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Port 2053 (lot105-ds-upd)

IANA assigns port 2053 to lot105-ds-upd: Lot105 DSuper Updates.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
lot105-ds-upd TCP Lot105 DSuper Updates Piers Scannell -
lot105-ds-upd UDP Lot105 DSuper Updates Piers Scannell -

Check what is listening on port 2053

Linux: is anything listening on TCP 2053?
sudo ss -tlnp 'sport = :2053'
Linux: UDP 2053
sudo ss -ulnp 'sport = :2053'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2053
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2053 '
Windows (Command Prompt)
netstat -ano | findstr :2053
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2053 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2053
From Windows
Test-NetConnection HOST -Port 2053
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2053

Block port 2053 in the firewall

ufw
sudo ufw deny 2053/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2053 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2053 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2053' -Direction Inbound -Protocol TCP -LocalPort 2053 -Action Block
ufw
sudo ufw deny 2053/udp
iptables
sudo iptables -A INPUT -p udp --dport 2053 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2053 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2053' -Direction Inbound -Protocol UDP -LocalPort 2053 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.