A live linux cd preconfigured to just do firewall duties (no gui, no other apps, minimal kernel, and no growing files/logs) could fit on a very very small image (even a floppy disk). So yes, the whole root fs image can be copied into RAM (along with initrd root). Even 256mb ram or less will suffice as long as the os image size can fit. No need for hard disk too. As long as there's no growing files/heavy IO, it can run for a very long time. IO is also very fast since its in ram (loading rules from text files), but you have cap your log files or implement circular logging so it won't grow and eat up what's left of the RAM.
On 8/17/07, Jarris Ruiz <[EMAIL PROTECTED]> wrote: > > try pfsense its cd bootable firewall and configurations stored in the usb > > On 8/16/07, jan gestre <[EMAIL PROTECTED] > wrote: > > > > > > > On 8/16/07, jepoy <[EMAIL PROTECTED]> wrote: > > > > > > hi guys, > > > can i get your feedback on these? one of my friends told me that he > > > saw this linux based firewall that was used in production. the firewall > > > system boots on a cd.it was customize to load the rules and maybe the > > > OS from the bootable cd, after loading you can remove the cd and its > > > working. anyone done these before ? is the OS loaded on the memory ? > > > > > > > > I had experienced with these before, firewall running on the CD although > > not Linux but still FOSS i.e. monowall and pfsense, all the configs are > > loaded to RAM or you can save it in a floppy or usb stick. > > > > Checkout RedWall, it's a linux based firewall that can do this > > functionality as well. > > > > > > > > -- > > http://jangestre.wordpress.com > > _________________________________________________ > > Philippine Linux Users' Group (PLUG) Mailing List > > [email protected] (#PLUG @ irc.free.net.ph) > > Read the Guidelines: http://linux.org.ph/lists > > Searchable Archives: http://archives.free.net.ph > > > > > _________________________________________________ > Philippine Linux Users' Group (PLUG) Mailing List > [email protected] (#PLUG @ irc.free.net.ph) > Read the Guidelines: http://linux.org.ph/lists > Searchable Archives: http://archives.free.net.ph > -- Marie Charisse L. Gascon http://www.chasys.net
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