- 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 2905: M3UA
Port 2905 is assigned by IANA to m3ua (M3UA).
2905
How m3ua works
Other servicesThe client sends a request to port 2905 and the m3ua service answers.
- Transport
- TCP · SCTP
- 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 2905 dangerous?
We have no specific security note for port 2905. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 2905
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| m3ua | 2905 | TCP, SCTP | M3UA | RFC 4666 | - |
| - | 2905 | - | De-registered | - | - |
// source: IANA service name and port number registry
Which program uses port 2905, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2905' # process listening on 2905
sudo lsof -nP -i :2905macOS
sudo lsof -nP -i :2905
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2905 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2905 netstat -ano | findstr :2905
From another machine
nmap -p 2905 -sV <host> nc -zv <host> 2905
Block it in the firewall
sudo ufw deny 2905/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2905" -Direction Inbound -LocalPort 2905 -Protocol TCP -Action Block # Windows
What is port 2905 used for?
Port 2905 is assigned by IANA to m3ua (M3UA).
Is port 2905 TCP or UDP?
Port 2905 is registered for TCP and SCTP.
Is it safe to open port 2905?
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 2905 is open?
On Linux run "ss -ltnup 'sport = :2905'", on macOS "lsof -nP -i :2905", and on Windows "netstat -ano | findstr :2905" to see the local process. From another machine, "nmap -p 2905 <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