Port 2049NFS
Network File System (NFS) is a widely used distributed file system protocol that enables users and applications to access files over a network as if they were on local storage. Port 2049 typically serves as the primary communication channel for NFS over UDP. It facilitates remote file access across heterogeneous systems, centralizing data management and improving collaboration..
- transport
- udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 6,375
single transport
payload readable on path
registered with iana
caution
rank 791 of 993 · top 80%
1 other service is registered on port 2049. compare all 2 →
Technical Details
what runs on :2049Overview:
Network File System (NFS) allows clients to access files on a remote server seamlessly, providing transparent file sharing across a networked environment. Originally developed by Sun Microsystems, NFS has become a cornerstone protocol in UNIX/Linux environments for mounting remote directories.
Protocol Details:
NFS primarily communicates over port 2049, originally over UDP due to its stateless nature, enhancing performance for file access operations. However, newer versions support TCP for improved reliability. The protocol defines a set of RPC (Remote Procedure Call) operations, enabling clients to perform actions such as reading, writing, creating, and deleting files and directories on remote shares.
Versions and Interoperability:
Multiple NFS versions exist—v2, v3, v4—with v4 introducing stateful operations, improved security, and firewall traversal capabilities. NFS is platform-independent, supporting interoperability among various operating systems, including UNIX, Linux, and some Windows implementations via compatible services.
Security Information
exposure of :2049risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
file transfer averages 4.1 across 114 ports — this one sits 0.1 below.
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
udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Unauthorized Access: Without proper exports configuration and access controls, unauthorized users may mount NFS shares.
- Lack of encryption: Classic NFS transmissions are unencrypted, making data susceptible to eavesdropping and interception.
- Man-in-the-Middle Attacks: Attackers can intercept or modify data in transit.
- RPC Exploits: Since NFS relies on RPC, vulnerabilities in portmapper or related services may be exploited.
Common Mitigations:
- Restrict NFS exports with IP-based access controls and root squash options.
- Employ strong authentication mechanisms such as Kerberos (integrated in NFSv4).
- Use network-layer encryption like VPNs or IPsec to protect data in transit.
- Place NFS servers behind firewalls, limiting access to trusted hosts.
- Regularly update and patch NFS daemons and related services to prevent exploitation of known vulnerabilities.
Related Ports
the 8 most looked-up other ports in file transfer — 114 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :17500 | Dropbox LAN Sync | TCPUDP | File Transfer | caution | 43.7k |
| :548 | Apple Filing Protocol | TCP | File Transfer | caution | 36.8k |
| :7000 | Vuze HTTPS Tracker | TCPtls | Security | caution | 28.9k |
| :1337 | PowerFolder P2P | TCP | Security | caution | 27.1k |
| :9001 | SharePoint Authoring | Web Services | caution | 26.3k | |
| :8080 | FilePhile Relay | UDP | File Transfer | caution | 25.6k |
| :1337 | WASTE Encrypted Sharing | TCP | Security | caution | 22.9k |
risk mix of the 8 listed
- caution100%
1 of 8 encrypted