need some small help with iptables

[der.hans]

Am 22. Aug, 2002 schwätzte technomage so:

> ok, I got most of the basics down.
> when i want to deny an ip or all of an ip block (last numbers only) I can do:
> iptables -A INPUT -s xxx.yyy.zzz.0/24 -j DROP
> and it takes care of the entire ip block.
>
> However, I want to block entire ranges hwere I have XX.YY.0.0 between
> xx.yy.0.0 and xx.yy.255.255. whats the netmask notation for this?

That's a slash-16, e.g. xx.yy.0.0/16.

Look for an explanation on using CIDR addresses. There should be several
explanations in HOWTOs on the LDP. Any book on networking published in the
last 5 years should also have info.

ciao,

der.hans
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