User:Scott/04

Networking

Home Page      user:scott
Tech Support   user:scott/02
Dir & Files    user:scott/03
Network        user:scott/04
Troubleshoot   user:scott/05
Laptops        user:scott/06
Resources      user:scott/07

Reset Modem and Router

Unplug Modem and Router
Reset Modem and Router (paper clip)
Reboot Machine

Browser Off-line?

Command-line - Troubleshoot

Adapter or Onboard

lspci

lspci - Ethernet controller: Broadcom Corporation NetXtreme BCM5752 Gigabit Ethernet PCI Express (rev 01)

lsusb

lsusb - Bus 001 Device 003: ID 13b1:0026 Linksys

DHCP

ifconfig

ifconfig

eth0  Link encap:Ethernet  HWaddr 00:17:08:5f:dc:73  
      inet addr:192.168.1.8  Bcast:192.168.1.255  Mask:255.255.255.0

wlan0 Link encap:Ethernet  HWaddr 00:18:39:1d:31:d0  
      inet addr:192.168.1.7  Bcast:192.168.1.255  Mask:255.255.255.0

iwconfig

iwconfig

wlan0  IEEE 802.11bg  ESSID:"Karen's Wireless Network"  
       Mode:Managed  Frequency:2.437 GHz  Access Point: 00:18:01:FE:AB:AC

Ping

ping localhost 127.0.0.1

ping gateway route -n

ping 74.125.225.48 (google.com)

DNS

Dig well.com (DNS NS + A records no MX records)

ping well.com
traceroute well.com (if installed)

Network Tools

System -> Administration -> Network Tools

Devices Tab

loopback Interface (lo) 
Protocol IPv4 - 127.0.0.1
Hardware address: Loopback
 
Ethernet Interface (eth0)         
Protocol IPv4  - 192.168.1.x
Hardware address: 00:17:08:5f:dc:73

Wireless Interface (wlan0)         
Protocol IPv4  - 192.168.1.x
Hardware address: 00:17:08:5f:dc:73

Ping Tab

ping 127.0.0.1

Netstat Tab

Determine gateway 192.168.1.x
ping gateway
ping 74.125.225.48 (google.com)

Lookup Tab - DNS Records

lookup 208.17.81.205 (well.com)
lookup well.com (default information)
lookup well.com (Mailbox Exchange)
 

Traceroute Tab

traceroute 74.125.225.48 (google.com)
traceroute google.com
traceroute 208.17.81.205 (well.com)
traceroute well.com