HTTPfy

Port 6071 (ssdtp)

IANA assigns port 6071 to ssdtp: SSDTP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ssdtp TCP SSDTP Michael Shearson 2 -
ssdtp UDP SSDTP Michael Shearson 2 -

Check what is listening on port 6071

Linux: is anything listening on TCP 6071?
sudo ss -tlnp 'sport = :6071'
Linux: UDP 6071
sudo ss -ulnp 'sport = :6071'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6071
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6071 '
Windows (Command Prompt)
netstat -ano | findstr :6071
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6071 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6071
From Windows
Test-NetConnection HOST -Port 6071
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6071

Block port 6071 in the firewall

ufw
sudo ufw deny 6071/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6071 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6071 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6071' -Direction Inbound -Protocol TCP -LocalPort 6071 -Action Block
ufw
sudo ufw deny 6071/udp
iptables
sudo iptables -A INPUT -p udp --dport 6071 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6071 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6071' -Direction Inbound -Protocol UDP -LocalPort 6071 -Action Block

Related ports

6069trip6070messageasap6072diagnose-proc6073directplay8

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