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Port 1668 (netview-aix-8)

IANA assigns port 1668 to netview-aix-8.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
netview-aix-8 TCP netview-aix-8 - -
netview-aix-8 UDP netview-aix-8 - -

Check what is listening on port 1668

Linux: is anything listening on TCP 1668?
sudo ss -tlnp 'sport = :1668'
Linux: UDP 1668
sudo ss -ulnp 'sport = :1668'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1668
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1668 '
Windows (Command Prompt)
netstat -ano | findstr :1668
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1668 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1668
From Windows
Test-NetConnection HOST -Port 1668
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1668

Block port 1668 in the firewall

ufw
sudo ufw deny 1668/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1668 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1668 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1668' -Direction Inbound -Protocol TCP -LocalPort 1668 -Action Block
ufw
sudo ufw deny 1668/udp
iptables
sudo iptables -A INPUT -p udp --dport 1668 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1668 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1668' -Direction Inbound -Protocol UDP -LocalPort 1668 -Action Block

Related ports

1666netview-aix-61667netview-aix-71669netview-aix-91670netview-aix-10

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