Port 4325 (geognosisadmin, geognosisman)

IANA assigns port 4325 to geognosisadmin, geognosisman: Cadcorp GeognoSIS Administrator.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

geognosisadmin TCP Cadcorp GeognoSIS Administrator Computer Aided Development Corporation Ltd -

geognosisman UDP Cadcorp GeognoSIS Administrator Computer Aided Development Corporation Ltd -

Registry dates for this port: last modified 2022-08-12.

Linux: is anything listening on TCP 4325?

sudo ss -tlnp 'sport = :4325'

Linux: UDP 4325

sudo ss -ulnp 'sport = :4325'

Linux / macOS: which process owns the port

sudo lsof -nP -i :4325

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':4325 '

Windows (Command Prompt)

netstat -ano | findstr :4325

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4325 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 4325

From Windows

Test-NetConnection HOST -Port 4325

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 4325

ufw

sudo ufw deny 4325/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 4325 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 4325 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 4325' -Direction Inbound -Protocol TCP -LocalPort 4325 -Action Block

ufw

sudo ufw deny 4325/udp

iptables

sudo iptables -A INPUT -p udp --dport 4325 -j DROP

nftables

sudo nft add rule inet filter input udp dport 4325 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 4325' -Direction Inbound -Protocol UDP -LocalPort 4325 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.