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Port 5150 (atmp)

IANA assigns port 5150 to atmp: Ascend Tunnel Management Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
atmp TCP Ascend Tunnel Management Protocol Kory Hamzeh -
atmp UDP Ascend Tunnel Management Protocol Kory Hamzeh -

Check what is listening on port 5150

Linux: is anything listening on TCP 5150?
sudo ss -tlnp 'sport = :5150'
Linux: UDP 5150
sudo ss -ulnp 'sport = :5150'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5150
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5150 '
Windows (Command Prompt)
netstat -ano | findstr :5150
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5150 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5150
From Windows
Test-NetConnection HOST -Port 5150
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5150

Block port 5150 in the firewall

ufw
sudo ufw deny 5150/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5150 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5150 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5150' -Direction Inbound -Protocol TCP -LocalPort 5150 -Action Block
ufw
sudo ufw deny 5150/udp
iptables
sudo iptables -A INPUT -p udp --dport 5150 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5150 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5150' -Direction Inbound -Protocol UDP -LocalPort 5150 -Action Block

Related ports

5145rmonitor-secure, rmonitor_secure5146social-alarm5151esri-sde, esri_sde5152sde-discovery

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.