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Port 1501 (saiscm)

IANA assigns port 1501 to saiscm: Satellite-data Acquisition System 3.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
saiscm TCP Satellite-data Acquisition System 3 Bill Taylor -
saiscm UDP Satellite-data Acquisition System 3 Bill Taylor -

Check what is listening on port 1501

Linux: is anything listening on TCP 1501?
sudo ss -tlnp 'sport = :1501'
Linux: UDP 1501
sudo ss -ulnp 'sport = :1501'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1501
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1501 '
Windows (Command Prompt)
netstat -ano | findstr :1501
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1501 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1501
From Windows
Test-NetConnection HOST -Port 1501
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1501

Block port 1501 in the firewall

ufw
sudo ufw deny 1501/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1501 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1501 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1501' -Direction Inbound -Protocol TCP -LocalPort 1501 -Action Block
ufw
sudo ufw deny 1501/udp
iptables
sudo iptables -A INPUT -p udp --dport 1501 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1501 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1501' -Direction Inbound -Protocol UDP -LocalPort 1501 -Action Block

Related ports

1499fhc1500vlsi-lm1502shivadiscovery1503imtc-mcs

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