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about firewalls and trojans

tonycooles

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Wednesday, December 15th 2004, 10:37am

about firewalls and trojans

im new in linux so im from windows (puagh) a world full of virus, worms, trojans and so on.

this is my question i use very often.. ok ok all the time a bittorrent client and as everyone knows this shows your IP well when i was using MS-$$$$$$ I had the tiny firewall that was working quite well stopping hundreds atacks everyday.

now im in linux and use bittorrent as well (and works quite much better)

ok ok my question do i have to be worried about worms and trojans? i was looking for in this forum but till the page 20 at least there is no reference to anything about firewalls or so

Thanks in advance

ops PS: i have knoppix 3.7 :) yeah yeah easy one but im newbie :wink:

mart_k

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Wednesday, December 15th 2004, 2:58pm

In Linux, worms and virusses are very seldom. But you can be attacked through open ports. For example, if you enabled your ssh-service and no firewall, somebody else can try to login and to modify you system. You can also be attacked through other services, such as apache, if it has a weakness.

So the best advice is to close as much ports as possible.

The standard firewall in linux is called iptables, and can be accessed through the command line. There are many frontends for it (but I don't know them by name). With this firewall, you can close the incoming ports.

Eriol

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Thursday, December 16th 2004, 1:43am

Look here:
http://expansa.sns.it/knetfilter/

But if you have time you can try to make your own script with your favourite editor. It's not too difficult.