| 1 |
-----BEGIN PGP SIGNED MESSAGE----- |
| 2 |
Hash: SHA512 |
| 3 |
|
| 4 |
> To be precise, the default rule shall be: Allow everything. |
| 5 |
> I simply want to keep programs like qmail-ldap, dovecot and so on |
| 6 |
> within their allowed limits. |
| 7 |
|
| 8 |
Hi Aiko, |
| 9 |
|
| 10 |
I hope I understood correctly, but if all you want is to ensure the |
| 11 |
limits of a few processes there are afaik two easy methods that do not |
| 12 |
require systemwide settings. |
| 13 |
|
| 14 |
1) You could try simply jail them into a chroot. This will keep the apps |
| 15 |
you want to have under greater control separated from the rest of the |
| 16 |
system and thus limits their damage-potential immensely. Just make sure |
| 17 |
that you chroot is secure and there is no way out. A great tool to help |
| 18 |
with this would be JailKit (http://olivier.sessink.nl/jailkit/) |
| 19 |
|
| 20 |
2) You can use the hardened sources to get access to GRSEC-enhancements. |
| 21 |
The option you'll need is called CONFIG_GRKERNSEC_AUDIT_GROUP. This will |
| 22 |
allow you to specify a gid to monitor. Simply make all the processes you |
| 23 |
want to thoroughly audit members of a special group (e.g. call it |
| 24 |
"untrusted"). Then activate all the special logging options you want. |
| 25 |
This can be very comprehensive and produce a LOT of logs. So be careful. |
| 26 |
You could also activate CONFIG_GRKERNSEC_SOCKET and specify another gid |
| 27 |
to restrict the usage of sockets. However this appears to be rather |
| 28 |
unlikely since you said you want to tighten your grip on applications |
| 29 |
holding a port. |
| 30 |
|
| 31 |
I think combining both of them would give you a good start in hardening |
| 32 |
your system the way you want it. |
| 33 |
|
| 34 |
If I understood your request in a wrong way, please let me know. |
| 35 |
|
| 36 |
Many Greetings |
| 37 |
Paul |
| 38 |
-----BEGIN PGP SIGNATURE----- |
| 39 |
Version: GnuPG v1.4.6 (GNU/Linux) |
| 40 |
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org |
| 41 |
|
| 42 |
iD8DBQFGIo2IaHrXRd80sY8RCv5PAKCzYt49Z0sVi992HRrFrCYGHvsrOACffXBj |
| 43 |
vbdfH7gTJbdHFf8Ee+vHx/w= |
| 44 |
=QM0W |
| 45 |
-----END PGP SIGNATURE----- |
| 46 |
-- |
| 47 |
gentoo-hardened@g.o mailing list |
Archives