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Port 1950 (ismaeasdaqtest)

IANA assigns port 1950 to ismaeasdaqtest: ISMA Easdaq Test.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ismaeasdaqtest TCP ISMA Easdaq Test Stephen Dunne -
ismaeasdaqtest UDP ISMA Easdaq Test Stephen Dunne -

Check what is listening on port 1950

Linux: is anything listening on TCP 1950?
sudo ss -tlnp 'sport = :1950'
Linux: UDP 1950
sudo ss -ulnp 'sport = :1950'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1950
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1950 '
Windows (Command Prompt)
netstat -ano | findstr :1950
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1950 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1950
From Windows
Test-NetConnection HOST -Port 1950
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1950

Block port 1950 in the firewall

ufw
sudo ufw deny 1950/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1950 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1950 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1950' -Direction Inbound -Protocol TCP -LocalPort 1950 -Action Block
ufw
sudo ufw deny 1950/udp
iptables
sudo iptables -A INPUT -p udp --dport 1950 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1950 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1950' -Direction Inbound -Protocol UDP -LocalPort 1950 -Action Block

Related ports

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