HTTPfy

Port 5455 (apc-5455)

IANA assigns port 5455 to apc-5455: APC 5455.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
apc-5455 TCP APC 5455 American Power Conve -
apc-5455 UDP APC 5455 American Power Conve -

Check what is listening on port 5455

Linux: is anything listening on TCP 5455?
sudo ss -tlnp 'sport = :5455'
Linux: UDP 5455
sudo ss -ulnp 'sport = :5455'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5455
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5455 '
Windows (Command Prompt)
netstat -ano | findstr :5455
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5455 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5455
From Windows
Test-NetConnection HOST -Port 5455
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5455

Block port 5455 in the firewall

ufw
sudo ufw deny 5455/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5455 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5455 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5455' -Direction Inbound -Protocol TCP -LocalPort 5455 -Action Block
ufw
sudo ufw deny 5455/udp
iptables
sudo iptables -A INPUT -p udp --dport 5455 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5455 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5455' -Direction Inbound -Protocol UDP -LocalPort 5455 -Action Block

Related ports

5453surebox5454apc-54545456apc-54565461silkmeter

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