adding only port 1186 to mysqld connect

[Stephen Smalley]

On Mon, 2007-12-10 at 16:41 -0500, Johnny Tan wrote:
> I'm doing mysql clustering (aka NDB). It requires a mysqld 
> client to connect to the cluster management node on port 1186.
> 
> By default, SELinux disallows mysqld from making tcp 
> connections (except to port 3306, I think?, not sure).
> 
> To allow mysqld to connect to the management node, I ran 
> audit2allow on the denials and got this:
> allow mysqld_t port_t:tcp_socket name_connect;
> 
> But this rule seems *too* open. Ideally, I'd like it to only 
> be able to connect on port 1186.
> 
> Then I tried:
> semanage port -a -t mysqld_port_t -p tcp 1186

What does semanage port -l | grep 1186 show afterward?

What do you mean by "didn't work", i.e. same avc message repeated
afterward upon subsequent attempts to connect?

The command should cause the port to be treated with that type for all
subsequent permission checks, whether name_connect or name_bind.

> But this didn't work either. I think this just allows mysqld 
> to bind to port 1186. (Or maybe not. Because, even without 
> this rule, it's still able to bind to 1186 on the management 
> nodes. So maybe this means something else.)
> 
> 
> How would I accomplish adding ONLY port 1186 to what mysqld 
> can do a tcp connect to?
> 
> 
> p.s. Does this patch:
> http://www.redhat.com/archives/fedora-extras-commits/2007-November/msg00786.html
> 
> ... do what I'm trying to accomplish? I see 1186 is added to 
> the mysqld network ports.
> 
> But either way, since it's a recent commit against Fedora, 
> I'm guessing it will be some time before it gets into 
> RHEL-5. Actaully, do these types of SELinux targeted-policy 
> commits even get backported into RHEL? It's not really a 
> security patch, as such.
> 
> johnn
> 
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-- 
Stephen Smalley
National Security Agency