On Sun, 2008-03-16 at 18:06 -0500, Les Mikesell 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. > > > > I don't see my reply in that thread, but it should need an OUTPUT line > corresponding to each PREROUTING entry. I have this working on a lot of > machines sending tcp port 80 to a server on 8080, so I know it works > with TCP. Have you tried a simple case to see if you have the syntax > right? There may be some quirks for udp or cifs. ---- you took 2 shots in it actually... https://www.redhat.com/archives/fedora-list/2007-December/msg01231.html https://www.redhat.com/archives/fedora-list/2007-December/msg01240.html Yes, note that in your first link (I think it was the first link), your suggestion was to add a rule for OUTPUT packets corresponding to PREROUTING packets too. Craig