HTTPfy

Port 5155 (asctrl-agent)

IANA assigns port 5155 to asctrl-agent: Oracle asControl Agent.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
asctrl-agent TCP Oracle asControl Agent Todd Guay -
asctrl-agent UDP Oracle asControl Agent Todd Guay -

Registry dates for this port: registered 2005-08.

Check what is listening on port 5155

Linux: is anything listening on TCP 5155?
sudo ss -tlnp 'sport = :5155'
Linux: UDP 5155
sudo ss -ulnp 'sport = :5155'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5155
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5155 '
Windows (Command Prompt)
netstat -ano | findstr :5155
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5155 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5155
From Windows
Test-NetConnection HOST -Port 5155
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5155

Block port 5155 in the firewall

ufw
sudo ufw deny 5155/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5155 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5155 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5155' -Direction Inbound -Protocol TCP -LocalPort 5155 -Action Block
ufw
sudo ufw deny 5155/udp
iptables
sudo iptables -A INPUT -p udp --dport 5155 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5155 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5155' -Direction Inbound -Protocol UDP -LocalPort 5155 -Action Block

Related ports

5152sde-discovery5154bzflag5156rugameonline5157mediat

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