128.2.255.154
An intelligence profile was compiled for IP 128.2.255.154/32, which was attributed to Carnegie Mellon University (ASN 9) in Pittsburgh, Pennsylvania. The system recorded a Moderate Risk reputation score of 40 with a confidence label of Very Low. Geolocation validation flagged a contradiction between the reported location and RTT physics measurements, noting a 6357km distance against a 36ms observed RTT. Network scanning confirmed the host was firewalled with no open ports or active services, and DNS resolution returned the PTR hostname POD-A-CORE2.GW.CMU.NET. The neighborhood analysis classified the subnet as mostly clean with an abuse density of 1 and one threat sibling. Behavioral data showed no honeypot hits, enumeration strikes, or active attacker classification. Operational recommendations advised rate-limiting traffic to mitigate moderate risk, utilizing the following firewall rules:
iptables: `iptables -A INPUT -s {ip} -m limit --limit 5/min -j ACCEPT`
nginx: `limit_req zone=ipdebrief burst=5`
pf: `pass in on egress from {ip} max-pkt-rate 5/1`
The activity was observed between August 29 and September 22, 2026, with a recommendation severity of medium.
This summary was generated by AI and may contain inaccuracies. Verify critical details independently.
🏢 Ownership & Registration
| Organization | Carnegie Mellon University |
| ASN | AS9 |
| Network Name | CMU-NET |
| CIDR Block | 128.2.0.0/16 |
| RIR | ARIN |
| Country | United States |
| Abuse Contact | Available via RDAP |
🌐 DNS Intelligence
| PTR | POD-A-CORE2.GW.CMU.NET |
| Forward Confirmed | Yes — FCrDNS verified |
| Forward Hostnames | POD-A-CORE2.GW.CMU.NET |
🔐 DNS Hygiene
| Hygiene Score | 20% (Poor) |
| SPF | 0/2 domains |
| DMARC | 0/2 domains |
| FCrDNS | Verified |
| DNSSEC | Not signed |
| CAA | Not configured |
| Domains Checked | 2 domains |
☁️ Network Classification
| Infrastructure | Unknown |
| Service Purpose | Firewalled / No Services |
| Network Tier | Unknown — Insufficient routing data to classify |
🔌 Services & Open Ports
| Port | Service | Protocol | Banner |
|---|---|---|---|
| No open ports detected | |||
| Closed Ports | 22, 25, 80, 443, 3389, 8080, 8443 (0 open / 7 scanned) | ||
| Server | — |
| HTTP Title | — |
🔐 TLS Certificate
| SANs | None |
| Valid From | — |
| Valid Until | — |
🎯 Confidence Breakdown
Per-dimension confidence scores based on source diversity and data freshness
| Dimension | Score | Sources | Observations |
|---|---|---|---|
| threat | 38% | 2 | 5 |
| routing | 13% | 1 | 1 |
| services | 19% | 2 | 2 |
| ownership | 27% | 2 | 3 |
| reputation | 28% | 1 | 3 |
| geolocation | 38% | 2 | 5 |
| Overall | 27% | 10 | 19 |
| Data Coherence | Mostly Consistent (80%) — 1 contradiction(s) |
| Attribution | Moderate (55%) |
| OwnershipFCrDNSGeo ConsensusGeo PlausibleIRR MatchRPKI Valid |
📅 Observation Timeline 🔄 Live
| First Seen | 2026-08-29 09:50:57 UTC |
| Last Seen | 2026-09-22 11:54:46 UTC |
| Profile Built | 2026-09-22 12:08:14 UTC |
| Data Freshness | Live |
| Signal Types | 24 |
| Total Observations | 37 |
Full dossier details are available via our API.