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Port 2922 (cesdcdtrn)

IANA assigns port 2922 to cesdcdtrn: CESD Contents Delivery Data Transfer.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
cesdcdtrn TCP CESD Contents Delivery Data Transfer Shinya Abe -
cesdcdtrn UDP CESD Contents Delivery Data Transfer Shinya Abe -

Check what is listening on port 2922

Linux: is anything listening on TCP 2922?
sudo ss -tlnp 'sport = :2922'
Linux: UDP 2922
sudo ss -ulnp 'sport = :2922'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2922
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2922 '
Windows (Command Prompt)
netstat -ano | findstr :2922
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2922 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2922
From Windows
Test-NetConnection HOST -Port 2922
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2922

Block port 2922 in the firewall

ufw
sudo ufw deny 2922/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2922 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2922 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2922' -Direction Inbound -Protocol TCP -LocalPort 2922 -Action Block
ufw
sudo ufw deny 2922/udp
iptables
sudo iptables -A INPUT -p udp --dport 2922 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2922 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2922' -Direction Inbound -Protocol UDP -LocalPort 2922 -Action Block

Related ports

2920roboeda2921cesdcdman2923wta-wsp-wtp-s2924precise-vip

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