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Port 3345 (influence)

IANA assigns port 3345 to influence: Influence.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
influence TCP Influence Russ Ferriday -
influence UDP Influence Russ Ferriday -

Check what is listening on port 3345

Linux: is anything listening on TCP 3345?
sudo ss -tlnp 'sport = :3345'
Linux: UDP 3345
sudo ss -ulnp 'sport = :3345'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3345
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3345 '
Windows (Command Prompt)
netstat -ano | findstr :3345
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3345 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3345
From Windows
Test-NetConnection HOST -Port 3345
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3345

Block port 3345 in the firewall

ufw
sudo ufw deny 3345/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3345 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3345 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3345' -Direction Inbound -Protocol TCP -LocalPort 3345 -Action Block
ufw
sudo ufw deny 3345/udp
iptables
sudo iptables -A INPUT -p udp --dport 3345 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3345 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3345' -Direction Inbound -Protocol UDP -LocalPort 3345 -Action Block

Related ports

3343ms-cluster-net3344bnt-manager3346trnsprntproxy3347phoenix-rpc

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