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Port 2142 (tdmoip)

IANA assigns port 2142 to tdmoip: TDM OVER IP.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tdmoip TCP TDM OVER IP Yaakov Stein RFC 5087
tdmoip UDP TDM OVER IP Yaakov Stein RFC 5087

Registry dates for this port: last modified 2016-09-21.

Check what is listening on port 2142

Linux: is anything listening on TCP 2142?
sudo ss -tlnp 'sport = :2142'
Linux: UDP 2142
sudo ss -ulnp 'sport = :2142'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2142
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2142 '
Windows (Command Prompt)
netstat -ano | findstr :2142
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2142 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2142
From Windows
Test-NetConnection HOST -Port 2142
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2142

Block port 2142 in the firewall

ufw
sudo ufw deny 2142/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2142 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2142 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2142' -Direction Inbound -Protocol TCP -LocalPort 2142 -Action Block
ufw
sudo ufw deny 2142/udp
iptables
sudo iptables -A INPUT -p udp --dport 2142 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2142 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2142' -Direction Inbound -Protocol UDP -LocalPort 2142 -Action Block

Related ports

2140ias-reg2141ias-admind2143lv-jc2144lv-ffx

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