CyberHunter
Local dataset, no network
// Other services

Port 6101: SynchroNet-rtc

Port 6101 is assigned by IANA to synchronet-rtc (SynchroNet-rtc).

6101

How synchronet-rtc works

Other services
client:6101synchronet-rtcresponse client:6101synchronet-rtcresponse

The client sends a request to port 6101 and the synchronet-rtc 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 6101 dangerous?

We have no specific security note for port 6101. 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 6101

ServicePortTransportDescriptionReferenceUpdated
synchronet-rtc 6101 TCP, UDP SynchroNet-rtc - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 6101, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6101'      # process listening on 6101
sudo lsof -nP -i :6101

macOS

sudo lsof -nP -i :6101

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6101 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6101
netstat -ano | findstr :6101

From another machine

nmap -p 6101 -sV <host>
sudo nmap -sU -p 6101 <host>
nc -zv <host> 6101

Block it in the firewall

sudo ufw deny 6101/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6101" -Direction Inbound -LocalPort 6101 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6101 used for?

Port 6101 is assigned by IANA to synchronet-rtc (SynchroNet-rtc).

Is port 6101 TCP or UDP?

Port 6101 is registered for TCP and UDP.

Is it safe to open port 6101?

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 6101 is open?

On Linux run "ss -ltnup 'sport = :6101'", on macOS "lsof -nP -i :6101", and on Windows "netstat -ano | findstr :6101" to see the local process. From another machine, "nmap -p 6101 <host>" shows whether it is reachable.

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