Which interface i need to assign ip filer rules?

I have three Ethernet adapter in my linux system.

eth0, eth1 , localhost

Which ethernet adapter i need to give the filtering rules?

Can someone explain elaborate with reasons?
jaisonshereenAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

torquedtechCommented:
Hi jaisonshereen,

you will want to enable the ip filter rules on the device that currently has the ethernet cable plugged into it.

We are only interested in 2 interfaces eth0, and eth1, loopback is not an interface we need to worry about for this question.

if you run "ifconfig" (depending on your version/flavor of linux)
look for the interface that has an ip address. That is the one you want to enable the filter rules on

if they both have ip addresses, please let me know and I will help instruct from there.
0
jaisonshereenAuthor Commented:
Sorry forgot to mention.

eth0 is for private ip
eth1 is for public ip

what will be my cable is linked ..private or public?
0
torquedtechCommented:
your public ip is the the one that you will want to filter (eth1)

your private ip we believe is secure so we will trust it, however, the public interface is where we want the filter so that it will block unwanted people from entering.

for example a house, public interface is front door, private interface is back door.
we let friends come in the back door because they are trusted, but we must filter people at the front door (public) becuase we do not know who they are

make sense?

Thanks
~Dan

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
jaisonshereenAuthor Commented:
yes.. so which interface will be the cable connected?
0
torquedtechCommented:
it will go to interface eth1
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Unix OS

From novice to tech pro — start learning today.