Port 752QRH
QRH is a network port associated with the official assignment of port 752, primarily used for secure routing control applications such as `kerberos_load` and `userreg`. While it is uncommon in everyday networking, it contributes to routing authentication and management. Its usage is generally confined to specialized network infrastructure services..
- transport
- tcp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 4,916
single transport
payload readable on path
registered with iana
caution
rank 928 of 993 · top 93%
1 other service is registered on port 752. compare all 2 →
Technical Details
what runs on :752Port 752 is officially assigned by IANA for use with kerberos_load and related routing authentication services. Historically, it has been linked with the Quota Registration Handler (QRH) or OSI routing control functions within specific secured or managed networking environments. It facilitates secure updates or registrations for routing-related credentials, often interacting with Kerberos authentication protocols.
This port's typical deployment is in secure, large-scale network backbones where dynamic or authenticated routing updates are critical. Service daemons listening on this port manage routing credential distribution and verification, enhancing control over path establishment and maintenance. Organizations utilizing complex interior gateway protocols or secure routing protocols might rely on services over port 752 to maintain integrity.
Due to the specialized nature of these services, port 752 generally remains unused by everyday applications or consumer software. When deployed, it is usually limited to hardened internal segments or protected environments where network management and authentication coalesce to manage routing state and updates securely.
Security Information
exposure of :752risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
security averages 3.8 across 216 ports — this one sits 0.2 above.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
Common vulnerabilities:
- Exposure of port 752 to untrusted networks may reveal routing infrastructure to reconnaissance.
- Insufficiently secured service implementations could be susceptible to unauthorized access or privilege escalation.
- Vulnerable authentication protocols may permit man-in-the-middle attacks, leading to routing injection or hijacking.
Common mitigations:
- Restrict port 752 access to trusted hosts only using firewall rules and access control lists.
- Use strong, current authentication protocols (e.g., recent Kerberos versions with secure key exchange).
- Implement network segmentation so routing authentication services are isolated from general network traffic.
- Regularly audit service configurations and apply security updates to service daemons using this port.
Related Ports
the 8 most looked-up other ports in security — 216 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :8881 | Atlasz Secure Server | TCP | Web Services | caution | 67.6k |
| :443 | HTTPS | TCPtls | Web Services | caution | 65.9k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Squid Proxy HTTP | TCP | Web Services | caution | 45.8k |
| :8080 | HTTP Alternate | TCPtls | Web Services | caution | 44.9k |
| :7000 | Vuze HTTPS Tracker | TCPtls | Security | caution | 28.9k |
risk mix of the 8 listed
- caution100%
3 of 8 encrypted