Port 4129NuFW authentication protocol

NuFW firewall authentication traffic between the NuFW firewall and its nuauth authentication daemon.

transport: tcp · udp
in transit: encrypted
assignment: official
risk: 3/10
lookups: 0

also known as nuauth

Technical Details

what runs on :4129

The IANA assignment covers both TCP and UDP port 4129. In normal NuFW deployments, nuauth provides the authentication service used by NuFW to associate network connections with authenticated users, with configuration commonly involving TLS certificates and external authentication sources such as PAM or LDAP. The exact transport usage and related listener ports depend on the NuFW version and deployment configuration.

Security Information

exposure of :4129

risk score

3/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

security averages 3.6 across 245 ports — this one sits 0.6 below.

in transit

encrypted

payloads are protected on the wire

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

Port 4129 should generally be restricted to trusted NuFW firewall and authentication hosts, not exposed directly to the public Internet. TLS and authentication help protect the control traffic, but an exposed or vulnerable nuauth service could disclose authentication metadata or allow interference with firewall identity decisions; monitor it for unexpected Internet-facing exposure.

Record

iana registry entry

port: :4129
service: NuFW authentication protocol
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 3/10caution
category: Security Network Services
usage: This port is used by NuFW deployments for communication between the NuFW firewall component and the nuauth authentication daemon. Engineers typically encounter it on internal firewall and authentication infrastructure rather than as a general-purpose user-facing service.
lookups: 0rank 994
added: 2026-08-30
updated: 2026-08-30
references: IANA service name registry — port 4129

Something wrong?

This record is maintained by the engineers who use port 4129. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-08-30.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

3 of 8 encrypted

Port :4129NuFW authentication protocol

Technical Details

Security Information

Related Ports

Port 4129NuFW authentication protocol