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Port 3045 (responsenet)

IANA assigns port 3045 to responsenet: ResponseNet.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
responsenet TCP ResponseNet Chul Yoon -
responsenet UDP ResponseNet Chul Yoon -

Check what is listening on port 3045

Linux: is anything listening on TCP 3045?
sudo ss -tlnp 'sport = :3045'
Linux: UDP 3045
sudo ss -ulnp 'sport = :3045'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3045
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3045 '
Windows (Command Prompt)
netstat -ano | findstr :3045
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3045 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3045
From Windows
Test-NetConnection HOST -Port 3045
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3045

Block port 3045 in the firewall

ufw
sudo ufw deny 3045/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3045 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3045 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3045' -Direction Inbound -Protocol TCP -LocalPort 3045 -Action Block
ufw
sudo ufw deny 3045/udp
iptables
sudo iptables -A INPUT -p udp --dport 3045 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3045 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3045' -Direction Inbound -Protocol UDP -LocalPort 3045 -Action Block

Related ports

3043brp3044epp3046di-ase3047hlserver

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