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// Network services

Port 3613: Alaris Device Discovery

Port 3613 is assigned by IANA to alaris-disc (Alaris Device Discovery).

3613

How alaris-disc works

Network services
client:3613alaris-discresponse client:3613alaris-discresponse

The client sends a request to port 3613 and the alaris-disc 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
Network services
01 Security

Is port 3613 dangerous?

We have no specific security note for port 3613. Its risk depends on the program actually listening on it. General advice for network services services:

  • Answer only the networks that need the service (no open resolvers, relays or reflectors).
  • UDP services can be abused for DDoS amplification: rate-limit or block them at the edge.
  • Disable legacy test services that have no use in production.
02 Registry

IANA registry entries for port 3613

ServicePortTransportDescriptionReferenceUpdated
alaris-disc 3613 TCP, UDP Alaris Device Discovery - 2004-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 3613, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3613'      # process listening on 3613
sudo lsof -nP -i :3613

macOS

sudo lsof -nP -i :3613

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3613 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3613
netstat -ano | findstr :3613

From another machine

nmap -p 3613 -sV <host>
sudo nmap -sU -p 3613 <host>
nc -zv <host> 3613

Block it in the firewall

sudo ufw deny 3613/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3613" -Direction Inbound -LocalPort 3613 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3613 used for?

Port 3613 is assigned by IANA to alaris-disc (Alaris Device Discovery).

Is port 3613 TCP or UDP?

Port 3613 is registered for TCP and UDP.

Is it safe to open port 3613?

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. Answer only the networks that need the service (no open resolvers, relays or reflectors).

How do I check if port 3613 is open?

On Linux run "ss -ltnup 'sport = :3613'", on macOS "lsof -nP -i :3613", and on Windows "netstat -ano | findstr :3613" to see the local process. From another machine, "nmap -p 3613 <host>" shows whether it is reachable.

05 Related
:53 DNS tcp · udp · moderate risk :135 MS RPC tcp · udp · high risk :123 NTP udp · tcp · moderate risk :67 DHCP server udp · tcp · moderate risk :111 rpcbind tcp · udp · high risk :9100 Raw printing (JetDirect) tcp · udp · high risk :631 IPP / CUPS tcp · udp · high risk :5353 mDNS udp · tcp · moderate risk

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