- Verify that another computer can connect with this jack.
- ipconfig /all
- connections?
- ping 127.0.0.1
- ping self (get ip address from ipconfig)
- ping gateway
- ping dns server
- ping google
- If you can reach some remote hosts but not others, use
tracert (win)/traceroute (unix).
- Check Event Viewer logs: System, Application, Security.
- For laptop, check network device power management.
- Go to Network Connection Status. Check Support. Use Repair to reset network caches
- From cmd, run Network Diagnostics with
netsh diag gui.
- Task Manager Networking tab
- Find the relevant device in Network Connections and make sure it's not Disabled.
Window networking commands
arp -a # list all current arp entries
ipconfig/all # list network interfaces
ping some.computer.com # check if network is up
netstat -rn # look for default gateway
nslookup some.computer.com # check DNS entry
route print # show all local network routes
tracert 123.45.67.89 # trace routing to destination