Re: Required firewall support

2005-03-25 Thread Steve Greenland
On 21-Mar-05, 12:39 (CST), David Weinehall <[EMAIL PROTECTED]> wrote: > On Sun, Mar 20, 2005 at 11:22:48AM -0600, Steve Greenland wrote: > > > > And that's what we do. But some other OSs (Solaris) do support strict > > multihoming with a config parameter, it would be nice if Linux did. > > netdev

Re: Required firewall support

2005-03-21 Thread Thomas Bushnell BSG
Joel Aelwyn <[EMAIL PROTECTED]> writes: > Either someone > cares enough to write (or adapt) the management tools and it gets included, > or they don't and it doesn't because nobody in their right mind would > deploy it in any widespread fashion. But the latter is already true, and irrelevant. -

Re: Required firewall support

2005-03-21 Thread Joel Aelwyn
On Sun, Mar 20, 2005 at 11:22:48AM -0600, Steve Greenland wrote: > On 19-Mar-05, 10:00 (CST), Matthias Urlichs <[EMAIL PROTECTED]> wrote: > > > > Umm, rp_filter is for rejecting packets whose *source* address is from the > > wrong network. > > Right. I know this. But what Joel was originally tal

Re: Required firewall support

2005-03-21 Thread David Weinehall
On Sun, Mar 20, 2005 at 11:22:48AM -0600, Steve Greenland wrote: > On 19-Mar-05, 10:00 (CST), Matthias Urlichs <[EMAIL PROTECTED]> wrote: > > > > Umm, rp_filter is for rejecting packets whose *source* address is from the > > wrong network. > > Right. I know this. But what Joel was originally tal

Re: Required firewall support

2005-03-21 Thread Sebastian Ley
* Wouter Verhelst wrote: > Note that some packages, directly or indirectly, build-depend on > packages containing daemons that will be started by default if > installed. In that light, a firewall really is required to keep things > safe. IMO most notably, because many users will hit that: KDE ->

Re: Required firewall support

2005-03-21 Thread Wouter Verhelst
On Thu, Mar 17, 2005 at 01:09:33PM +0100, Marc Haber wrote: > On Wed, 16 Mar 2005 20:39:48 -0700, Joel Aelwyn <[EMAIL PROTECTED]> > wrote: > >* The first rule of securing a machine exposed to the wilds is "Deny by > > default, allow by need". > > Which is pretty well accomplished by only running

Re: Required firewall support

2005-03-20 Thread Steve Greenland
On 19-Mar-05, 10:00 (CST), Matthias Urlichs <[EMAIL PROTECTED]> wrote: > > Umm, rp_filter is for rejecting packets whose *source* address is from the > wrong network. Right. I know this. But what Joel was originally talking about was rejection of packets on interface A that are destined for an a

Re: Required firewall support

2005-03-19 Thread Matthias Urlichs
Hi, Steve Greenland wrote: > On 18-Mar-05, 03:28 (CST), Blars Blarson <[EMAIL PROTECTED]> wrote: >> >Linux fails this. Even with forwarding disabled, it will accept packets >> >for an address on interface A via interface B. >> >> Enable rp_filter and it does reject such packets. >> >> echo 1 >/p

Re: Required firewall support

2005-03-18 Thread Thomas Bushnell BSG
Gunnar Wolf <[EMAIL PROTECTED]> writes: > I agree that any Debian architecture needs to provide basic networking > facilities, but I don't think firewalling is a real requirement. Yes, > of course, we expect users to actually _run_ this architecture, and > they will probably be connected to the ne

Re: Required firewall support

2005-03-18 Thread Gunnar Wolf
Joel Aelwyn dijo [Wed, Mar 16, 2005 at 08:39:48PM -0700]: > Consider: > > * SCC systems have buildds. > > * Buildds must be network accessible. > > * The first rule of securing a machine exposed to the wilds is "Deny by > default, allow by need". > > Therefore, a box which does not provide ba

Re: Required firewall support

2005-03-18 Thread Thomas Bushnell BSG
[EMAIL PROTECTED] (Marco d'Itri) writes: > On Mar 17, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > > > However, we are not expecting the DSA people to keep the system > > secure; SCC non-released arches don't need to provide developer > > machines. > I do not believe that this is limited to

