Windows
Server troubleshooting checklist Troubleshooting loss of connectivity: [ ] Check all cable connections. [ ] Check TCP/IP stack by pinging loopback address. [ ] Check network connectivity by pinging another computer on the network. [ ] Check internetwork connectivity by pinging a computer on another subnet. [ ] Check IP address and default gateway settings. [ ] Check DNS and WINS settings for name resolution problems. [ ] Check proxy settings. [ ] Check security policies and authentication settings.