- Patch VPN gateways quickly: they are a top initial access target.
- Use certificates or MFA rather than shared secrets.
- Investigate unexpected tunnels and proxies: they are also attacker tools.
Port 5150: Ascend Tunnel Management Protocol
Port 5150 is assigned by IANA to atmp (Ascend Tunnel Management Protocol).
5150
How atmp works
VPN, tunnels & proxiesTraffic is wrapped in a tunnel between the two ends, so the network in between only sees the tunnel.
- 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
- VPN, tunnels & proxies
Is port 5150 dangerous?
We have no specific security note for port 5150. Its risk depends on the program actually listening on it. General advice for vpn, tunnels & proxies services:
IANA registry entries for port 5150
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| atmp | 5150 | TCP, UDP | Ascend Tunnel Management Protocol | - | - |
// source: IANA service name and port number registry
Which program uses port 5150, and is it reachable?
Linux
sudo ss -ltnup 'sport = :5150' # process listening on 5150
sudo lsof -nP -i :5150macOS
sudo lsof -nP -i :5150
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5150 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 5150 netstat -ano | findstr :5150
From another machine
nmap -p 5150 -sV <host> sudo nmap -sU -p 5150 <host> nc -zv <host> 5150
Block it in the firewall
sudo ufw deny 5150/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 5150" -Direction Inbound -LocalPort 5150 -Protocol TCP -Action Block # Windows
What is port 5150 used for?
Port 5150 is assigned by IANA to atmp (Ascend Tunnel Management Protocol).
Is port 5150 TCP or UDP?
Port 5150 is registered for TCP and UDP.
Is it safe to open port 5150?
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. Patch VPN gateways quickly: they are a top initial access target.
How do I check if port 5150 is open?
On Linux run "ss -ltnup 'sport = :5150'", on macOS "lsof -nP -i :5150", and on Windows "netstat -ano | findstr :5150" to see the local process. From another machine, "nmap -p 5150 <host>" shows whether it is reachable.