What ports should I open in firewall with adsl connection

hi i want to know about ports and want to block unecessary ports which can cause to attack of trojan virus or other services
i m using single ip address dsl connection(with network card) one conect to dsl modem and one for lan , i m using winxp internet conection firewall enable and then nav2003 and plus blackice server protection which ports can i block for security purpose or which purpose are very dangerous if they are open ...

 

Block all of the 64,000+ ports that you don't need.

Browser needs port 80 open for http.
Email for send and receive needs ports 25 & 110 open.

 

security issues

hi news i m beginner don't know so much will u gave me some good base info website regardings ports blocking in firewall
and 64,000+ i didn't get it how i block can u use blackice to block these ports from 1-64,000 m i right plz bit explain thanx
k another issuse i want to discuess i m using dsl connection
i have cellpipe modem with 2 network card and one switch
using operating system winxp by my defaut internetsetting is
connect by lan with 2 network adapter one connect with the isp and one connect to network... what's the configuration or setting
of connection with my isp i can't connect by dialup connection ..
so i use local area connection and what is hyperterminal..
will u expalin how to make a secure connection with my isp and secure server i will apprecaite thanx
cellpipe dsl cell 50A
switch
2 network card
winxp os

 

Are you running any services? lilke a web server or something? Do you want to be able to connect to your PC from the internet? If not anything of the above then block all of them.

 

which port should i block

no i m not using webserver just internet connection sharing on network and then i want to know about these ports what are
the funtion of these ports can i block them all
udp=135,137,138,445
tcp=135,139,389,445,593,636
if i block my connection still work or will cause of some problem
tell me about more information about ports which are cause by
secuirty risk ...

 

Ports are used for different programs to comunicate with the 'net. If any program that is accesible through some port on your pc is in any way vulnerable to some sort of attack - that means a security risk. To check your system for sec. holes you can use a tool called nessus www.nessus.org.

If you want to know what each port is usually used for there is a very nice site called www.google.com which can give you LOADS of information on that

 

Nice answer b1nary.

z4u - we will work with you on any problem you have.

But this sort of thing where you want to be spoon fed general information that you can easily search up is a waste of time.

Locking the thread.