On Sat, 16 Jul 2011, Ljubomir Ljubojevic wrote: > To: CentOS mailing list <centos at centos.org> > From: Ljubomir Ljubojevic <office at plnet.rs> > Subject: Re: [CentOS] firewall? > > Keith Roberts wrote: >> So I guess I could configure my single NIC Centos 5.6 >> machine connected to a 4 port ADSL router to act as the >> external Gateway for other machine on the LAN side of the >> router, possibly using NAPT on the Centos box? > > Yes, you can do that. You can also use it as a proxy server. > > When I said "firewall", I meant as firewall for the network, facing > outside of the local network. There were people who would bring public > (or semi-public, from ISP) IP to the switch and then hook up all PC's to > that switch and use 2 subnets, one that ISP provided and one for the > local LAN, all on the same switch, to save on hardware. That is not safe > and not wise. > > Having firewall, as a software, running on the PC/server is good > practice, sometimes even in the local environment, if you use it in the > network that "external" people will hook up their PC's to and you have > important data on it. Rare cases, but do exist. Better safe then sorry. OK. Thanks for confirming that Ljubomir! Regards, Keith ----------------------------------------------------------------- Websites: http://www.karsites.net http://www.php-debuggers.net http://www.raised-from-the-dead.org.uk All email addresses are challenge-response protected with TMDA [http://tmda.net] -----------------------------------------------------------------