Port 3396 (printer-agent, printer_agent)

IANA assigns port 3396 to printer-agent, printer_agent: Printer Agent IANA assigned this well-formed service name as a replacement for "printer_agent"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

printer-agent TCP Printer Agent IANA assigned this well-formed service name as a replacement for "printer_agent". Devon Taylor -

printer_agent TCP Printer Agent
This entry is an alias to "printer-agent". This entry is now historic, not usable for use with many common service discovery mechanisms. Devon Taylor -

printer-agent UDP Printer Agent IANA assigned this well-formed service name as a replacement for "printer_agent". Devon Taylor -

printer_agent UDP Printer Agent
This entry is an alias to "printer-agent". This entry is now historic, not usable for use with many common service discovery mechanisms. Devon Taylor -

Check what is listening on port 3396

Linux: is anything listening on TCP 3396?

sudo ss -tlnp 'sport = :3396'

Linux: UDP 3396

sudo ss -ulnp 'sport = :3396'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3396

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3396 '

Windows (Command Prompt)

netstat -ano | findstr :3396

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3396 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3396

From Windows

Test-NetConnection HOST -Port 3396

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 3396

Block port 3396 in the firewall

ufw

sudo ufw deny 3396/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3396 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3396 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3396' -Direction Inbound -Protocol TCP -LocalPort 3396 -Action Block

ufw

sudo ufw deny 3396/udp