recently switched to debian after years with windows, i am enjoying the experience, 
although at times i get frustrated - i know that is my fault and not my computer (or 
operating system - or linux - or debian - or yours)

my current dilemma is with ports:

understanding them, and working with them

i use a program called edonkey - which requires port(s) 4662, 4665, and 4661 (i don't 
think that last two are important as the first) to be open and available

using nmap i see that several ports are already open accepting connections - and these 
ports have certain programs or services assigned to them
(i don;t think that supplying the open ports is important - but i could be wrong)

while looking at "/etc/inet.dconf" and "/etc/services" i see that these programs 
and/or services have to be "declared" or "assigned" to a certain port number (or 
actually vice versa)
(side question: is my understanding of this false?)

i tried to input "edonkey" along with the corresponding port number inside the two 
aformentioned configurations files

i entered this into "/etc/inetd.conf":
edonkey       stream  tcp     nowait  amg     /usr/local/bin/edonkey/donkey0.50.1
(please use your imagination for the other two ports)

and this into "/etc/services":
edonkey       4662/tcp        edonkey       # edonkey
(again, your imagination is required)

i then rebooted (just to make sure it was read correctly (special reminder: i am new 
at this)) 

and the corresponding ports were not opened - or available (using nmap)

doing research on the web (mainly google - along with lists.debian.org - and some 
tldp.org) i come across information pertaining to iptables and ipchains, and other 
firewall information.

i dont have ipchains or iptables installed, so assigning them access would accomplish 
nothing (correct?)

so, my question (along with the inter-dispersed) and my assumption is i don't have a 
firewall running on my computer (from what i can tell - very bad - but please limit 
your response to what's coming up next), certain ports are in a closed state, although 
my declarations in the two configuration files seem(to me) to be correct.

do i need to start edonkey as a service to allow it access to listen to a port (using 
it in a certain runlevel and/or a symbolic link inside that specific runlevel)?
(and if so how would i do this)

is there another configuration file i should be editing?

does debian come with a firewall as default? from what i can tell it doesn't - and i 
don't remember selecting one from the initial install - and certainly don't remember 
downloading one using "apt-get"

if it doesn't how do i allow my computer to listen to a certain port - and allow 
access to this specific port(s).

--

if the above question (it might not seem like one) is too much of a pain to read (not 
knowing what i am doing doesn't help me ask a question in the best manner)

i'm assuming it can be summed up with this:

how do i allow my computer to "open a port" (listen on a port)

if you're answer is "some command pertaining to this firewall" - i don't have one 
installed

also - if you're response is to "read the ****ing manual" - specify which one (i have 
read inetd - but couldn't figure out another one that would apply)

i hope i've explained my question properly - i tried to give all the supplying and 
relative information - but if there is something i have missed - i will supply it

along with any information that you could provide me with, i would also like to 
recieve tips on asking questions - this way - when i come back (which i'm sure i'll 
do) i'll be able to ask in the most concise and compact manner possible, allowing 
those that would help me a better chance of understanding me, and allowing me a better 
way of presenting my problem

my pc specs:
(in case you need to know)

distro:         debian 3.0
kernel:         2.4.18-bf2.4
(anything else?)









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