Re: Required firewall support

2005-03-18 Thread Steve Greenland
On 18-Mar-05, 03:28 (CST), Blars Blarson <[EMAIL PROTECTED]> wrote: > >Linux fails this. Even with forwarding disabled, it will accept packets > >for an address on interface A via interface B. > > Enable rp_filter and it does reject such packets. > > echo 1 >/proc/sys/net/ipv4/conf/${dev}/rp_fil

Re: Required firewall support

2005-03-18 Thread Blars Blarson
In article <[EMAIL PROTECTED]> [EMAIL PROTECTED] writes: >On 17-Mar-05, 01:01 (CST), Joel Aelwyn <[EMAIL PROTECTED]> wrote: >> * The ability for an interface to receive, by default, only traffic that >> is destined for that interface. (Non-promiscuous mode; promiscuous mode >> availability is

Re: Required firewall support

2005-03-17 Thread Steve Greenland
On 17-Mar-05, 01:01 (CST), Joel Aelwyn <[EMAIL PROTECTED]> wrote: > * The ability for an interface to receive, by default, only traffic that > is destined for that interface. (Non-promiscuous mode; promiscuous mode > availability is a big plus, but not required from the OS point of view) Linu

Re: Required firewall support

2005-03-17 Thread Marco d'Itri
On Mar 17, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > However, we are not expecting the DSA people to keep the system > secure; SCC non-released arches don't need to provide developer > machines. I do not believe that this is limited to debian hosts. If an OS lacks the basic security feature

Re: Required firewall support

2005-03-17 Thread Joel Aelwyn
On Thu, Mar 17, 2005 at 07:14:27PM +0100, Marc Haber wrote: > On Thu, 17 Mar 2005 10:03:15 -0700, Joel Aelwyn <[EMAIL PROTECTED]> > wrote: > >On Thu, Mar 17, 2005 at 01:09:33PM +0100, Marc Haber wrote: > >> I am routinely running systems without any packet filtering capability > >> on the network,

Re: Required firewall support

2005-03-17 Thread Marc Haber
On Thu, 17 Mar 2005 10:03:15 -0700, Joel Aelwyn <[EMAIL PROTECTED]> wrote: >On Thu, Mar 17, 2005 at 01:09:33PM +0100, Marc Haber wrote: >> I am routinely running systems without any packet filtering capability >> on the network, and they are perfectly able to cope. They just only >> accept network

Re: Required firewall support

2005-03-17 Thread Thomas Bushnell BSG
Joel Aelwyn <[EMAIL PROTECTED]> writes: > If you have all of the filtering rule support, then why is this even an > issue? Write the user-space tool and you should be golden; you've got a > useable firewalling implementation. > > What's the problem? Who said there was a problem? I was asking ex

Re: Required firewall support

2005-03-17 Thread Joel Aelwyn
On Thu, Mar 17, 2005 at 01:09:33PM +0100, Marc Haber wrote: > On Wed, 16 Mar 2005 20:39:48 -0700, Joel Aelwyn <[EMAIL PROTECTED]> > wrote: > >* The first rule of securing a machine exposed to the wilds is "Deny by > > default, allow by need". > > Which is pretty well accomplished by only running

Re: Required firewall support

2005-03-17 Thread Joel Aelwyn
[ Please respect the list code of conduct; I don't request CCs, nor does ] [ my M-F-T get set as such. In other words, don't send them. ] On Thu, Mar 17, 2005 at 12:16:27AM -0800, Thomas Bushnell BSG wrote: > Joel Aelwyn <[EMAIL PROTECTED]> writes: > > > Fine, if you want to get ped

Re: Required firewall support

2005-03-17 Thread Marc Haber
On Thu, 17 Mar 2005 13:52:23 +0100, Florian Weimer <[EMAIL PROTECTED]> wrote: >* Marc Haber: >> I am routinely running systems without any packet filtering capability >> on the network, and they are perfectly able to cope. They just only >> accept network connections for needed services. > >This is

Re: Required firewall support

2005-03-17 Thread Florian Weimer
* Marc Haber: > I am routinely running systems without any packet filtering capability > on the network, and they are perfectly able to cope. They just only > accept network connections for needed services. This is a bit dangerous because any invocation of "apt-get install" or "apt-get upgrade" c

Re: Required firewall support

2005-03-17 Thread Marc Haber
On Wed, 16 Mar 2005 20:39:48 -0700, Joel Aelwyn <[EMAIL PROTECTED]> wrote: >* The first rule of securing a machine exposed to the wilds is "Deny by > default, allow by need". Which is pretty well accomplished by only running needed services. A port without a services is an implicit "deny". >Sorr

