- 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 5004: RTP media data
Port 5004 is assigned by IANA to avt-profile-1 (RTP media data).
5004
How avt-profile-1 works
Voice & chatPort 5004 sets up the call (who calls whom), then the voice travels as a stream of audio packets.
- Transport
- TCP · UDP · DCCP
- 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 5004 dangerous?
We have no specific security note for port 5004. Its risk depends on the program actually listening on it. General advice for voice & chat services:
IANA registry entries for port 5004
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| avt-profile-1 | 5004 | TCP, UDP, DCCP | RTP media data | RFC 3551, RFC 4571 | - |
// source: IANA service name and port number registry
Which program uses port 5004, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5004' # process listening on 5004
sudo lsof -nP -i :5004macOS
sudo lsof -nP -i :5004
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5004 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5004 netstat -ano | findstr :5004
From another machine
nmap -p 5004 -sV <host> sudo nmap -sU -p 5004 <host> nc -zv <host> 5004
Block it in the firewall
sudo ufw deny 5004/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5004" -Direction Inbound -LocalPort 5004 -Protocol TCP -Action Block # Windows
What is port 5004 used for?
Port 5004 is assigned by IANA to avt-profile-1 (RTP media data).
Is port 5004 TCP or UDP?
Port 5004 is registered for TCP and UDP and DCCP.
Is it safe to open port 5004?
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 5004 is open?
On Linux run "ss -ltnup 'sport = :5004'", on macOS "lsof -nP -i :5004", and on Windows "netstat -ano | findstr :5004" to see the local process. From another machine, "nmap -p 5004 <host>" shows whether it is reachable.