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Port 4327 (jaxer-web)

IANA assigns port 4327 to jaxer-web: Jaxer Web Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
jaxer-web TCP Jaxer Web Protocol Uri Sarid -
jaxer-web UDP Jaxer Web Protocol Uri Sarid -

Registry dates for this port: registered 2008-01-07.

Check what is listening on port 4327

Linux: is anything listening on TCP 4327?
sudo ss -tlnp 'sport = :4327'
Linux: UDP 4327
sudo ss -ulnp 'sport = :4327'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4327
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4327 '
Windows (Command Prompt)
netstat -ano | findstr :4327
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4327 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4327
From Windows
Test-NetConnection HOST -Port 4327
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4327

Block port 4327 in the firewall

ufw
sudo ufw deny 4327/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4327 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4327 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4327' -Direction Inbound -Protocol TCP -LocalPort 4327 -Action Block
ufw
sudo ufw deny 4327/udp
iptables
sudo iptables -A INPUT -p udp --dport 4327 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4327 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4327' -Direction Inbound -Protocol UDP -LocalPort 4327 -Action Block

Related ports

4325geognosisadmin, geognosisman4326geognosis4328jaxer-manager4329publiqare-sync

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