- 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 456: macon-tcp
Port 456 is assigned by IANA to macon-tcp (macon-tcp), macon-udp (macon-udp).
456
How macon-tcp works
Other servicesThe client sends a request to port 456 and the macon-tcp service answers.
- Transport
- TCP · UDP
- Exposure risk
- not rated depends on the program listening
- Encryption
- Unknownnot stated by the registry
- IANA status
- Assigned2 registered services
- Range
- Well-known (0-1023)
- Category
- Other services
Is port 456 dangerous?
We have no specific security note for port 456. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 456
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| macon-tcp | 456 | TCP | macon-tcp | - | - |
| macon-udp | 456 | UDP | macon-udp | - | - |
// source: IANA service name and port number registry
Which program uses port 456, and is it reachable?
Linux
sudo ss -ltnup 'sport = :456' # process listening on 456
sudo lsof -nP -i :456macOS
sudo lsof -nP -i :456
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 456 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 456 netstat -ano | findstr :456
From another machine
nmap -p 456 -sV <host> sudo nmap -sU -p 456 <host> nc -zv <host> 456
Block it in the firewall
sudo ufw deny 456/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 456" -Direction Inbound -LocalPort 456 -Protocol TCP -Action Block # Windows
What is port 456 used for?
Port 456 is assigned by IANA to macon-tcp (macon-tcp), macon-udp (macon-udp).
Is port 456 TCP or UDP?
Port 456 is registered for TCP and UDP.
Is it safe to open port 456?
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 456 is open?
On Linux run "ss -ltnup 'sport = :456'", on macOS "lsof -nP -i :456", and on Windows "netstat -ano | findstr :456" to see the local process. From another machine, "nmap -p 456 <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