Installation guide

LMU Users Guide
V1.0.6 December 10 2009
Copyright ©CalAmp DataCom Inc 2009
- 57 - CalAmp Proprietary & Confidential
The current IP address for PULS is 207.71.209.248.
For this example, the IP range used by your office is 166.143.185.65 thru 166.143.185.90 and
the IP range used by your data hosting facility is 172.90.80.240 thru 172.90.81.50
10
.
To set up an appropriate access list you would use the following commands:
PULS:
AT$APP PARAM 1281,3,207.71.209.248
Office:
AT$APP PARAM 1281,2,166.143.185.255
Data Center:
AT$APP PARAM 1281,1,172.90.255.255
One question that should pop to mind here is why we began with index 3 instead of 0. This
was because the default IP address is stored in index 3, since we wanted to limit access; we
needed to make sure that the default value was over-written or deleted.
Keep in mind that the Access IP Address list also controls the LMU’s ability to react to
Acknowledgements. If the LMU receives an acknowledgement from a server that is not on
its Access IP Address list, then it will ignore that acknowledgement and attempt to re-deliver
the message.
8.3
The Remote Host IP Address list is similar to the access list, in that it limits the LMU’s
ability to talk to certain IP addresses. In this case, the Remote Host IP Address list controls
which address a Host Device (i.e. laptop or PDA) can get to when connected to the LMU
via a Dial-Up Networking session. The idea here is to restrict an end-users ability to do
things like browse the web or check email so as not to run up excessive data charges.
Remote Host IP Address List
The Remote Host IP Address list is controlled by Parameter 1282 and contains 4 Indices (0
– 3). Each Index defines a new IP address and, like the Access IP Address list, an octet of
255 indicates a wild-card value. The Remote Host IP Address list has one entry by default
stored in Index 0. This is 255.255.255.255 to allow access to any remote IP addresses.
We will use the same IP ranges above for this example under the assumption that your office
and data center are hosting an IP based application that the end user needs access to. (For
instance, a POP3 mail server and SMTP server).
As a reminder, the IP range used by your office is 166.143.185.65 thru 166.143.185.90 and
the IP range used by your data hosting facility is 172.90.80.240 thru 172.90.81.50
11
.
10
With the exception of the PULS address, these IPs were chosen at random.
11
With the exception of the PULS address, these IPs were chosen at random.