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Port 3053 (dsom-server)

IANA assigns port 3053 to dsom-server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dsom-server TCP dsom-server Daniel Sisk -
dsom-server UDP dsom-server Daniel Sisk -

Check what is listening on port 3053

Linux: is anything listening on TCP 3053?
sudo ss -tlnp 'sport = :3053'
Linux: UDP 3053
sudo ss -ulnp 'sport = :3053'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3053
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3053 '
Windows (Command Prompt)
netstat -ano | findstr :3053
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3053 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3053
From Windows
Test-NetConnection HOST -Port 3053
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3053

Block port 3053 in the firewall

ufw
sudo ufw deny 3053/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3053 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3053 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3053' -Direction Inbound -Protocol TCP -LocalPort 3053 -Action Block
ufw
sudo ufw deny 3053/udp
iptables
sudo iptables -A INPUT -p udp --dport 3053 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3053 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3053' -Direction Inbound -Protocol UDP -LocalPort 3053 -Action Block

Related ports

3051galaxy-server3052apc-30523054amt-cnf-prot3055policyserver

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