DJA wrote:
Ralph Shumaker wrote:
It depends on what DSL modem you have. Some have built-in firewall
and NAT capability, some just firewall, and some nothing. Since you
didn't say anything about a discrete hardware firewall, I assume you
don't have one between your DSL modem and your computer. If this is
the case, and you are not at least running a Iptables or similar, and
your modem has no firewalling capability, I strongly recommend you
get one.
dsl-line
DSL-2320B
ethernet-cable
[Insert hardware firewall here]
Not necessary after all. See below.
eth0
So I either need to learn IPtables or put in a firewall device?
You need to so something, because unless you are running at least a
software firewall, you're wide open. Lucky for you you're not running
Windows or you'd most certainly be owned by now or worse.
After looking at the data sheet for your modem I see it does indeed
include a firewall. It's probably not fancy (I haven't looked at the
manual), but since it at least does Stateful Packet Inspection (SPI), it
should be good enough.
So no need to install a separate hardware firewall unless the modem's
lacks features you need. However, I recommend you still run a software
firewall (e.g. Iptables) on any and all boxes within your LAN for
additional security.
--
Best Regards,
~DJA.
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