Re: Required firewall support

2005-03-17 Thread Thomas Bushnell BSG
Joel Aelwyn <[EMAIL PROTECTED]> writes: > Fine, if you want to get pedantic, the following is a bare minimum of > capabilities I would expect from any network processing on a 'real' > (non-toy) network stack, where 'network stack' means everything between > hardware driver and delivery of data to

Re: Required firewall support

2005-03-17 Thread Thomas Bushnell BSG
Joel Aelwyn <[EMAIL PROTECTED]> writes: > For buildds, since I don't run one as either local or DSA admin, I couldn't > tell you offhand. I know what I'd *expect* them to be doing, as general > guidelines, which closely resembles what I do on servers I deploy facing > the net, but I don't know wha

Re: Required firewall support

2005-03-16 Thread Joel Aelwyn
On Wed, Mar 16, 2005 at 07:49:23PM -0800, Thomas Bushnell BSG wrote: > Joel Aelwyn <[EMAIL PROTECTED]> writes: > > > If you really want this fixed, I suggest finding someone who is well versed > > in both network security issues and Internet protocol fundamentals (not > > just TCP or even just IP,

Re: Required firewall support

2005-03-16 Thread Joel Aelwyn
On Wed, Mar 16, 2005 at 07:50:13PM -0800, Thomas Bushnell BSG wrote: > Joel Aelwyn <[EMAIL PROTECTED]> writes: > > > * SCC systems have buildds. > > > > * Buildds must be network accessible. > > > > * The first rule of securing a machine exposed to the wilds is "Deny by > > default, allow by n

Re: Required firewall support

2005-03-16 Thread Thomas Bushnell BSG
Joel Aelwyn <[EMAIL PROTECTED]> writes: > * SCC systems have buildds. > > * Buildds must be network accessible. > > * The first rule of securing a machine exposed to the wilds is "Deny by > default, allow by need". Exactly which firewalling are the existing buildds doing? (I'm asking for inf

Re: Required firewall support

2005-03-16 Thread Thomas Bushnell BSG
Joel Aelwyn <[EMAIL PROTECTED]> writes: > If you really want this fixed, I suggest finding someone who is well versed > in both network security issues and Internet protocol fundamentals (not > just TCP or even just IP, but all the other lovely beasties out there) and > convincing them it's worth

Re: Required firewall support

2005-03-16 Thread Joel Aelwyn
On Wed, Mar 16, 2005 at 03:13:16PM -0800, Thomas Bushnell BSG wrote: > [EMAIL PROTECTED] (Marco d'Itri) writes: > > > On Mar 16, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > > > > > One of the conditions for SCC is "fully functioning Unix, including > > > DNS and firewall support." What spec

Re: Required firewall support

2005-03-16 Thread Thomas Bushnell BSG
Adrian Bunk <[EMAIL PROTECTED]> writes: > It seems what makes Thomas suspicous is that of all current ports of > Debian (Linux, *BSD, GNU/Hurd), the only one that might be affected is > GNU/Hurd - this requirement is therefore either void for all current > Debian ports or it was meant specifica

Re: Required firewall support

2005-03-16 Thread Adrian Bunk
On Thu, Mar 17, 2005 at 12:24:00AM +0100, Marco d'Itri wrote: > On Mar 17, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > > > > > One of the conditions for SCC is "fully functioning Unix, including > > > > DNS and firewall support." What specifically is intended by "firewall > > > > support"?

Re: Required firewall support

2005-03-16 Thread Marco d'Itri
On Mar 17, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > > > One of the conditions for SCC is "fully functioning Unix, including > > > DNS and firewall support." What specifically is intended by "firewall > > > support"? > > I think that simple ACLs are the bare minimum. > Ok, can you point

Re: Required firewall support

2005-03-16 Thread Thomas Bushnell BSG
[EMAIL PROTECTED] (Marco d'Itri) writes: > On Mar 16, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > > > One of the conditions for SCC is "fully functioning Unix, including > > DNS and firewall support." What specifically is intended by "firewall > > support"? > I think that simple ACLs are

Re: Required firewall support

2005-03-16 Thread Marco d'Itri
On Mar 16, Thomas Bushnell BSG <[EMAIL PROTECTED]> wrote: > One of the conditions for SCC is "fully functioning Unix, including > DNS and firewall support." What specifically is intended by "firewall > support"? I think that simple ACLs are the bare minimum. > Those who felt this necessary, ca