4.2. Checking your TCP/IP settings
The recommended IP address of the SAR router is 192.168.0.1 (default
address is 192.168.7.1 but previous section shows how to change this)
on subnet mask 255.255.255.0. In simple terms this means that, in
order for your PC to talk to the router, the IP address of your PC’s
should be in the range from 192.168.0.2 to 192.168.0.254. If you
already use TCP as your default network protocol and you don’t use IP
settings in the required range then you will have to either permanently
alter the settings of your computers to suite or change the default
address of the router. If you wish to alter the settings of all your PC’s
to suite then it is probably best to ask the person in charge of your
network setup to do this for you
Goto network settings (Start/Settings/Control Panel/Network).
Scroll down the list of network settings until you find the entry
showing TCP/IP. There may be several such entries (see example); the
one you need is the entry associated with your network card. Select it
and then click on Properties:
Click on ‘Specify an IP
address’ and, on the
first screen (IP Address) enter a suitable address (e.g. as above) and the
subnet mask. You need to ensure that each PC on your LAN has an IP
address which is both unique and within the subnet range of the routers
address e.g. in the range 192.168.0.2 to 192.168.0.254 (assuming the IP
address for the router is
192.168.0.1 as described
above).
Next, for each PC you
must enter a Gateway
address. This is the
address of the router and
tells your PC where to
send internet TCP
requests:
Finally you must setup
DNS Configuration on
each PC:
Each PC MUST have
the address for DNS entered in it’s TCP setting. If your PC doesn’t have
a DNS setting then it will not be able to find any internet sites so it’s
important that you have this set correctly!
On the DNS Configuration screen you must Enable DNS and then enter a
Host name; this can be anything you like – just a made up name will do!
If you’ve followed the instructions given above then your router will
automatically be doing a feature called ‘DNS relay’. With DNS relay you
tell your clients (PC’s) to send their DNS requests to the router (as
against sending your requests through the router to the ISP’s DNS). The
router then forwards those requests to the true DNS and then passes any
replies back to the client. Therefore, you need to ‘add’ the address of the
router to the DNS list.
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