What about it? Default Airio files don't do that, so it's something you have put in yourself... search your config files for "/pass"
indiaXXX:/home/lfs/insim# mono Airio.exe
Airio tracker v. 2.5.1 FREE by EQ Worry
Opening connection : TCP ERROR
********************************* Quit Airio *********************************
# ================================================================= #
# AIRIO LFS SERVER 1 CONNECTION FILE #
# ================================================================= #
# It is necessary to enter here data needed for connection to server.
# These are LFS server IP address, its InSim communication port,
# and the server password. Without correct data connection cannot
# be established.
HostAddr=127.0.0.1
HostPort=29969
HostPass=PASSWORD
# Optionally specify how many times per second are car data (speed,
# location) sent. Allowed values are 1, 2, 5, 10, or 20.
HostRate=10