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Port 5553 (sgi-eventmond)

IANA assigns port 5553 to sgi-eventmond: SGI Eventmond Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sgi-eventmond TCP SGI Eventmond Port Andrei Vilkotski -
sgi-eventmond UDP SGI Eventmond Port Andrei Vilkotski -

Registry dates for this port: registered 2003-06.

Check what is listening on port 5553

Linux: is anything listening on TCP 5553?
sudo ss -tlnp 'sport = :5553'
Linux: UDP 5553
sudo ss -ulnp 'sport = :5553'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5553
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5553 '
Windows (Command Prompt)
netstat -ano | findstr :5553
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5553 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5553
From Windows
Test-NetConnection HOST -Port 5553
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5553

Block port 5553 in the firewall

ufw
sudo ufw deny 5553/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5553 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5553 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5553' -Direction Inbound -Protocol TCP -LocalPort 5553 -Action Block
ufw
sudo ufw deny 5553/udp
iptables
sudo iptables -A INPUT -p udp --dport 5553 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5553 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5553' -Direction Inbound -Protocol UDP -LocalPort 5553 -Action Block

Related ports

5543qftest-lic-mcp5550cbus5554sgi-esphttp5555Android Debug Bridge (ADB)

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