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Port 3710 (portgate-auth)

IANA assigns port 3710 to portgate-auth: PortGate Authentication.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
portgate-auth TCP PortGate Authentication Scott Harris -
portgate-auth UDP PortGate Authentication Scott Harris -

Registry dates for this port: registered 2003-02.

Check what is listening on port 3710

Linux: is anything listening on TCP 3710?
sudo ss -tlnp 'sport = :3710'
Linux: UDP 3710
sudo ss -ulnp 'sport = :3710'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3710
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3710 '
Windows (Command Prompt)
netstat -ano | findstr :3710
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3710 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3710
From Windows
Test-NetConnection HOST -Port 3710
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3710

Block port 3710 in the firewall

ufw
sudo ufw deny 3710/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3710 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3710 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3710' -Direction Inbound -Protocol TCP -LocalPort 3710 -Action Block
ufw
sudo ufw deny 3710/udp
iptables
sudo iptables -A INPUT -p udp --dport 3710 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3710 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3710' -Direction Inbound -Protocol UDP -LocalPort 3710 -Action Block

Related ports

3708sun-as-iiops3709ca-idms3711edb-server23712sentinel-ent

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