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Port 3494 (ibm3494)

IANA assigns port 3494 to ibm3494: IBM 3494.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ibm3494 TCP IBM 3494 Jeffrey Pilch -
ibm3494 UDP IBM 3494 Jeffrey Pilch -

Check what is listening on port 3494

Linux: is anything listening on TCP 3494?
sudo ss -tlnp 'sport = :3494'
Linux: UDP 3494
sudo ss -ulnp 'sport = :3494'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3494
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3494 '
Windows (Command Prompt)
netstat -ano | findstr :3494
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3494 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3494
From Windows
Test-NetConnection HOST -Port 3494
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3494

Block port 3494 in the firewall

ufw
sudo ufw deny 3494/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3494 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3494 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3494' -Direction Inbound -Protocol TCP -LocalPort 3494 -Action Block
ufw
sudo ufw deny 3494/udp
iptables
sudo iptables -A INPUT -p udp --dport 3494 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3494 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3494' -Direction Inbound -Protocol UDP -LocalPort 3494 -Action Block

Related ports

3492tvdumtray-port3493nut3495seclayer-tcp3496seclayer-tls

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