- 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 4553: ICS host services
Port 4553 is assigned by IANA to icshostsvc (ICS host services).
4553
How icshostsvc works
Other servicesThe client sends a request to port 4553 and the icshostsvc 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 4553 dangerous?
We have no specific security note for port 4553. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 4553
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| icshostsvc | 4553 | TCP | ICS host services | - | 2009-09-23 |
| - | 4553 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 4553, and is it reachable?
Linux
sudo ss -ltnup 'sport = :4553' # process listening on 4553
sudo lsof -nP -i :4553macOS
sudo lsof -nP -i :4553
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4553 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 4553 netstat -ano | findstr :4553
From another machine
nmap -p 4553 -sV <host> nc -zv <host> 4553
Block it in the firewall
sudo ufw deny 4553/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 4553" -Direction Inbound -LocalPort 4553 -Protocol TCP -Action Block # Windows
What is port 4553 used for?
Port 4553 is assigned by IANA to icshostsvc (ICS host services).
Is port 4553 TCP or UDP?
Port 4553 is registered for TCP.
Is it safe to open port 4553?
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 4553 is open?
On Linux run "ss -ltnup 'sport = :4553'", on macOS "lsof -nP -i :4553", and on Windows "netstat -ano | findstr :4553" to see the local process. From another machine, "nmap -p 4553 <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