Automaticaly
detect
ISA
Server
In
order
to
use
the
use
the
"Automatic
detect
ISA
server"
setting
in
the
Firewall
Client
Options
you
need
to
make
some
changes
in
ISA,
DHCP
and
DNS
on
the
server.
For
more
information
how
to
do
this
see
Configuring
Automatic
Discovery
for
ISA
Server
Clients.
Once
you
have
done
this
you
don't
need
to
turn
off
the
Firewall
client
anymore
when
the
Laptop
is
not
connected
to
the
SBS
Lan.
As
soon
as
the
Laptop
is
connected
to
the
SBS
Lan
it
will
discover
the
ISA
server
automatically.
A
default
setup
of
SBS
2000
will
create
the
003
router
option
in
the
DHCP
options
what
means
that
each
user
that
connects
using
DHCP
is a
SecureNat
client
by
default.
There
are
two
ways
of
propagating
the
autodiscovery
details
for
a
client.
The
first
one
is
with
DNS
and
because
of
the
SBS
has
all
the
stuff
running
on
one
machine
that
does
not
work
to
well.
The
second
way
is
using
DHCP
to
send
autodiscovery
information
to
the
clients.
First
set
autodiscovery
in
ISA
to
port
85
or
any
other
port
you
do
not
use.
If
you
want
to
see
what
is
on
port
85
before
you
enter
the
information
in
ISA
type
netstat
-na
|
find
":85"
from
the
command
prompt.
To
configure
DHCP
for
automatic
discovery
of
ISA
Server:
- Click Start, point to Programs, point to Administrative Tools, and then click DHCP.
- In the console tree, right-click the applicable DHCP server, click Set Predefined Options, then click Add.
- Click Add.
- In Name, type WPAD.
- In Code, type 252.
- In Data type, select String and then click OK.
- In String, type: http://Computer_Name:AutoDiscoveryPortNumber/Wpad.dat where Computer_Name is the fully qualified domain name of the ISA Server computer or array and AutoDiscoveryPortNumber is the port number on which auto-discovery information is published. This port is either the outgoing Web request port number or an additional port used for automatic discovery publishing.
- Right-click Server options and then click Configure options. (Do not forget this)
- Verify that Option 252 check box is selected. (Do not forget this)
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