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Port 2923 (wta-wsp-wtp-s)

IANA assigns port 2923 to wta-wsp-wtp-s: WTA-WSP-WTP-S.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
wta-wsp-wtp-s TCP WTA-WSP-WTP-S Sebastien Bury -
wta-wsp-wtp-s UDP WTA-WSP-WTP-S Sebastien Bury -

Check what is listening on port 2923

Linux: is anything listening on TCP 2923?
sudo ss -tlnp 'sport = :2923'
Linux: UDP 2923
sudo ss -ulnp 'sport = :2923'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2923
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2923 '
Windows (Command Prompt)
netstat -ano | findstr :2923
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2923 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2923
From Windows
Test-NetConnection HOST -Port 2923
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2923

Block port 2923 in the firewall

ufw
sudo ufw deny 2923/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2923 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2923 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2923' -Direction Inbound -Protocol TCP -LocalPort 2923 -Action Block
ufw
sudo ufw deny 2923/udp
iptables
sudo iptables -A INPUT -p udp --dport 2923 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2923 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2923' -Direction Inbound -Protocol UDP -LocalPort 2923 -Action Block

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