On Sun, 2008-03-16 at 23:21 +0100, mouss wrote:
> Craig White wrote:
> > On Sun, 2008-03-16 at 15:33 -0500, Les Mikesell wrote:
> >
> >> John R Pierce wrote:
> >>
> >>
> >>>> I am using open source Alfresco( alfresco.com ), written in java,
> >>>> which has own code for FTP, CIFS (running on tomcat apache and java).
> >>>> I need to run tomcat5 as root in order to achieve that alfresco will
> >>>> bind ftp cifs on privileged ports (21 , 135 ...).
> >>>>
> >>>> I am wondering, it is possible to allow user to bind on some
> >>>> privilleged port. Like having whole alfresco running under user
> >>>> alfresco and not root and able to bind on privileged ports?
> >>>>
> >>>>
> >>> the way thats conventionally done is by having a small SUID program
> >>> (with the S bit set) which is invoked from the main program and opens
> >>> the privileged socket, then hands it back to the unprivileged rest of
> >>> the program. I have no idea how you'd do this with java short of using
> >>> native code interfaces.
> >>>
> >>> that seems like a huge and very complex system, running that whole thing
> >>> as root would be a nightmare from a security audit perspective.
> >>>
> >> Another approach that may or may not work with Alfresco is to configure
> >> the application to use high-numbered ports instead of the standard ones,
> >> then use iptables to redirect connections to the standard port numbers
> >> to the ones where the application runs.
> >>
> > ----
> > you may recall that in December, I was faced with this very issue but on
> > the Fedora List...probably the wrong list since I'm actually using it on
> > a CentOS-5 system...
> >
> > https://www.redhat.com/archives/fedora-list/2007-December/msg01169.html
> >
> > and I suggest that you may recall because you participated in the
> > thread.
> >
> > I was never able to figure out how to redirect those ports...though I
> > would change in a heartbeat if I could figure out how that is done.
> >
>
> did you see:
> http://wiki.alfresco.com/wiki/File_Server_Configuration#Running_SMB.2FCIFS_from_a_normal_user_account
>
>
> In particular, the part that says:
> "
> For some reason the UDP forwarding does not seem to work, this affects
> the NetBIOS name lookups. To get around the problem you can either add a
> DNS entry matching the CIFS server name and/or add a static WINS
> mapping, or add an entry to the clients LMHOSTS file.
> "
>
> otherwise, would it be possible to run samba as a "proxy" on the server?
----
Alfresco creates a samba process from java and you have to have multiple
IP addresses and run samba restricted to one of them and java's samba
implementation on another. It's messy.
The issue of LMHOSTS or DNS didn't really matter since the probably
wasn't NetBIOS lookups. I could easily just use ip addresses but still
couldn't get replies.
I gave up on that struggle 3 months ago. In the end, this server isn't
exposed except to the internal LAN and I just ended up running tomcat as
root.
Craig
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