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Port 3810 (wlanauth)

IANA assigns port 3810 to wlanauth: WLAN AS server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wlanauth TCP WLAN AS server Bianling Zhang -
wlanauth UDP WLAN AS server Bianling Zhang -

Registry dates for this port: registered 2004-02.

Check what is listening on port 3810

Linux: is anything listening on TCP 3810?
sudo ss -tlnp 'sport = :3810'
Linux: UDP 3810
sudo ss -ulnp 'sport = :3810'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3810
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3810 '
Windows (Command Prompt)
netstat -ano | findstr :3810
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3810 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3810
From Windows
Test-NetConnection HOST -Port 3810
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3810

Block port 3810 in the firewall

ufw
sudo ufw deny 3810/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3810 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3810 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3810' -Direction Inbound -Protocol TCP -LocalPort 3810 -Action Block
ufw
sudo ufw deny 3810/udp
iptables
sudo iptables -A INPUT -p udp --dport 3810 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3810 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3810' -Direction Inbound -Protocol UDP -LocalPort 3810 -Action Block

Related ports

3808sun-as-iiops-ca3809apocd3811amp3812neto-wol-server

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