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Port 3177 (phonex-port)

IANA assigns port 3177 to phonex-port: Phonex Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
phonex-port TCP Phonex Protocol Doug Grover -
phonex-port UDP Phonex Protocol Doug Grover -

Check what is listening on port 3177

Linux: is anything listening on TCP 3177?
sudo ss -tlnp 'sport = :3177'
Linux: UDP 3177
sudo ss -ulnp 'sport = :3177'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3177
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3177 '
Windows (Command Prompt)
netstat -ano | findstr :3177
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3177 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3177
From Windows
Test-NetConnection HOST -Port 3177
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3177

Block port 3177 in the firewall

ufw
sudo ufw deny 3177/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3177 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3177 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3177' -Direction Inbound -Protocol TCP -LocalPort 3177 -Action Block
ufw
sudo ufw deny 3177/udp
iptables
sudo iptables -A INPUT -p udp --dport 3177 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3177 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3177' -Direction Inbound -Protocol UDP -LocalPort 3177 -Action Block

Related ports

3175t1-e1-over-ip3176ars-master3178radclientport3179h2gf-w-2m

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