IP Threat Report
51.77.66.107
ABUSE.MOM — BEHAVE OR GET EXPOSED
Geolocation & Classification
Detection Signatures
| Signature | Description | Points | Severity |
|---|---|---|---|
| Danger strong hits: 2 | High-risk paths: shells, RCE vectors, exploits | +50 | |
| Danger medium hits: 1 | Medium-risk: admin panels, config files | +10 | |
| Burst: 5 req / 2s | Abnormally fast request rate — automated scanning | +35 | |
| POST requests present | Behavioral anomaly detected by automated analysis | +8 |
Observed Activity
Reconstructed HTTP requests from server access logs. Target domains redacted for security.
* Typical request patterns for detected signatures. Actual target domains are redacted.
Timeline
Network Provider
Recommendations
Actions taken & recommended
- IP 51.77.66.107 is blocked at application level (HTTP 403)
- Consider blocking at firewall level (iptables/CSF) to reduce server load
- Report abuse to the network provider via their abuse contact
- Ensure sensitive files (.env, .git, backups) are not accessible from the web
🌊 Traffic Flood Defense
IP 51.77.66.107 is generating excessive traffic. Limit connections per source IP. Enable geographic blocking if traffic from this region is unexpected.
Open Ports & Services
Network reconnaissance data from Shodan. Open ports may indicate running services, misconfigurations, or potential attack surfaces.
| Port | Service | Risk | Description |
|---|---|---|---|
| 21 | FTP | Medium | File Transfer Protocol — often targeted for anonymous login attacks |
| 22 | SSH | Low | Secure Shell — common brute force target for remote access |
| 25 | SMTP | Medium | SMTP mail server — can be abused for spam relay |
| 53 | DNS | Low | DNS server — potential for DNS amplification attacks |
| 80 | HTTP | Low | HTTP web server — standard web traffic |
| 110 | POP3 | Low | Service on port 110 |
| 443 | HTTPS | Low | HTTPS web server — encrypted web traffic |
| 465 | Unknown | Low | Service on port 465 |
| 587 | Unknown | Low | Service on port 587 |
| 993 | IMAPS | Low | Service on port 993 |
| 995 | POP3S | Low | Service on port 995 |
| 2031 | Unknown | Low | Service on port 2031 |
| 2082 | Unknown | Low | Service on port 2082 |
| 2083 | Unknown | Low | Service on port 2083 |
| 2086 | Unknown | Low | Service on port 2086 |
| 2087 | Unknown | Low | Service on port 2087 |
| 2096 | Unknown | Low | Service on port 2096 |
⚠️ 1 high-risk port detected on 51.77.66.107. These services should not be publicly accessible without strict firewall rules.
| CVE ID | Link |
|---|---|
| CVE-2023-0464 | NVD → |
| CVE-2013-2765 | NVD → |
| CVE-2018-0739 | NVD → |
| CVE-2018-15473 | NVD → |
| CVE-2025-65082 | NVD → |
| CVE-2023-48795 | NVD → |
| CVE-2025-49812 | NVD → |
| CVE-2013-0942 | NVD → |
| CVE-2025-68160 | NVD → |
| CVE-2009-3766 | NVD → |
| CVE-2019-6111 | NVD → |
| CVE-2019-6109 | NVD → |
| CVE-2013-4365 | NVD → |
| CVE-2024-43394 | NVD → |
| CVE-2022-2068 | NVD → |
| CVE-2024-43204 | NVD → |
| CVE-2017-3736 | NVD → |
| CVE-2025-23048 | NVD → |
| CVE-2021-23840 | NVD → |
| CVE-2013-0941 | NVD → |
| CVE-2023-0466 | NVD → |
| CVE-2009-0796 | NVD → |
| CVE-2019-1559 | NVD → |
| CVE-2025-32728 | NVD → |
| CVE-2017-15906 | NVD → |
🔴 This host has 85 known CVEs associated with its exposed services. This volume strongly suggests severely outdated software. Review each CVE in the NVD database.
Data source: Shodan InternetDB. Scanned independently of abuse.mom.
Blacklist Status (DNSBL)
This IP was checked against major DNS-based blacklists used by mail servers and firewalls worldwide.
Checked: Spamhaus, SpamCop, Barracuda, SORBS, CBL, UCEProtect. Results may change over time.
Threat Analysis
51.77.66.107 has been assigned a threat score of 103/100 (Critical). With this rating, the IP falls into the critical severity bracket — among the most dangerous addresses in our monitoring database.
The following attack categories were identified:
📊 Threat Analysis
Network traffic from 51.77.66.107, located in Limburg an der Lahn, Germany, operating on the network of OVH SAS, has been classified as malicious by our automated threat scoring engine. Over a period of 1 days, this IP generated 1 malicious requests, averaging approximately 1 requests per day. The IP is classified as hosting/datacenter infrastructure, commonly associated with rented servers used for automated attack campaigns, botnet command-and-control, or vulnerability scanning at scale. The IP is engaged in request flooding, sending traffic at rates designed to exhaust server capacity. Germany currently accounts for 104 blocked IPs in our database, making it a significant source of malicious traffic. With a threat score of 103/100, this IP is among the most dangerous addresses in our database. Immediate and complete blocking is strongly recommended.
This IP belongs to a hosting or data center provider. Malicious traffic from hosting infrastructure often originates from compromised VPS instances, rented servers used for scanning campaigns, or abused free-tier cloud accounts. Hosting providers typically respond to abuse reports within 24-72 hours.
Related Threats
Security Intelligence
💡 XML External Entity (XXE) Attacks
XXE vulnerabilities in XML parsers allow attackers to read local files, perform SSRF, and execute denial of service attacks. Many legacy applications and APIs remain vulnerable to XXE due to insecure default XML parser configurations.
💡 VPN Exit Node Reputation
VPN exit nodes aggregate traffic from many users, creating mixed reputation profiles. While legitimate users seek privacy, attackers exploit VPN services to anonymize malicious activity, making IP-based blocking of VPN nodes a complex policy decision.