HTTPfy

Port 3853 (sscan)

IANA assigns port 3853 to sscan: SONY scanning protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sscan TCP SONY scanning protocol Takashi Aihara -
sscan UDP SONY scanning protocol Takashi Aihara -

Registry dates for this port: registered 2003-08.

Check what is listening on port 3853

Linux: is anything listening on TCP 3853?
sudo ss -tlnp 'sport = :3853'
Linux: UDP 3853
sudo ss -ulnp 'sport = :3853'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3853
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3853 '
Windows (Command Prompt)
netstat -ano | findstr :3853
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3853 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3853
From Windows
Test-NetConnection HOST -Port 3853
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3853

Block port 3853 in the firewall

ufw
sudo ufw deny 3853/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3853 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3853 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3853' -Direction Inbound -Protocol TCP -LocalPort 3853 -Action Block
ufw
sudo ufw deny 3853/udp
iptables
sudo iptables -A INPUT -p udp --dport 3853 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3853 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3853' -Direction Inbound -Protocol UDP -LocalPort 3853 -Action Block

Related ports

3851spectraport3852sse-app-config3854stryker-com3855opentrac

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