Re: What is "/24" in front of the IP number?

["S. Jonah Pressman" <jonah () istar ca>]

Fabio:

24 is the subnet mask of 255.255.255.0 (a full class 'C')

You may want to clip and save the following table:

16 - 255.255.0.0
17 - 255.255.128.0
18 - 255.255.192.0
19 - 255.255.224.0
20 - 255.255.240.0
21 - 255.255.248.0
22 - 255.255.252.0
23 - 255.255.254.0
24 - 255.255.255.0
25 - 255.255.255.128
26 - 255.255.255.192
27 - 255.255.255.224
28 - 255.255.255.240
29 - 255.255.255.248
30 - 255.255.255.252
31 - 255.255.255.254
32 - 255.255.255.255

Regards,
Jonah

Fabio Losnak wrote:

> Nowadays I'm working with firewall linux, and I'm
> configuring one in a client organization. I found in
> the script who apply the rules of the firewall
> (IPCHAINS) the follow lines:
>
> INT0="eth0"
> IP0="192.168.1.125/24"
> NET0="192.168.1.0"
>
> What is "/24" in the IP number?
> Can I put two networks in the same variable? Exemplo:
> NET0="192.168.1.0,192.168.10.0" It's correct?
>
> Thank's
>
> Fabio
>
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--

S. Jonah Pressman
President
NCS Data Inc.
Thornhill, Ontario, Canada
jpressman () bigfoot com

------------ 'ome is where you hang your @ -----------------



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