HTTPfy

Port 3285 (plato)

IANA assigns port 3285 to plato: Plato.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
plato TCP Plato Jim Battin -
plato UDP Plato Jim Battin -

Check what is listening on port 3285

Linux: is anything listening on TCP 3285?
sudo ss -tlnp 'sport = :3285'
Linux: UDP 3285
sudo ss -ulnp 'sport = :3285'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3285
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3285 '
Windows (Command Prompt)
netstat -ano | findstr :3285
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3285 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3285
From Windows
Test-NetConnection HOST -Port 3285
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3285

Block port 3285 in the firewall

ufw
sudo ufw deny 3285/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3285 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3285 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3285' -Direction Inbound -Protocol TCP -LocalPort 3285 -Action Block
ufw
sudo ufw deny 3285/udp
iptables
sudo iptables -A INPUT -p udp --dport 3285 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3285 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3285' -Direction Inbound -Protocol UDP -LocalPort 3285 -Action Block

Related ports

3283net-assistant32844talk3286e-net3287directvdata

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