CyberHunter
Local dataset, no network
// Other services

Port 7998: USI Content Push Service

Port 7998 is assigned by IANA to usicontentpush (USI Content Push Service).

7998

How usicontentpush works

Other services
client:7998usicontentpushresponse client:7998usicontentpushresponse

The client sends a request to port 7998 and the usicontentpush service answers.

Transport
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 7998 dangerous?

We have no specific security note for port 7998. 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 7998

ServicePortTransportDescriptionReferenceUpdated
usicontentpush 7998 UDP USI Content Push Service - 2009-08-10
-7998-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 7998, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7998'      # process listening on 7998
sudo lsof -nP -i :7998

macOS

sudo lsof -nP -i :7998

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7998 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7998
netstat -ano | findstr :7998

From another machine

nmap -p 7998 -sV <host>
sudo nmap -sU -p 7998 <host>
nc -zv <host> 7998

Block it in the firewall

sudo ufw deny 7998/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7998" -Direction Inbound -LocalPort 7998 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 7998 used for?

Port 7998 is assigned by IANA to usicontentpush (USI Content Push Service).

Is port 7998 TCP or UDP?

Port 7998 is registered for UDP.

Is it safe to open port 7998?

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 7998 is open?

On Linux run "ss -ltnup 'sport = :7998'", on macOS "lsof -nP -i :7998", and on Windows "netstat -ano | findstr :7998" to see the local process. From another machine, "nmap -p 7998 <host>" shows whether it is reachable.

05 Related
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