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Port 2778 (gwen-sonya)

IANA assigns port 2778 to gwen-sonya: Gwen-Sonya.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
gwen-sonya TCP Gwen-Sonya Mark Hurst -
gwen-sonya UDP Gwen-Sonya Mark Hurst -

Check what is listening on port 2778

Linux: is anything listening on TCP 2778?
sudo ss -tlnp 'sport = :2778'
Linux: UDP 2778
sudo ss -ulnp 'sport = :2778'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2778
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2778 '
Windows (Command Prompt)
netstat -ano | findstr :2778
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2778 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2778
From Windows
Test-NetConnection HOST -Port 2778
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2778

Block port 2778 in the firewall

ufw
sudo ufw deny 2778/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2778 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2778 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2778' -Direction Inbound -Protocol TCP -LocalPort 2778 -Action Block
ufw
sudo ufw deny 2778/udp
iptables
sudo iptables -A INPUT -p udp --dport 2778 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2778 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2778' -Direction Inbound -Protocol UDP -LocalPort 2778 -Action Block

Related ports

2776ridgeway12777ridgeway22779lbc-sync2780lbc-control

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