Port 4949Munin
Munin is an open-source monitoring tool designed to analyze and visualize the performance of computers, networks, and applications. Utilizing a client-server architecture, it collects extensive metrics from various system resources and presents them through detailed web-based graphical interfaces. This allows administrators to easily monitor resource usage trends, detect anomalies, and maintain optimal system health..
- transport
- tcp
- in transit
- cleartext
- assignment
- official
- risk
- 5/10
- lookups
- 8,890
single transport
payload readable on path
registered with iana
caution
rank 558 of 993 · top 56%
Technical Details
what runs on :4949-
Architecture: Munin operates on a client-server model. The Munin master node periodically polls data from Munin nodes (agents) deployed on monitored systems using a simple TCP connection (port 4949). The collected data includes CPU usage, memory consumption, disk I/O, network traffic, and other vital system statistics.
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Functionality: The Munin nodes execute plugin scripts that gather specific metrics. These plugins cover a wide variety of system and application parameters, and administrators can extend functionality by adding custom plugins. Data fetched from nodes is stored on the master, and Munin then generates historical performance graphs, typically accessed via a lightweight web interface.
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Protocol and Accessibility: Communication between master and nodes typically occurs over unencrypted TCP on port 4949, which is straightforward but has minimal security features. Network segmentation or tunneling (e.g., via SSH) is often used to restrict access to Munin nodes.
Security Information
exposure of :4949risk score
5/ 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 1.1 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
every listening transport is another surface to filter at the edge
security overview
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Common Vulnerabilities:
- Since communication is unencrypted and unauthenticated by default, the Munin node port is susceptible to eavesdropping and Man-in-the-Middle attacks.
- Attackers who have access to the port could potentially gather sensitive system performance data or exploit plugin vulnerabilities if not properly secured.
- Exposing Munin nodes publicly without access controls increases attack surface.
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Common Mitigations:
- Deploy Munin within trusted internal networks and restrict port 4949 with firewalls or network ACLs.
- Use SSH tunneling or VPNs to encrypt communications between master and nodes.
- Disable unnecessary plugins and keep Munin components updated to avoid exploitation of known vulnerabilities.
- Implement strict access controls and regularly review node exposure to reduce security risks.
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| :3128 | Tatsoft Default HTTP Proxy | TCP | Web Services | caution | 46.8k |
risk mix of the 8 listed
- caution100%
0 of 8 encrypted