ftp chroot

[Giorgos Keramidas]

Antonis Malihutsakis <linux at malihu.gr> writes:

> Psaxnw na brw pws mporw na kanw chroot se kapoious ftp xrhstes.
> p.x o xrhsths user1 me home dir /www/user1 otan kanei login na mhn
> mporei na dei to filesystem, otan dhladh kanei change directory / na
> phgainei sto /www/user1.
> An ginetai 8a h8ela na na ma8w kai ti xreiazetai gia na mporei autos o
> xrhsths na ektelei entoles opws ls, cp, klp. kai na mporei na allazei to
> password tou kanontas telnet.

An oi xrhstes exoun kai shell access me allo tropo sto mnxavnma, p.x. me
telnet/ssh, tote den exei vonma va kaveis to ftp sou chroot'ed.  Baltous
prosektika se groups, ftiakse ta permissions sta arxeia twv upoloipwv
directories tou sustnmatos, kane to sustnma sou alliws pio secure.  Giati
ektos apo tnv extra fasaria me ta /bin, /lib, ld.so, klp. to chroot'ed ftp dev
8a sou prosferei tipota parapano apo mia kali gnosi tou ti xreiazetai ena
dynamically-loaded elf executable gia na treksei swsta.

-- 
Giorgos Keramidas, <keramida at ceid.upatras.gr>
"What we have to learn to do, we learn by doing." [Aristotle]
--
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