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Port 2140 (ias-reg)

IANA assigns port 2140 to ias-reg: IAS-REG.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ias-reg TCP IAS-REG - -
ias-reg UDP IAS-REG - -

Check what is listening on port 2140

Linux: is anything listening on TCP 2140?
sudo ss -tlnp 'sport = :2140'
Linux: UDP 2140
sudo ss -ulnp 'sport = :2140'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2140
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2140 '
Windows (Command Prompt)
netstat -ano | findstr :2140
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2140 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2140
From Windows
Test-NetConnection HOST -Port 2140
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2140

Block port 2140 in the firewall

ufw
sudo ufw deny 2140/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2140 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2140 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2140' -Direction Inbound -Protocol TCP -LocalPort 2140 -Action Block
ufw
sudo ufw deny 2140/udp
iptables
sudo iptables -A INPUT -p udp --dport 2140 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2140 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2140' -Direction Inbound -Protocol UDP -LocalPort 2140 -Action Block

Related ports

2138unbind-cluster2139ias-auth2141ias-admind2142tdmoip

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