Test If a Port Is Reachable on Linux
Tries a TCP connection and reports whether it opened, was refused or timed out. Fill in the details below to get the exact command.
- Free
- No Sign-Up
- Runs in Your Browser
Test If a Port Is Reachable
nc -zv -w 5 example.com 443
Tries a TCP connection and reports whether it opened, was refused or timed out.
Linux Command Generator
The command
Commandnc -zv -w 5 example.com 443
CategoryNetwork
Works OnUbuntu, Debian, AlmaLinux, Rocky Linux
Tries a TCP connection and reports whether it opened, was refused or timed out.
Linux Commands
Check Disk SpaceFind the Largest DirectoriesFind Large FilesCheck Inode UsageShrink the systemd JournalList Open PortsCount Connections per IPTest If a Port Is ReachableTrace the Route to a HostQuery a DNS RecordShow IP AddressesCheck a ServiceRestart a ServiceList Failed ServicesStart a Service at BootRead a Service's LogsShow Errors Since BootFollow a Log FileFind Failed SSH LoginsTop Processes by MemoryTop Processes by CPUFind What Is Using a PortCheck Memory UsageShow OS and KernelCheck Load and Uptime
Questions
How do I test if a port is reachable on Linux?
Run: nc -zv -w 5 example.com 443
Free Tools
More tools
Linux Command GeneratorReady-to-run commands for disks, networking, services, logs and diagnostics.Chmod CalculatorLinux file permissions in octal and symbolic form, both ways.Cron Expression GeneratorBuild a crontab schedule and see it in plain English with next run times.Firewall Rule GeneratorGenerate iptables, nftables and UFW rules for common server set-ups.
Run VMs for other people?
Frabs stops spam, scans and floods leaving your customers' VMs, before the abuse report lands.