Port 751PUMP Protocol
**PUMP (Packet Usage Measurement Protocol)** is an official experimental protocol designed to facilitate usage measurement and accounting on IP networks. It operates on both TCP and UDP port 751, enabling flexible communication options. Despite its limited adoption, it has historical significance in early network accounting concepts..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 5,285
2 transports registered
payload readable on path
registered with iana
caution
rank 897 of 993 · top 90%
1 other service is registered on port 751. compare all 2 →
Technical Details
what runs on :751Overview: The Packet Usage Measurement Protocol (PUMP) is an experimental service intended for network accounting and statistics collection. Its main goal is to provide a standardized method for measuring network traffic and resource utilization across IP-based networks.
Transport Protocols: PUMP communicates using both TCP and UDP on port 751, accommodating reliable and fast data transmission, respectively. However, because of its experimental status, broad client and server implementations remain limited.
Historical Context: Developed as part of efforts to measure and manage data usage, PUMP offered early insight into network billing and performance management frameworks. While largely superseded by more modern protocols like SNMP and NetFlow, it inspired these robust network monitoring solutions.
Security Information
exposure of :751risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
network services averages 3.9 across 604 ports — this one sits 0.1 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 · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Lack of encryption, leading to potential exposure of sensitive metering data during transmission.
- Weak authentication or no authentication, raising risks of spoofing or data manipulation.
- Potential for denial-of-service attacks via crafted packets to overwhelm metering components.
Common Mitigations:
- Avoid exposing PUMP services to untrusted or public networks.
- Employ network segmentation and firewall rules to restrict access.
- Encapsulate communication within secure tunnels (e.g., VPN) to supply encryption.
- Consider disabling or replacing PUMP with modern, secure, and supported alternatives like SNMP v3 or NetFlow.
Related Ports
the 8 most looked-up other ports in network services — 604 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :6543 | Jetnet | UDP | Network Services | caution | 65.3k |
| :5938 | TeamViewer | TCPUDP | Remote Access | caution | 65.0k |
| :8291 | Winbox MikroTik Admin | TCP | Security | caution | 62.9k |
| :3233 | WhiskerControl Protocol | TCPUDP | Network Services | caution | 61.9k |
| :3268 | Microsoft Global Catalog (GC) | TCPUDP | Security | caution | 54.6k |
| :135 | Microsoft EPMAP | TCPUDP | Security | caution | 51.9k |
| :3128 | Tatsoft Default HTTP Proxy | TCP | Web Services | caution | 46.8k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted