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Port 3519 (nvmsgd, galileo)

IANA assigns port 3519 to nvmsgd, galileo: Netvion Messenger Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
nvmsgd TCP Netvion Messenger Port - -
galileo UDP Netvion Galileo Port - -

Check what is listening on port 3519

Linux: is anything listening on TCP 3519?
sudo ss -tlnp 'sport = :3519'
Linux: UDP 3519
sudo ss -ulnp 'sport = :3519'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3519
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3519 '
Windows (Command Prompt)
netstat -ano | findstr :3519
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3519 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3519
From Windows
Test-NetConnection HOST -Port 3519
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3519

Block port 3519 in the firewall

ufw
sudo ufw deny 3519/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3519 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3519 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3519' -Direction Inbound -Protocol TCP -LocalPort 3519 -Action Block
ufw
sudo ufw deny 3519/udp
iptables
sudo iptables -A INPUT -p udp --dport 3519 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3519 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3519' -Direction Inbound -Protocol UDP -LocalPort 3519 -Action Block

Related ports

3517802-11-iapp3518artifact-msg3520galileolog3521mc3ss

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