Netsh.exe命令会覆盖现有的防火墙规则吗？

Question

I'm using a netsh command that add a firewall rule on windows 2012 r2 server.

My command is like this:

Netsh.exe advfirewall firewall add rule name="name" protocol="TCP" localport=1234 dir=in enable=yes action=allow

What happen if i already have a rule with another name and same localport and protocol?

My command will overwrite that rule or it will create another one on same port?

I've tried to find any documentation, but i've found nothing about that.

Answer 1

There is a PowerShell module called NetSecurity. You can make a statement in powershell which can tell if the rule already exist or not.

Get-NetFirewallRule you can use this command to discover which firewall rules are already defined.

https://docs.microsoft.com/en-us/powershell/module/netsecurity/?view=win10-ps