Test TCP connection on Windows #

PS> Test-NetConnection google.com -port 80

ComputerName     : google.com
RemoteAddress    : 142.251.37.110
RemotePort       : 80
InterfaceAlias   : vEthernet (external)
SourceAddress    : 192.168.x.x
TcpTestSucceeded : True

Test TCP connection on Linux #

$ nc -zv google.com 80
Connection to google.com (142.251.37.110) 80 port [tcp/http] succeeded!

Generate TLS or CA certificates #

XCA Homepage

xca-2.9.0-win64.msi [25MB, local mirror]

Stretchly #

Stretchly Homepage

Stretchly-Setup-1.19.0.exe [142MB, local mirror]