Re: How efficient is mounting /usr ro?

2003-10-18 Thread Matt Zimmerman
On Thu, Oct 16, 2003 at 11:08:46PM +0200, Bernd Eckenfels wrote: > In article <[EMAIL PROTECTED]> you wrote: > > A read-only /usr is not a security measure. > > Depends on your definition og it-security. It reduces downtime, prevents > some admin and software failures and therefore is a security

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Matt Zimmerman
On Fri, Oct 17, 2003 at 06:26:01PM +0200, Bernd Eckenfels wrote: > And to reply to myself: > > Information Security - As defined by ISO-17799, information security is > characterized as the preservation of: > > * Confidentiality - ensuring that information is accessible only to > those

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Michael Stone
On Sat, Oct 18, 2003 at 04:05:22AM +0200, Goswin von Brederlow wrote: Mounting stuff read-only also prevents filesystem corruption in case the system does crash A quiescent filesystem isn't going to be corrupted in a system crash. You need to have metadata inconsistencies caused by filesystem

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Goswin von Brederlow
Michael Stone <[EMAIL PROTECTED]> writes: > On Sat, Oct 18, 2003 at 04:05:22AM +0200, Goswin von Brederlow wrote: > >Mounting stuff read-only also prevents filesystem corruption in case > > the system does crash > > > A quiescent filesystem isn't going to be corrupted in a system crash. > You ne

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Russell Coker
On Sat, 18 Oct 2003 23:36, Goswin von Brederlow wrote: > Michael Stone <[EMAIL PROTECTED]> writes: > > A quiescent filesystem isn't going to be corrupted in a system crash. > > You need to have metadata inconsistencies caused by filesystem activity > > before you can get corruption. > > Which you g

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Bernd Eckenfels
In article <[EMAIL PROTECTED]> you wrote: > Anyway perhaps we should get a new mailing list debian-security-de for the > German meaning of security. Then the rest of us can discuss crypto, MAC, and > other things that match the English meaning of the word. Very funny. Personally I feel you are

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Bernd Eckenfels
In article <[EMAIL PROTECTED]> you wrote: > In the IT field, "security" refers specifically to unauthorized use, as in > "security guard", and "security system". It does not, in general, refer to > the more generic definitions of "security", as in "security blanket", > "securities and exchange com

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Thomas Ritter
Hey all, no jihad please, there are times to couple intruder/vandalism security and safety, and there are times to look at both concepts as distinct. To use the distinct definition, safety includes security, as not-secured data is not safe, and security without safety measures makes no sense. P

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Russell Coker
On Sun, 19 Oct 2003 03:44, Bernd Eckenfels wrote: > In article <[EMAIL PROTECTED]> you wrote: > > Anyway perhaps we should get a new mailing list debian-security-de for > > the German meaning of security. Then the rest of us can discuss crypto, > > MAC, and other things that match the English mean

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Daniel B.
Matt Zimmerman wrote: > > On Fri, Oct 17, 2003 at 06:26:01PM +0200, Bernd Eckenfels wrote: > > > And to reply to myself: > > > > Information Security - As defined by ISO-17799, information security is > > characterized as the preservation of: > > > > * Confidentiality - ensuring that informat

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Michael Stone
On Sat, Oct 18, 2003 at 04:05:22AM +0200, Goswin von Brederlow wrote: Mounting stuff read-only also prevents filesystem corruption in case the system does crash A quiescent filesystem isn't going to be corrupted in a system crash. You need to have metadata inconsistencies caused by filesystem acti

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Goswin von Brederlow
Michael Stone <[EMAIL PROTECTED]> writes: > On Sat, Oct 18, 2003 at 04:05:22AM +0200, Goswin von Brederlow wrote: > >Mounting stuff read-only also prevents filesystem corruption in case > > the system does crash > > > A quiescent filesystem isn't going to be corrupted in a system crash. > You ne

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Russell Coker
On Sat, 18 Oct 2003 23:36, Goswin von Brederlow wrote: > Michael Stone <[EMAIL PROTECTED]> writes: > > A quiescent filesystem isn't going to be corrupted in a system crash. > > You need to have metadata inconsistencies caused by filesystem activity > > before you can get corruption. > > Which you g

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Bernd Eckenfels
In article <[EMAIL PROTECTED]> you wrote: > Anyway perhaps we should get a new mailing list debian-security-de for the > German meaning of security. Then the rest of us can discuss crypto, MAC, and > other things that match the English meaning of the word. Very funny. Personally I feel you are

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Bernd Eckenfels
In article <[EMAIL PROTECTED]> you wrote: > In the IT field, "security" refers specifically to unauthorized use, as in > "security guard", and "security system". It does not, in general, refer to > the more generic definitions of "security", as in "security blanket", > "securities and exchange com

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Thomas Ritter
Hey all, no jihad please, there are times to couple intruder/vandalism security and safety, and there are times to look at both concepts as distinct. To use the distinct definition, safety includes security, as not-secured data is not safe, and security without safety measures makes no sense. P

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Russell Coker
On Sun, 19 Oct 2003 03:44, Bernd Eckenfels wrote: > In article <[EMAIL PROTECTED]> you wrote: > > Anyway perhaps we should get a new mailing list debian-security-de for > > the German meaning of security. Then the rest of us can discuss crypto, > > MAC, and other things that match the English mean

Re: How efficient is mounting /usr ro?

2003-10-18 Thread Daniel B.
Matt Zimmerman wrote: > > On Fri, Oct 17, 2003 at 06:26:01PM +0200, Bernd Eckenfels wrote: > > > And to reply to myself: > > > > Information Security - As defined by ISO-17799, information security is > > characterized as the preservation of: > > > > * Confidentiality - ensuring that informat