[CentOS] Simple way to banish IP addresses ?

nate centos at linuxpowered.net
Mon Oct 12 21:36:43 UTC 2009


Amos Shapira wrote:
> There is an iptables geoip module to allow you to specify countries. I
> never used it thought.

I love linux, been using it for about 14 years but a good firewall it
does not make..

http://www.openbsd.org/faq/pf/tables.html

"A table is used to hold a group of IPv4 and/or IPv6 addresses. Lookups
against a table are very fast and consume less memory and processor time
than lists. For this reason, a table is ideal for holding a large group of
addresses as the lookup time on a table holding 50,000 addresses is only
slightly more than for one holding 50 addresses
[..]
Tables can also be populated from text files containing a list of IP
addresses and networks:

    table <spammers> persist file "/etc/spammers"

    block in on fxp0 from <spammers> to any
[..]
Tables can be manipulated on the fly by using pfctl(8). For instance, to add
entries to the <spammers> table created above:

    # pfctl -t spammers -T add 218.70.0.0/16"

--

Myself I'd be interested in seeing a iptables system running
with 50,000 rules for matching against.


nate





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