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Port 5500 (fcp-addr-srvr1)

IANA assigns port 5500 to fcp-addr-srvr1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
fcp-addr-srvr1 TCP fcp-addr-srvr1 Ken Wittmer -
fcp-addr-srvr1 UDP fcp-addr-srvr1 Ken Wittmer -

Check what is listening on port 5500

Linux: is anything listening on TCP 5500?
sudo ss -tlnp 'sport = :5500'
Linux: UDP 5500
sudo ss -ulnp 'sport = :5500'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5500
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5500 '
Windows (Command Prompt)
netstat -ano | findstr :5500
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5500 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5500
From Windows
Test-NetConnection HOST -Port 5500
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5500

Block port 5500 in the firewall

ufw
sudo ufw deny 5500/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5500 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5500 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5500' -Direction Inbound -Protocol TCP -LocalPort 5500 -Action Block
ufw
sudo ufw deny 5500/udp
iptables
sudo iptables -A INPUT -p udp --dport 5500 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5500 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5500' -Direction Inbound -Protocol UDP -LocalPort 5500 -Action Block

Related ports

5474apsolab-rpc5475apsolab-data5501fcp-addr-srvr25502fcp-srvr-inst1

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