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// Other services

Port 5101: Talarian_TCP

Port 5101 is assigned by IANA to talarian-tcp (Talarian_TCP), talarian-udp (Talarian_UDP).

5101

How talarian-tcp works

Other services
client:5101talarian-tcpresponse client:5101talarian-tcpresponse

The client sends a request to port 5101 and the talarian-tcp service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 5101 dangerous?

We have no specific security note for port 5101. 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 5101

ServicePortTransportDescriptionReferenceUpdated
talarian-tcp 5101 TCP Talarian_TCP - -
talarian-udp 5101 UDP Talarian_UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5101, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5101'      # process listening on 5101
sudo lsof -nP -i :5101

macOS

sudo lsof -nP -i :5101

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5101 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5101
netstat -ano | findstr :5101

From another machine

nmap -p 5101 -sV <host>
sudo nmap -sU -p 5101 <host>
nc -zv <host> 5101

Block it in the firewall

sudo ufw deny 5101/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5101" -Direction Inbound -LocalPort 5101 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5101 used for?

Port 5101 is assigned by IANA to talarian-tcp (Talarian_TCP), talarian-udp (Talarian_UDP).

Is port 5101 TCP or UDP?

Port 5101 is registered for TCP and UDP.

Is it safe to open port 5101?

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 5101 is open?

On Linux run "ss -ltnup 'sport = :5101'", on macOS "lsof -nP -i :5101", and on Windows "netstat -ano | findstr :5101" to see the local process. From another machine, "nmap -p 5101 <host>" shows whether it is reachable.

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