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Old 26th February 2012
ragnvaldf ragnvaldf is offline
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Default Running system in tmpfs or with readonly root

Hello! I currently use an old laptop with 768mb ram as my router running hardened gentoo.
Since I do not trust the old harddrive, I created an initrd that squashes the root filesystem onto tmpfs then runs off of that. This also has the added bonus that if the computer ever crashes(Or power is lost) I don't have to worry about a corrupt filesystem.

Now i'm considering switching to openbsd. Partly because i'm curious, and partly because keeping gentoo updated is a lot of work.

The only software I will use is: openvpn,sshd,squid(transparent if possible. Only used for caching),rsyslog(remote logging),ntpd,tmux,dhcpcd(or any alternative..) and finally cron.

How would you recommend I set this up? If I can't run the whole system in tmpfs, can I do it with read-only root? I'm also curious about running all the services in a guest os.
Any input is much appreciated. Thank you!
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Old 26th February 2012
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jggimi jggimi is offline
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Hello, and welcome.

My live media (link in .sig) run with read/only ISO9660 filesystems from CD/DVD, with six read/write Memory File Systems (MFS) mounted: /dev, /etc, /root, /var, /home, and /tmp. This is done with a modified /etc/rc script.

See mount_mfs(8) for details on creating "ramdisk" filesystems.
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Old 4th March 2012
ragnvaldf ragnvaldf is offline
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Thank you so much for the tip. Will check it out. All i'm missing is the time to rewrite my netfilter rules for use with pf.
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