Windows
Networking
1. To quickly
reset your NIC back to DHCP with no manual settings, run this command:
netsh int ip reset all
2. To quickly
generate a text summary of your system, run this command:
systeminfo
| more
3. To see all
network connections your client has open, run this command:
net use
4. To see your
routing table, run either of these commands:
route print
netstat -r
5. Need to run a
trace, but don’t have Netmon or Wireshark, and aren’t allowed to install either
one? Run this command:
netsh trace start capture=yes tracefile=c:\capture.etl
netsh trace stop
6. To quickly open
a port on the firewall, run this command, changing the name, protocol, and port
to suit. This example opens syslog:
netsh firewall set portopening udp 161 syslog enable all
7. To add an entry
to your routing table that will be permanent, run the route add command with
the –p option. Omitting that, the entry will be lost at next reboot:
route add 0.0.0.0 mask 0.0.0.0 172.16.250.5 –p
8. Here’s a simple
way to see all open network connections, refreshing every second:
netstat –ano 1
9. You can add a |
findstr value to watch for only a specific connection, like a client
ip.addr or port:
netstat –ano | findstr 216.134.217.20
10. You can use the
shutdown to shutdown or reboot a machine, including your own, in a simple
scheduled task like this:
shutdown –r –t 0 –m \\localhost
