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// Other services

Port 8377: Cruise SWROUTE

Port 8377 is assigned by IANA to cruise-swroute (Cruise SWROUTE).

8377

How cruise-swroute works

Other services
client:8377cruise-swrouteresponse client:8377cruise-swrouteresponse

The client sends a request to port 8377 and the cruise-swroute 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 8377 dangerous?

We have no specific security note for port 8377. 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 8377

ServicePortTransportDescriptionReferenceUpdated
cruise-swroute 8377 TCP, UDP Cruise SWROUTE - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 8377, and is it reachable?

Linux

sudo ss -ltnup 'sport = :8377'      # process listening on 8377
sudo lsof -nP -i :8377

macOS

sudo lsof -nP -i :8377

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8377 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 8377
netstat -ano | findstr :8377

From another machine

nmap -p 8377 -sV <host>
sudo nmap -sU -p 8377 <host>
nc -zv <host> 8377

Block it in the firewall

sudo ufw deny 8377/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 8377" -Direction Inbound -LocalPort 8377 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 8377 used for?

Port 8377 is assigned by IANA to cruise-swroute (Cruise SWROUTE).

Is port 8377 TCP or UDP?

Port 8377 is registered for TCP and UDP.

Is it safe to open port 8377?

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 8377 is open?

On Linux run "ss -ltnup 'sport = :8377'", on macOS "lsof -nP -i :8377", and on Windows "netstat -ano | findstr :8377" to see the local process. From another machine, "nmap -p 8377 <host>" shows whether it is reachable.

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