Chapter
7
. How to…
Solwise SAR715PV ADSL Ethernet Router User’s Guide
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Next change the LAN address and subnet to the required values
(note that the Secondary IP Address allows you to run a separate
LAN subnet range on the same port – useful if you want to
configure ports forwarding or firewall settings for a separate LAN).
Then click on Apply. Please note that, once you change the LAN
address you will then have to immediately change the IP address of
your PC so you can ‘see’ the router again.
Finally save the configuration and reset the router.
7.3 Using your 715PV Router with fixed IP address
Most users will use their router with NAT enabled. This allows them to
‘share’ their internet connectivity across their whole network without
needing a block of static IP addresses from the ISP i.e. the ISP sees
the whole of your LAN as a single IP address and the router
automatically sorts out traffic to the
correct local clients:
However using NAT has it’s
advantages and disadvantages. The
advantages are it allows you to
easily run multiple PC’s through a
single user ISP account and it acts
as a natural firewall stopping
unsolicited incoming traffic. However
the disadvantage of NAT is that
some software needs the IP address
of the PC to be ‘exposed’ to the
outside world – this is just what NAT
stops! For some applications you
