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Port 2177 (qwave)

IANA assigns port 2177 to qwave: qWAVE Bandwidth Estimate.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
qwave TCP qWAVE Bandwidth Estimate Gabe Frost -
qwave UDP qWAVE Bandwidth Estimate Gabe Frost -

Registry dates for this port: registered 2005-08.

Check what is listening on port 2177

Linux: is anything listening on TCP 2177?
sudo ss -tlnp 'sport = :2177'
Linux: UDP 2177
sudo ss -ulnp 'sport = :2177'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2177
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2177 '
Windows (Command Prompt)
netstat -ano | findstr :2177
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2177 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2177
From Windows
Test-NetConnection HOST -Port 2177
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2177

Block port 2177 in the firewall

ufw
sudo ufw deny 2177/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2177 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2177 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2177' -Direction Inbound -Protocol TCP -LocalPort 2177 -Action Block
ufw
sudo ufw deny 2177/udp
iptables
sudo iptables -A INPUT -p udp --dport 2177 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2177 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2177' -Direction Inbound -Protocol UDP -LocalPort 2177 -Action Block

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