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Port 4033 (sanavigator)

IANA assigns port 4033 to sanavigator: SANavigator Peer Port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sanavigator TCP SANavigator Peer Port Robert J Chansler -
sanavigator UDP SANavigator Peer Port Robert J Chansler -

Check what is listening on port 4033

Linux: is anything listening on TCP 4033?
sudo ss -tlnp 'sport = :4033'
Linux: UDP 4033
sudo ss -ulnp 'sport = :4033'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4033
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4033 '
Windows (Command Prompt)
netstat -ano | findstr :4033
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4033 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4033
From Windows
Test-NetConnection HOST -Port 4033
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4033

Block port 4033 in the firewall

ufw
sudo ufw deny 4033/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4033 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4033 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4033' -Direction Inbound -Protocol TCP -LocalPort 4033 -Action Block
ufw
sudo ufw deny 4033/udp
iptables
sudo iptables -A INPUT -p udp --dport 4033 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4033 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4033' -Direction Inbound -Protocol UDP -LocalPort 4033 -Action Block

Related ports

4031suucp4032vrts-auth-port4034ubxd4035wap-push-http

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