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// Other services

Port 2549: IPASS

Port 2549 is assigned by IANA to ipass (IPASS).

2549

How ipass works

Other services
client:2549ipassresponse client:2549ipassresponse

The client sends a request to port 2549 and the ipass 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 2549 dangerous?

We have no specific security note for port 2549. 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 2549

ServicePortTransportDescriptionReferenceUpdated
ipass 2549 TCP, UDP IPASS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2549, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2549'      # process listening on 2549
sudo lsof -nP -i :2549

macOS

sudo lsof -nP -i :2549

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2549 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2549
netstat -ano | findstr :2549

From another machine

nmap -p 2549 -sV <host>
sudo nmap -sU -p 2549 <host>
nc -zv <host> 2549

Block it in the firewall

sudo ufw deny 2549/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2549" -Direction Inbound -LocalPort 2549 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2549 used for?

Port 2549 is assigned by IANA to ipass (IPASS).

Is port 2549 TCP or UDP?

Port 2549 is registered for TCP and UDP.

Is it safe to open port 2549?

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 2549 is open?

On Linux run "ss -ltnup 'sport = :2549'", on macOS "lsof -nP -i :2549", and on Windows "netstat -ano | findstr :2549" to see the local process. From another machine, "nmap -p 2549 <host>" shows whether it is reachable.

05 Related
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