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Port 1613 (netbill-keyrep)

IANA assigns port 1613 to netbill-keyrep: NetBill Key Repository.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
netbill-keyrep TCP NetBill Key Repository - -
netbill-keyrep UDP NetBill Key Repository - -

Check what is listening on port 1613

Linux: is anything listening on TCP 1613?
sudo ss -tlnp 'sport = :1613'
Linux: UDP 1613
sudo ss -ulnp 'sport = :1613'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1613
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1613 '
Windows (Command Prompt)
netstat -ano | findstr :1613
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1613 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1613
From Windows
Test-NetConnection HOST -Port 1613
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1613

Block port 1613 in the firewall

ufw
sudo ufw deny 1613/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1613 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1613 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1613' -Direction Inbound -Protocol TCP -LocalPort 1613 -Action Block
ufw
sudo ufw deny 1613/udp
iptables
sudo iptables -A INPUT -p udp --dport 1613 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1613 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1613' -Direction Inbound -Protocol UDP -LocalPort 1613 -Action Block

Related ports

1611ill1612netbill-trans1614netbill-cred1615netbill-auth

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