HTTPfy

Port 1155 (nfa)

IANA assigns port 1155 to nfa: Network File Access.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nfa TCP Network File Access James Powell -
nfa UDP Network File Access James Powell -

Check what is listening on port 1155

Linux: is anything listening on TCP 1155?
sudo ss -tlnp 'sport = :1155'
Linux: UDP 1155
sudo ss -ulnp 'sport = :1155'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1155
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1155 '
Windows (Command Prompt)
netstat -ano | findstr :1155
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1155 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1155
From Windows
Test-NetConnection HOST -Port 1155
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1155

Block port 1155 in the firewall

ufw
sudo ufw deny 1155/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1155 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1155 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1155' -Direction Inbound -Protocol TCP -LocalPort 1155 -Action Block
ufw
sudo ufw deny 1155/udp
iptables
sudo iptables -A INPUT -p udp --dport 1155 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1155 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1155' -Direction Inbound -Protocol UDP -LocalPort 1155 -Action Block

Related ports

1153c1222-acse1154resacommunity1156iascontrol-oms1157iascontrol

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