Installed a new version of the router_check.sh script at eslope5.
It does a dns lookup on the destination hosts that are passed to the
script to be sure that the router's DNS isn't returning an address
of 192.168.0.1 for those hosts.
The hope is that the script will be able catch the problem at eslope5 last night,
and power cycle the router.
I'll watch it for a day before installing it on the other stations.