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Port 7023 (ct2nmcs)

IANA assigns port 7023 to ct2nmcs: Comtech T2 NMCS.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ct2nmcs TCP Comtech T2 NMCS Bryan Wilcutt -
ct2nmcs UDP Comtech T2 NMCS Bryan Wilcutt -

Registry dates for this port: registered 2005-06.

Check what is listening on port 7023

Linux: is anything listening on TCP 7023?
sudo ss -tlnp 'sport = :7023'
Linux: UDP 7023
sudo ss -ulnp 'sport = :7023'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7023
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7023 '
Windows (Command Prompt)
netstat -ano | findstr :7023
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7023 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7023
From Windows
Test-NetConnection HOST -Port 7023
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7023

Block port 7023 in the firewall

ufw
sudo ufw deny 7023/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7023 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7023 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7023' -Direction Inbound -Protocol TCP -LocalPort 7023 -Action Block
ufw
sudo ufw deny 7023/udp
iptables
sudo iptables -A INPUT -p udp --dport 7023 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7023 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7023' -Direction Inbound -Protocol UDP -LocalPort 7023 -Action Block

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7021dpserveadmin7022ctdp7024vmsvc7025vmsvc-2

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