the MX → on the MX, lighten content filtering briefly to prove the cause → add HP Smart URL allow-list entries and keep ports 443/5222 open → wrap it in a Group policy or SSID/VLAN profile so only printer traffic gets the exceptions. With a documented Meraki HP Smart exception matrix, future printer roll-outs become a simple checkbox exercise instead of hours of trial and error.
Disclaimer: This information is AI-generated and intended for general guidance only. For advice specific to your environment and compliance requirements, please consult a verified expert on Whizz-Tech before changing firewall or content filter settings.
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FAQ
Why does Meraki MX content filtering break HP Smart?
The MX classifies traffic into Talos content categories and enforces Layer 7 rules. HP Smart and HP cloud printing use HTTPS to HP domains on ports 443/5222. If those domains fall into blocked categories or match a blocked URL pattern, HP Smart sees timeouts, printers show offline, and cloud features stop working until you create proper exceptions.
Which domains and ports should I allow for HP Smart behind Meraki MX?
Allow outbound TCP 443 and 5222 to HP Smart cloud services and add HP domains like *.hp.com, *.hpconnected.com, *.hpprintercenter.com, and *.hpeprint.com to the MX Allowed URL patterns. Then apply this via a Group policy or SSID/VLAN policy so only HP Smart and printers get those exceptions.
Can I keep strict Meraki content filtering and still use HP Smart?
Yes. Leave global content filtering and Threat Protection in place, but build a small HP Smart category exceptions matrix (URL allow-list, ports, minimal category overrides) and attach it to the printer VLAN or HP Smart client SSID. That preserves security for general users while letting HP Smart reach the HP cloud reliably.
How do I confirm the MX is the reason HP Smart cannot connect?
Test HP Smart on a mobile hotspot or a non-filtered guest SSID. If it works there but fails on the corporate SSID/VLAN, the Meraki MX is blocking it. Check the MX Event log for blocked HP domains or ports, then add the necessary content filter exceptions and firewall rules and retest from the same device.
Sources
- Cisco Meraki — MX Content Filtering & Threat Protection overview
- Microsoft Q&A — HP Smart app connectivity, key ports and domains
- HP Support — HP Smart app overview and network requirements
Filed under: Printers
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