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Port 3283 (net-assistant)

IANA assigns port 3283 to net-assistant: Net Assistant.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
net-assistant TCP Net Assistant Michael Stein -
net-assistant UDP Net Assistant Michael Stein -

Registry dates for this port: last modified 2025-01-23.

Check what is listening on port 3283

Linux: is anything listening on TCP 3283?
sudo ss -tlnp 'sport = :3283'
Linux: UDP 3283
sudo ss -ulnp 'sport = :3283'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3283
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3283 '
Windows (Command Prompt)
netstat -ano | findstr :3283
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3283 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3283
From Windows
Test-NetConnection HOST -Port 3283
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3283

Block port 3283 in the firewall

ufw
sudo ufw deny 3283/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3283 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3283 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3283' -Direction Inbound -Protocol TCP -LocalPort 3283 -Action Block
ufw
sudo ufw deny 3283/udp
iptables
sudo iptables -A INPUT -p udp --dport 3283 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3283 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3283' -Direction Inbound -Protocol UDP -LocalPort 3283 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.