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Port 260 (openport)

IANA assigns port 260 to openport: Openport.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
openport TCP Openport John Marland -
openport UDP Openport John Marland -

Check what is listening on port 260

Linux: is anything listening on TCP 260?
sudo ss -tlnp 'sport = :260'
Linux: UDP 260
sudo ss -ulnp 'sport = :260'
Linux / macOS: which process owns the port
sudo lsof -nP -i :260
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':260 '
Windows (Command Prompt)
netstat -ano | findstr :260
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 260 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 260
From Windows
Test-NetConnection HOST -Port 260
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 260

Block port 260 in the firewall

ufw
sudo ufw deny 260/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 260 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 260 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 260' -Direction Inbound -Protocol TCP -LocalPort 260 -Action Block
ufw
sudo ufw deny 260/udp
iptables
sudo iptables -A INPUT -p udp --dport 260 -j DROP
nftables
sudo nft add rule inet filter input udp dport 260 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 260' -Direction Inbound -Protocol UDP -LocalPort 260 -Action Block

Related ports

257set259esro-gen261nsiiops262arcisdms

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