- 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.
Port 8181: Intermapper network management system
Port 8181 is assigned by IANA to intermapper (Intermapper network management system).
8181
How intermapper works
Other servicesThe client sends a request to port 8181 and the intermapper service answers.
- Transport
- TCP
- 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
Is port 8181 dangerous?
We have no specific security note for port 8181. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 8181
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| intermapper | 8181 | TCP | Intermapper network management system | - | 2011-05-09 |
| - | 8181 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 8181, and is it reachable?
Linux
sudo ss -ltnup 'sport = :8181' # process listening on 8181
sudo lsof -nP -i :8181macOS
sudo lsof -nP -i :8181
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8181 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 8181 netstat -ano | findstr :8181
From another machine
nmap -p 8181 -sV <host> nc -zv <host> 8181
Block it in the firewall
sudo ufw deny 8181/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 8181" -Direction Inbound -LocalPort 8181 -Protocol TCP -Action Block # Windows
What is port 8181 used for?
Port 8181 is assigned by IANA to intermapper (Intermapper network management system).
Is port 8181 TCP or UDP?
Port 8181 is registered for TCP.
Is it safe to open port 8181?
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 8181 is open?
On Linux run "ss -ltnup 'sport = :8181'", on macOS "lsof -nP -i :8181", and on Windows "netstat -ano | findstr :8181" to see the local process. From another machine, "nmap -p 8181 <host>" shows whether it is reachable.
Other other services ports
: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