- Use strong credentials and TLS for signalling.
- Rate-limit registrations to stop extension scanning and toll fraud.
- Alert on unexpected chat protocols leaving servers (possible command and control).
Port 2031: mobrien-chat
Port 2031 is assigned by IANA to mobrien-chat (mobrien-chat).
2031
How mobrien-chat works
Voice & chatPort 2031 sets up the call (who calls whom), then the voice travels as a stream of audio packets.
- Transport
- TCP · UDP
- 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
- Voice & chat
Is port 2031 dangerous?
We have no specific security note for port 2031. Its risk depends on the program actually listening on it. General advice for voice & chat services:
IANA registry entries for port 2031
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| mobrien-chat | 2031 | TCP, UDP | mobrien-chat | - | 2004-11 |
// source: IANA service name and port number registry
Which program uses port 2031, and is it reachable?
Linux
sudo ss -ltnup 'sport = :2031' # process listening on 2031
sudo lsof -nP -i :2031macOS
sudo lsof -nP -i :2031
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2031 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 2031 netstat -ano | findstr :2031
From another machine
nmap -p 2031 -sV <host> sudo nmap -sU -p 2031 <host> nc -zv <host> 2031
Block it in the firewall
sudo ufw deny 2031/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 2031" -Direction Inbound -LocalPort 2031 -Protocol TCP -Action Block # Windows
What is port 2031 used for?
Port 2031 is assigned by IANA to mobrien-chat (mobrien-chat).
Is port 2031 TCP or UDP?
Port 2031 is registered for TCP and UDP.
Is it safe to open port 2031?
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. Use strong credentials and TLS for signalling.
How do I check if port 2031 is open?
On Linux run "ss -ltnup 'sport = :2031'", on macOS "lsof -nP -i :2031", and on Windows "netstat -ano | findstr :2031" to see the local process. From another machine, "nmap -p 2031 <host>" shows whether it is reachable.