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Port 1907 (intrastar)

IANA assigns port 1907 to intrastar: IntraSTAR.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
intrastar TCP IntraSTAR Peter Schoenberger -
intrastar UDP IntraSTAR Peter Schoenberger -

Check what is listening on port 1907

Linux: is anything listening on TCP 1907?
sudo ss -tlnp 'sport = :1907'
Linux: UDP 1907
sudo ss -ulnp 'sport = :1907'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1907
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1907 '
Windows (Command Prompt)
netstat -ano | findstr :1907
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1907 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1907
From Windows
Test-NetConnection HOST -Port 1907
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1907

Block port 1907 in the firewall

ufw
sudo ufw deny 1907/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1907 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1907 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1907' -Direction Inbound -Protocol TCP -LocalPort 1907 -Action Block
ufw
sudo ufw deny 1907/udp
iptables
sudo iptables -A INPUT -p udp --dport 1907 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1907 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1907' -Direction Inbound -Protocol UDP -LocalPort 1907 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.