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Port 1177 (dkmessenger)

IANA assigns port 1177 to dkmessenger: DKMessenger Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dkmessenger TCP DKMessenger Protocol Douglas Kadlecek -
dkmessenger UDP DKMessenger Protocol Douglas Kadlecek -

Registry dates for this port: registered 2004-11.

Check what is listening on port 1177

Linux: is anything listening on TCP 1177?
sudo ss -tlnp 'sport = :1177'
Linux: UDP 1177
sudo ss -ulnp 'sport = :1177'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1177
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1177 '
Windows (Command Prompt)
netstat -ano | findstr :1177
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1177 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1177
From Windows
Test-NetConnection HOST -Port 1177
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1177

Block port 1177 in the firewall

ufw
sudo ufw deny 1177/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1177 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1177 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1177' -Direction Inbound -Protocol TCP -LocalPort 1177 -Action Block
ufw
sudo ufw deny 1177/udp
iptables
sudo iptables -A INPUT -p udp --dport 1177 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1177 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1177' -Direction Inbound -Protocol UDP -LocalPort 1177 -Action Block

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