I am running Debian testing. When I reboot and plug in my network cable, I am able to ping external servers and machines on my LAN. Basically, it all just works with the network cable plugged in.
When I reboot and turn on the wifi (ie there is a switch on my laptop to turn on/of wifi) and have the network cable disconnected, I can ping external sites but not internal machines. I get the message Destination Host Unreachable. If I then plug in the network cable (and turn off wfi) I am able to ping both internal and external servers. If I now disconnect the cable and turn on wifi again, I can ping both external and internal servers.
/etc/network/interfaces
auto eth0
iface eth0 inet static
address 192.168.25.150
netmask 255.255.255.0
gateway 192.168.25.1
dns-nameservers 68.105.28.12 68.105.29.12 68.105.28.11
gateway 192.168.25.1
allow-hotplug wlan0
iface wlan0 inet dhcp
I looked at resolv.conf and route for the two scenarios -
1. Reboot into cable connected network -
root@orca:/home/mark# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default gateway 0.0.0.0 UG 0 0 0 eth0
link-local * 255.255.0.0 U 1000 0 0 eth0
192.168.25.0 * 255.255.255.0 U 0 0 0 eth0
root@orca:/home/mark# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 68.105.28.12
nameserver 68.105.29.12
nameserver 68.105.28.11
2. Reboot into wifi
root@orca:/home/mark# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default gateway 0.0.0.0 UG 0 0 0 wlan0
link-local * 255.255.0.0 U 1000 0 0 wlan0
192.168.25.0 * 255.255.255.0 U 0 0 0 eth0
192.168.25.0 * 255.255.255.0 U 0 0 0 wlan0
root@orca:/home/mark# cat /etc/resolv.conf
nameserver 192.168.25.1
I could change interfaces to have a static IP for wifi, and it would work when I reboot. However, for that occasional visit to Starbucks my wifi would not work.
What do I need to do to make my wifi work both at home and on the road?
Thanks,
Mark