Network Interface

Shortcuts

command to get to network adapters control panel in windows:

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ncpa.cpl

Network Interface Issues NIC

Check DHCP settings + assigned IP address Check Cables

Check for incorrectly uninstalled network adapters in device manager > show hidden devices then uninstall

Reset the TCP/IP stack with the following command: “netsh int IP reset” (will clear all network configuration)

If the issue is with NIC teaming this can be removed for all adapters with the command: “LbfoAdmin /Resetconfig”

Enable Ping using default network rule:

Enable the rule with powershell:

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Set-NetFirewallRule -DisplayName "Core Networking Diagnostics - ICMP Echo Request (ICMPv4-In)" -Enabled True

Enable Ping / ICMP using netsh

Use the following commands to set rule on windows firewall to allow ping on server

IPv4

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netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol="icmpv4:8,any" dir=in action=allow

IPv6

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netsh advfirewall firewall add rule name="ICMP Allow incoming V6 echo request" protocol="icmpv6:8,any" dir=in action=allow

Network info

Get password for wifi network from netsh:

Get saved networks:

• netsh wlan show profile

Get details for network with password in clear text:

• netsh wlan show profile key=clear

Get services that are bound to ports:

• netstat -ano

Interface configuration

Issues with default gateway? remove unwanted routes on network interface.

Find the routes:

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Get-NetRoute -AddressFamily ipv4

remove the routes with a destination prefix of 0.0.0.0 and next hop of 0.0.0.0

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Remove-NetRoute -InterfaceIndex  -DestinationPrefix "0.0.0.0/0" -NextHop "0.0.0.0" -PolicyStore Persistantstore

Remove routes to persist:

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netsh interface ipv4 delete route prefix=0.0.0.0/0 interface=Ethernet0

also:

route -p delete 0.0.0.0