[CentOS] Optimizing CentOS for gigabit firewall

Timo Schoeler timo.schoeler at riscworks.net
Fri Dec 18 20:23:38 UTC 2009


> after quick search in google:
> 
> http://postfactum.pl.ua/pf/
> 
> I will test to patch latest linux kernel with pf.
> What do you thing?

Get OpenBSD. Honestly -- all the porting stuff of relatively
kernel-close stuff is just braindead.

Timo

>  >sadas sadas wrote:
>  >
>  >> I can't find information is there linux or BSD distribution with effective
>  >> firewall that uses optimized algorithm to store hundreds of IPs and to
>  >> forward huge traffic. Any idea?
>  >
>  >Hundreds?
>  >
>  >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 be used in the
>  >following ways:
>  >
>  >    * source and/or destination address in filter, NAT, and redirection rules.
>  >    * translation address in NAT rules.
>  >    * redirection address in redirection rules.
>  >    * destination address in route-to, reply-to, and dup-to filter rule
>  >options."
>  >
>  >nuff said ?
>  >
>  >I love linux, I've been using it for almost 15 years now, I absolutely
>  >hate iptables(and ipchains, and ipfwadm). By contrast I absolutely
>  >hate everything about OpenBSD except for pf(which I love, ipfw and
>  >ipf aren't too bad either, at least for the era), so I use OpenBSD
>  >for firewalls, and linux for everything else.
>  >
>  >nate


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