I was made to understand that trojans and flooders have ports, where can i get the full list of this trojans and flooders and their ports numders so that i can block them with iptables.

thanks.

It is not possible to do so. You will grow old blocking all the trojans . There are ports required for software to work but which trojans also use. What would you do then? Its not possssible to block off port 80 ? Sure no work would enter through port 80 but no one would be able to reach your webserver either.

Heres a list of the ports though for a guide:
http://www.iana.org/assignments/port-numbers

However what you should rather be doing is allowing all you want on your firewall/router/blocking device and blocking everything else with a "deny all" rule right at the end.

Cheers
Arvind

I was made to understand that trojans and flooders have ports, where can i get the full list of this trojans and flooders and their ports numders so that i can block them with iptables.

thanks.

No such thing as a "full list". Any port that is open is liable for attack. Rather than trying to figure out what to exclude you should figure out what to include. That is to say use iptables to turn off ALL ports then modify it to turn on only those you need. So if you don't have a web application (e.g. Apache) on the box there is no reason to open port 8080 or 443. If you do then you'd open the specific port needed.

Also be sure to turn off unecessary/insecure services. (e.g. telnet - use ssh instead, or ftp - use scp/sftp instead).

Am I going crazy, or are posts 1 and 3 exactly the same?

I suspect a moderator merged duplicate postings.

Of course the fact that you are seeing the same post twice doesn't prove you aren't crazy.

Indeed they are, here's the notice to the OP: Please post your thread in only one forum and only once. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. These threads have been merged because they are duplicates.