Hi. Why is it important to hide ping responses? I'm coming up to
speed on all these details, so any info would be most appreciated!
Also, on another newsgroup, the advice I got seemed to point to this:
As long as I have a modem/router that supports NAT (mine does--Westell
327W), and I keep my anti-virus and Adaware software up to date, the
risk of problems will be minimal for my home system. Does this sound
right?
As to Cable vs. DSL, it really came down to price for me. I don't need
the speed of cable, and DSL comes to about $100 cheaper a year. Are
there other reasons to choose Cable?
Thanks!
Ken
When a hacker pings your address randomly, and your computer returns a
ping response, it gives the hacker some very important information: he
knows that your address is valid. He will then concentrate his
efforts on breaking into your machine. DSL modems do not hide ping
responses. Not only that, but they leave open ports everywhere, which
only increases the chances a hacker will be able to take over your
machine. It appears that the Network Operating System support
personnel believe that you should have open ports. The same is true
for Satellite operators. Cable leaves no open ports, and just passes
the packets through to your machine.
While DSL may be cheaper than Cable, it is SLOWER than cable. While
most Cable speeds are routinely around 3-5mbps, DSL is almost
uniformly 1.5mbps (or less -- many times it is less). As an example,
I was only 2000 feet from the DSLAM, yet my DSL transmissions speeds
were ROUTINELY less than 1mbps (more often being 128-256kbps). This
is only if you have the closest distance to the Phone Company. The
further you are away from the Phone Company's DSLAM, the more the
speed of transmission drops off. If you are at the maximum distance
(10,000-15,000feet) from the DSLAM, that 1.5mb might drop to 128kbps.
In addition to the distance from the DSLAM, the quality of the signal
will also affect DSL transmission speeds. The more "noise" on the
line, the lower your speed will be. Also, there is the 13% TCP
overhead, which takes away from your actual speed. I admit that this
TCP overhead will also exist in Cable, but with speeds in excess of
3mbps, this is barely noticeable
While you may be getting a "cheaper" price for the DSL, you certainly
aren't getting a better "value" for the money. In its favor, Cable
speed does not drop off with distance. On the otherhand, Cable speed
DOES drop off with the number of machines which are currently attached
and active in the neighborhood loop.
To give DSL a little credit, the better (e.g. "newer" your house
wiring is, the higher the transmission rates will be (because there
will be less "noise" on the line). So in a newer house or apartment
building, the DSL transmission rate will usually be much better than
in an old house or apartment building, which have older copper wiring.
I say "usually" because, as I have already mentioned, DSL transmission
speed takes a hit with the distance you are from the DSLAM.
In addition, many Cable companies are trying to vigorously compete
with DSL providers in pricing, so the price difference (maybe $10 per
month more for higher bandwidth on Cable than DSL) is not as
noticeable anymore.
I do admit that it is important to have at least a good software
firewall and up-to-date antivirus suite, and being behind a NAT router
PLUS a software firewall will ALMOST ensure that your machine is
hidden from the Net (if you have a local address, which would not be
directly exposed to the Net.) However, if your NAT firewall returns
ping responses and exposes ports to the Net, some of that hiddenness
is lost. Sadly, most software firewalls do not hide ping responses
(no matter how you have it configured) if you are behind a NAT router
which DOES return ping responses. The NAT firewall will override the
software firewall.
Anyway, having used DSL, Cable, and Satellite, I prefer the speeds and
reliability of Cable.
'Nuff said.
Donald L McDaniel
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