CyberHunter
Local dataset, no network
// Other services

Port 4454: NSS Agent Manager

Port 4454 is assigned by IANA to nssagentmgr (NSS Agent Manager).

4454

How nssagentmgr works

Other services
client:4454nssagentmgrresponse client:4454nssagentmgrresponse

The client sends a request to port 4454 and the nssagentmgr service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 4454 dangerous?

We have no specific security note for port 4454. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 4454

ServicePortTransportDescriptionReferenceUpdated
nssagentmgr 4454 TCP, UDP NSS Agent Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 4454, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4454'      # process listening on 4454
sudo lsof -nP -i :4454

macOS

sudo lsof -nP -i :4454

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4454 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4454
netstat -ano | findstr :4454

From another machine

nmap -p 4454 -sV <host>
sudo nmap -sU -p 4454 <host>
nc -zv <host> 4454

Block it in the firewall

sudo ufw deny 4454/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4454" -Direction Inbound -LocalPort 4454 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4454 used for?

Port 4454 is assigned by IANA to nssagentmgr (NSS Agent Manager).

Is port 4454 TCP or UDP?

Port 4454 is registered for TCP and UDP.

Is it safe to open port 4454?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 4454 is open?

On Linux run "ss -ltnup 'sport = :4454'", on macOS "lsof -nP -i :4454", and on Windows "netstat -ano | findstr :4454" to see the local process. From another machine, "nmap -p 4454 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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