Port 9421MooseFS Master Server
Port 9421 is primarily used by MooseFS, an open-source distributed file system, for communication between its master server and client nodes. It facilitates operations such as metadata queries and namespace management, enabling clients seamless access to the distributed storage resources..
- transport
- tcp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 10,207
single transport
payload readable on path
used by convention
caution
rank 447 of 993 · top 45%
Technical Details
what runs on :9421MooseFS is designed to provide a scalable, fault-tolerant, networked file system, particularly suited for managing large data storage clusters across commodity hardware. The master server controls metadata and orchestrates file operations, while chunk servers handle physical data storage. Port 9421 facilitates communication between the MooseFS Master Server and its clients, allowing clients to query file system metadata such as directory structures, file locations, permissions, and space allocation.
The communication on port 9421 is generally based on a proprietary MooseFS protocol optimized for rapid metadata transactions. This metadata traffic is critical for coordinating distributed file operations and ensuring consistency across multiple clients and servers. The port typically listens on TCP for reliable, ordered delivery, essential for metadata correctness.
MooseFS supports horizontal scaling by adding or removing chunk servers without service interruption. The master server's availability on port 9421 is central because it acts as the sole authority for metadata, and client access heavily depends on this communication channel remaining available and responsive.
Security Information
exposure of :9421risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
databases averages 4.0 across 58 ports — this one sits level with it.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
unofficial
used by convention, not registered — what answers here varies by deployment
reachable over
tcp
every listening transport is another surface to filter at the edge
security overview
Common Vulnerabilities:
- Unencrypted communication on port 9421 can lead to eavesdropping or interception of metadata.
- Exposure of the master server externally may allow unauthorized metadata queries or even manipulation if authentication is weak.
- Misconfiguration can lead to privilege escalation or unauthorized data exposure through metadata.
- Potential denial-of-service attacks if the port is left open on untrusted networks.
Common Mitigations:
- Restrict network access to port 9421 using firewalls, allowing only trusted client subnets.
- Employ MooseFS's built-in authentication and encryption options or encapsulate traffic within VPN tunnels.
- Regularly update MooseFS to patch security vulnerabilities.
- Monitor access logs for unusual activity and throttle or block abusive traffic.
- Do not expose the master server to the internet unless absolutely necessary and protect it with network segmentation and strict access controls.
Related Ports
the 8 most looked-up other ports in databases — 58 ports carry that label.
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| :591 | FileMaker Web Sharing | TCP | Web Services | caution | 23.1k |
| :1521 | Oracle TNS Listener | TCP | Security | caution | 19.6k |
| :21001 | AMLFilter Admin | TCP | Security | caution | 19.2k |
| :18206 | Audition FAM DB | TCPUDP | Databases | caution | 19.1k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted