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Port 3057 (goahead-fldup)

IANA assigns port 3057 to goahead-fldup: GoAhead FldUp.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
goahead-fldup TCP GoAhead FldUp Alan Pickrell -
goahead-fldup UDP GoAhead FldUp Alan Pickrell -

Check what is listening on port 3057

Linux: is anything listening on TCP 3057?
sudo ss -tlnp 'sport = :3057'
Linux: UDP 3057
sudo ss -ulnp 'sport = :3057'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3057
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3057 '
Windows (Command Prompt)
netstat -ano | findstr :3057
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3057 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3057
From Windows
Test-NetConnection HOST -Port 3057
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3057

Block port 3057 in the firewall

ufw
sudo ufw deny 3057/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3057 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3057 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3057' -Direction Inbound -Protocol TCP -LocalPort 3057 -Action Block
ufw
sudo ufw deny 3057/udp
iptables
sudo iptables -A INPUT -p udp --dport 3057 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3057 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3057' -Direction Inbound -Protocol UDP -LocalPort 3057 -Action Block

Related ports

3055policyserver3056cdl-server3058videobeans3059qsoft

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