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Port 2576 (tclprodebugger)

IANA assigns port 2576 to tclprodebugger: TCL Pro Debugger.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tclprodebugger TCP TCL Pro Debugger - -
tclprodebugger UDP TCL Pro Debugger - -

Check what is listening on port 2576

Linux: is anything listening on TCP 2576?
sudo ss -tlnp 'sport = :2576'
Linux: UDP 2576
sudo ss -ulnp 'sport = :2576'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2576
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2576 '
Windows (Command Prompt)
netstat -ano | findstr :2576
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2576 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2576
From Windows
Test-NetConnection HOST -Port 2576
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2576

Block port 2576 in the firewall

ufw
sudo ufw deny 2576/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2576 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2576 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2576' -Direction Inbound -Protocol TCP -LocalPort 2576 -Action Block
ufw
sudo ufw deny 2576/udp
iptables
sudo iptables -A INPUT -p udp --dport 2576 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2576 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2576' -Direction Inbound -Protocol UDP -LocalPort 2576 -Action Block

Related ports

2574blockade-bpsp2575hl72577scipticslsrvr2578rvs-isdn-dcp

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