Ping/URl Get Test

You can tag that host in the bb-hosts with NET:location and then add another bbtest-net running every 5 seconds and with $BBLOCATION defined to the same "location" tag defined in the bb-hosts file.

from man bb-hosts

NETWORK TEST SETTINGS
NET:location
This tag defines the host as being tested from a specific location. If bbtest-net sees that the environ-
ment variable BBLOCATION is set, it will only test the hosts that have a matching "NET:location" tag in the
bb-hosts file. So this tag is useful if you have more than one BBNET system, but you still want to keep a
consolidated bb-hosts file for all your systems.

Note: The "--test-untagged" option modifies this behaviour, see bbtest-net(1)

from man bbtest-net

USING MULTIPLE NETWORK TEST SYSTEMS
If you have more than one system running network tests - e.g. if your network is separated by firewalls - then is
is problematic to maintain multiple bb-hosts files for each of the systems. bbtest-net supports the NET:location
tag in bb-hosts(5) to distinguish between hosts that should be tested from different network locations. If you set
the environment variable BBLOCATION e.g. to "dmz" before running bbtest-net, then it will only test hosts that
have a "NET:dmz" tag in bb-hosts. This allows you to keep all of your hosts in the same bb-hosts file, but test
different sets of hosts by different BBNET systems.