CyberHunter
Local dataset, no network
// Other services

Port 2701: SMS RCINFO

Port 2701 is assigned by IANA to sms-rcinfo (SMS RCINFO).

2701

How sms-rcinfo works

Other services
client:2701sms-rcinforesponse client:2701sms-rcinforesponse

The client sends a request to port 2701 and the sms-rcinfo 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 2701 dangerous?

We have no specific security note for port 2701. 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 2701

ServicePortTransportDescriptionReferenceUpdated
sms-rcinfo 2701 TCP, UDP SMS RCINFO - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2701, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2701'      # process listening on 2701
sudo lsof -nP -i :2701

macOS

sudo lsof -nP -i :2701

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2701 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2701
netstat -ano | findstr :2701

From another machine

nmap -p 2701 -sV <host>
sudo nmap -sU -p 2701 <host>
nc -zv <host> 2701

Block it in the firewall

sudo ufw deny 2701/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2701" -Direction Inbound -LocalPort 2701 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2701 used for?

Port 2701 is assigned by IANA to sms-rcinfo (SMS RCINFO).

Is port 2701 TCP or UDP?

Port 2701 is registered for TCP and UDP.

Is it safe to open port 2701?

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 2701 is open?

On Linux run "ss -ltnup 'sport = :2701'", on macOS "lsof -nP -i :2701", and on Windows "netstat -ano | findstr :2701" to see the local process. From another machine, "nmap -p 2701 <host>" shows whether it is reachable.

05 Related
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