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Port 1318 (krb5gatekeeper)

IANA assigns port 1318 to krb5gatekeeper.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
krb5gatekeeper TCP krb5gatekeeper Patrick Moore -
krb5gatekeeper UDP krb5gatekeeper Patrick Moore -

Check what is listening on port 1318

Linux: is anything listening on TCP 1318?
sudo ss -tlnp 'sport = :1318'
Linux: UDP 1318
sudo ss -ulnp 'sport = :1318'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1318
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1318 '
Windows (Command Prompt)
netstat -ano | findstr :1318
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1318 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1318
From Windows
Test-NetConnection HOST -Port 1318
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1318

Block port 1318 in the firewall

ufw
sudo ufw deny 1318/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1318 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1318 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1318' -Direction Inbound -Protocol TCP -LocalPort 1318 -Action Block
ufw
sudo ufw deny 1318/udp
iptables
sudo iptables -A INPUT -p udp --dport 1318 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1318 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1318' -Direction Inbound -Protocol UDP -LocalPort 1318 -Action Block

Related ports

1316exbit-escp1317vrts-ipcserver1319amx-icsp1320amx-axbnet

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