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Port 3662 (pserver)

IANA assigns port 3662 to pserver.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pserver TCP pserver Patrick Furlong -
pserver UDP pserver Patrick Furlong -

Registry dates for this port: registered 2003-01.

Check what is listening on port 3662

Linux: is anything listening on TCP 3662?
sudo ss -tlnp 'sport = :3662'
Linux: UDP 3662
sudo ss -ulnp 'sport = :3662'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3662
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3662 '
Windows (Command Prompt)
netstat -ano | findstr :3662
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3662 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3662
From Windows
Test-NetConnection HOST -Port 3662
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3662

Block port 3662 in the firewall

ufw
sudo ufw deny 3662/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3662 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3662 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3662' -Direction Inbound -Protocol TCP -LocalPort 3662 -Action Block
ufw
sudo ufw deny 3662/udp
iptables
sudo iptables -A INPUT -p udp --dport 3662 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3662 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3662' -Direction Inbound -Protocol UDP -LocalPort 3662 -Action Block

Related ports

3660can-nds-ssl3661can-ferret-ssl3663dtp3664ups-engine

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