CyberHunter
Local dataset, no network
// Other services

Port 698: OLSR

Port 698 is assigned by IANA to olsr (OLSR).

698

How olsr works

Other services
client:698olsrresponse client:698olsrresponse

The client sends a request to port 698 and the olsr 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 698 dangerous?

We have no specific security note for port 698. 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 698

ServicePortTransportDescriptionReferenceUpdated
olsr 698 TCP, UDP OLSR - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 698, and is it reachable?

Linux

sudo ss -ltnup 'sport = :698'      # process listening on 698
sudo lsof -nP -i :698

macOS

sudo lsof -nP -i :698

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 698 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 698
netstat -ano | findstr :698

From another machine

nmap -p 698 -sV <host>
sudo nmap -sU -p 698 <host>
nc -zv <host> 698

Block it in the firewall

sudo ufw deny 698/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 698" -Direction Inbound -LocalPort 698 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 698 used for?

Port 698 is assigned by IANA to olsr (OLSR).

Is port 698 TCP or UDP?

Port 698 is registered for TCP and UDP.

Is it safe to open port 698?

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 698 is open?

On Linux run "ss -ltnup 'sport = :698'", on macOS "lsof -nP -i :698", and on Windows "netstat -ano | findstr :698" to see the local process. From another machine, "nmap -p 698 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

Latest vulnerability news

All news