CyberHunter
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// Other services

Port 268: Tobit David Replica

Port 268 is assigned by IANA to td-replica (Tobit David Replica).

268

How td-replica works

Other services
client:268td-replicaresponse client:268td-replicaresponse

The client sends a request to port 268 and the td-replica 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 268 dangerous?

We have no specific security note for port 268. 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 268

ServicePortTransportDescriptionReferenceUpdated
td-replica 268 TCP, UDP Tobit David Replica - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 268, and is it reachable?

Linux

sudo ss -ltnup 'sport = :268'      # process listening on 268
sudo lsof -nP -i :268

macOS

sudo lsof -nP -i :268

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 268 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 268
netstat -ano | findstr :268

From another machine

nmap -p 268 -sV <host>
sudo nmap -sU -p 268 <host>
nc -zv <host> 268

Block it in the firewall

sudo ufw deny 268/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 268" -Direction Inbound -LocalPort 268 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 268 used for?

Port 268 is assigned by IANA to td-replica (Tobit David Replica).

Is port 268 TCP or UDP?

Port 268 is registered for TCP and UDP.

Is it safe to open port 268?

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 268 is open?

On Linux run "ss -ltnup 'sport = :268'", on macOS "lsof -nP -i :268", and on Windows "netstat -ano | findstr :268" to see the local process. From another machine, "nmap -p 268 <host>" shows whether it is reachable.

05 Related
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