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// Other services

Port 2797: esp-encap

Port 2797 is assigned by IANA to esp-encap (esp-encap).

2797

How esp-encap works

Other services
client:2797esp-encapresponse client:2797esp-encapresponse

The client sends a request to port 2797 and the esp-encap 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 2797 dangerous?

We have no specific security note for port 2797. 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 2797

ServicePortTransportDescriptionReferenceUpdated
esp-encap 2797 TCP, UDP esp-encap - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2797, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2797'      # process listening on 2797
sudo lsof -nP -i :2797

macOS

sudo lsof -nP -i :2797

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2797 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2797
netstat -ano | findstr :2797

From another machine

nmap -p 2797 -sV <host>
sudo nmap -sU -p 2797 <host>
nc -zv <host> 2797

Block it in the firewall

sudo ufw deny 2797/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2797" -Direction Inbound -LocalPort 2797 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2797 used for?

Port 2797 is assigned by IANA to esp-encap (esp-encap).

Is port 2797 TCP or UDP?

Port 2797 is registered for TCP and UDP.

Is it safe to open port 2797?

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 2797 is open?

On Linux run "ss -ltnup 'sport = :2797'", on macOS "lsof -nP -i :2797", and on Windows "netstat -ano | findstr :2797" to see the local process. From another machine, "nmap -p 2797 <host>" shows whether it is reachable.

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