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Port 3537 (ni-visa-remote)

IANA assigns port 3537 to ni-visa-remote: Remote NI-VISA port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ni-visa-remote TCP Remote NI-VISA port Sinnadurai Dharshan -
ni-visa-remote UDP Remote NI-VISA port Sinnadurai Dharshan -

Registry dates for this port: registered 2002-07.

Check what is listening on port 3537

Linux: is anything listening on TCP 3537?
sudo ss -tlnp 'sport = :3537'
Linux: UDP 3537
sudo ss -ulnp 'sport = :3537'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3537
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3537 '
Windows (Command Prompt)
netstat -ano | findstr :3537
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3537 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3537
From Windows
Test-NetConnection HOST -Port 3537
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3537

Block port 3537 in the firewall

ufw
sudo ufw deny 3537/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3537 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3537 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3537' -Direction Inbound -Protocol TCP -LocalPort 3537 -Action Block
ufw
sudo ufw deny 3537/udp
iptables
sudo iptables -A INPUT -p udp --dport 3537 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3537 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3537' -Direction Inbound -Protocol UDP -LocalPort 3537 -Action Block

Related ports

3535ms-la3536snac3538ibm-diradm3539ibm-diradm-ssl

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