HTTPfy

Port 1052 (ddt)

IANA assigns port 1052 to ddt: Dynamic DNS Tools.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ddt TCP Dynamic DNS Tools Remi Lefebvre -
ddt UDP Dynamic DNS Tools Remi Lefebvre -

Check what is listening on port 1052

Linux: is anything listening on TCP 1052?
sudo ss -tlnp 'sport = :1052'
Linux: UDP 1052
sudo ss -ulnp 'sport = :1052'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1052
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1052 '
Windows (Command Prompt)
netstat -ano | findstr :1052
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1052 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1052
From Windows
Test-NetConnection HOST -Port 1052
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1052

Block port 1052 in the firewall

ufw
sudo ufw deny 1052/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1052 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1052 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1052' -Direction Inbound -Protocol TCP -LocalPort 1052 -Action Block
ufw
sudo ufw deny 1052/udp
iptables
sudo iptables -A INPUT -p udp --dport 1052 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1052 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1052' -Direction Inbound -Protocol UDP -LocalPort 1052 -Action Block

Related ports

1050cma1051optima-vnet1053remote-as1054brvread

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