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Port 1541 (rds2)

IANA assigns port 1541 to rds2.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rds2 TCP rds2 Sudhakar Rajamannar -
rds2 UDP rds2 Sudhakar Rajamannar -

Check what is listening on port 1541

Linux: is anything listening on TCP 1541?
sudo ss -tlnp 'sport = :1541'
Linux: UDP 1541
sudo ss -ulnp 'sport = :1541'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1541
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1541 '
Windows (Command Prompt)
netstat -ano | findstr :1541
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1541 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1541
From Windows
Test-NetConnection HOST -Port 1541
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1541

Block port 1541 in the firewall

ufw
sudo ufw deny 1541/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1541 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1541 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1541' -Direction Inbound -Protocol TCP -LocalPort 1541 -Action Block
ufw
sudo ufw deny 1541/udp
iptables
sudo iptables -A INPUT -p udp --dport 1541 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1541 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1541' -Direction Inbound -Protocol UDP -LocalPort 1541 -Action Block

Related ports

1539intellistor-lm1540rds1542gridgen-elmd1543simba-cs

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