iptables with alias again

iptables with alias again

[Jeppe Sørensen]

Hello
If I have a interface with e.g. 3 alias
eth0
eth0:0
eth0:1
eth0:2

will this following rules apply on only eth0 and not eth0:0, eth0:1 and
eth0:2 or will it apply on all of them

iptables -A INPUT -i eth0 --dport 80 -j ACCEPT
iptables -A INPUT -i eth0 -j DROP

e.g If I get a packet on eth0:1 will the packet get ACCEPT if it is for port
80 or do I have to make a rule for all the alias where I use the alias ip
instead of the -i eth0 option?


Jeppe Sorensen

Re: iptables with alias again

[Antony Stone]

On Monday 07 October 2002 6:41 pm, Jeppe Sørensen wrote:

> Hello
> If I have a interface with e.g. 3 alias
> eth0
> eth0:0
> eth0:1
> eth0:2
>
> will this following rules apply on only eth0 and not eth0:0, eth0:1 and
> eth0:2 or will it apply on all of them
>
> iptables -A INPUT -i eth0 --dport 80 -j ACCEPT
> iptables -A INPUT -i eth0 -j DROP

It will apply to all of them.

Antony.

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I can confidently state that you will be very lucky indeed
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Iptables tutorial

[Bishop]

Hello all,

        I'm a newbie to the linux world. I download red hat 8.. I notice to
setup a firewall you have to use iptables. Does anyone know a good site or
url that I may take a look at. I need something simple that I could
understand, since I'm a newbie , something like "firewall for dums" ....

Thank you all for your help.

Re: Iptables tutorial

[Antony Stone]

On Monday 07 October 2002 8:22 pm, Bishop wrote:

> Hello all,
>
>         I'm a newbie to the linux world. I download red hat 8.. I notice to
> setup a firewall you have to use iptables. Does anyone know a good site or
> url that I may take a look at. I need something simple that I could
> understand, since I'm a newbie , something like "firewall for dums" ....

I recommend Oskar Andreason's tutorial at:

http://iptables-tutorial.frozentux.net

Antony.

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The customer gets to pick any two out of three.