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Port 634 (ginad)

IANA assigns port 634 to ginad.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ginad TCP ginad Mark Crother -
ginad UDP ginad Mark Crother -

Check what is listening on port 634

Linux: is anything listening on TCP 634?
sudo ss -tlnp 'sport = :634'
Linux: UDP 634
sudo ss -ulnp 'sport = :634'
Linux / macOS: which process owns the port
sudo lsof -nP -i :634
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':634 '
Windows (Command Prompt)
netstat -ano | findstr :634
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 634 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 634
From Windows
Test-NetConnection HOST -Port 634
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 634

Block port 634 in the firewall

ufw
sudo ufw deny 634/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 634 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 634 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 634' -Direction Inbound -Protocol TCP -LocalPort 634 -Action Block
ufw
sudo ufw deny 634/udp
iptables
sudo iptables -A INPUT -p udp --dport 634 -j DROP
nftables
sudo nft add rule inet filter input udp dport 634 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 634' -Direction Inbound -Protocol UDP -LocalPort 634 -Action Block

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