Newbie: (unwanted) incoming traffice on static DSL line

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I am a newbie when it comes to this - I have a static IP DSL line,
running Trend Micro's firewall and a wireless Linksys router (for
roaming about my office/house with laptops.) On the router setup page
there is a list of incoming traffic (a mile long) that lists IP
addresses from around the world. The question is: how do I stop this?
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computer (I am assuming the firewall is protecting my computer--but you
know what happens when you ass/u/me!)

Anyway if someone could point me to some help on the following:
a) how do I block the incoming traffic? (with the caveat that I
sometimes want to connect to my office computer using tools like
b) how can I limit access (to my wireless network using the wireless
connection) to just the computers on my home/office PC?

Thanks for the help--I'm feeling very intruded upon...


Re: Newbie: (unwanted) incoming traffice on static DSL line says...
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Most NAT routers block inbound connections that your network has not
requested. So, if I were to try and connect to your computer from here,
the NAT router would stop me from getting past it since your computer
did not request my connection.

NAT Routers make great simple appliances to keep the unsolicited
internet users out of your network (even with a single PC you have a
network). These devices should not be confused with real firewalls, they
don't offer anywhere near the protection if any at all.

As for NAT Routers and outbound, well, lets just say the barn-door is
always open. With the exception of a few NAT routers, they all allow
anything out of your network. This means that if you were to have your
machine compromised, the malware on it could phone home and get
instructions or more malware and self install it on your computer.

As for blocking the connections, you can't, as long as you have a public
connection there will be attempts to connect - most of it is just
background chatter and can be ignored for the most part.

In most cases, unless you really understand security, your personal
firewall running on your computer won't do much to protect you, as you
control it, any mistake you make will possibly compromise your computer.

I hope you've secured your Wireless access - if not, most are in a
default setup, which means that anyone near enough can access your
network. Make sure that you read this:

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Re: Newbie: (unwanted) incoming traffice on static DSL line

on 11/20/2005 5:31 PM Leythos said the following:
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That link line wrapped for me and maybe for Regs.  Try the short one:

Re: Newbie: (unwanted) incoming traffice on static DSL line

John Hyde wrote:
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You have a couple of options depending on what type of router you have.
1) If the router is also a firewall and its in defualt configuration
you are going to be blocking the incoming traffic. The logs you are
talking about should state that traffic is blocked. If so then you
should not worry about the traffic too much.
2) Depending on what port the traffic is going to you might find that
you can configure your router to stop logging blocked traffic.
3) If your router is allowing the traffic then you have a problem and
will need to configure it to block all incoming taffic.
4) If your router is not a full hardware firewall then you may want to
consider upgrading it. I am assuming that your trend micro firewall is
a software one installed on your system you should not rely on software
firewalls as your main protection.

IT consultancy

Re: Newbie: (unwanted) incoming traffice on static DSL line

You will also want to set-up the following security on your wireless if
it is supported.

1) Limit connections to your wireless using mac address.
2) Use encryption the WPA if it supports it. If not then use WEP.

If you have not done this it is likely that your wireless is open and
anyone within range is able to connect to your internal network.

IT consultancy

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