I want to use port 60000 for a confined application that is not postgrey.
However port 60000 is "owned by" postgrey and I can't seem to get past that.
I don't want to add SELinux policy that allows my app to use postgrey's port,
I want my app to think the port is myapp_port_t.
Is there a way to free port 60000 from postgrey?
[root@domingo install]# netstat -an | grep 60000
[root@domingo install]# semanage port -l | grep 60000
postgrey_port_t tcp 60000
[root@domingo install]# /usr/sbin/semanage port -d -t postgrey_port_t -p tcp 60000
/usr/sbin/semanage: Port tcp/60000 is defined in policy, cannot be deleted
[root@domingo install]#
Thanks,
Brian
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On Wed, Sep 23, 2009 at 09:35:40AM -0700, Brian Ginn wrote:
I want to use port 60000 for a confined application that is not postgrey.
However port 60000 is "owned by" postgrey and I can't seem to get past that.
I don't want to add SELinux policy that allows my app to use postgrey's port,
I want my app to think the port is myapp_port_t.
Is there a way to free port 60000 from postgrey?
No easy way no, the port is declared in the corenetwork source policy which is compiled in the base module. You cannot alter/remove policy that is defined in base without editing rebuilding the whole thing.
You would have to get the selinux-policy.src.rpm corresponding to what you have installed, prep it (apply patch), Than in corenetwork.te.in remove the declaration for the particular port , rebuild and reinstall it.
But why not share the port with postgrey? Only one service can bind to it at a time anyways. Other objects get shared all the time.
[root@domingo install]# netstat -an | grep 60000
[root@domingo install]# semanage port -l | grep 60000
postgrey_port_t tcp 60000
[root@domingo install]# /usr/sbin/semanage port -d -t postgrey_port_t -p tcp 60000
/usr/sbin/semanage: Port tcp/60000 is defined in policy, cannot be deleted
[root@domingo install]#
Thanks,
Brian
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On 09/24/2009 02:32 AM, Dominick Grift wrote:
On Wed, Sep 23, 2009 at 09:35:40AM -0700, Brian Ginn wrote:
I want to use port 60000 for a confined application that is not postgrey.
However port 60000 is "owned by" postgrey and I can't seem to get past that.
I don't want to add SELinux policy that allows my app to use postgrey's port,
I want my app to think the port is myapp_port_t.
Is there a way to free port 60000 from postgrey?
No easy way no, the port is declared in the corenetwork source policy which is compiled in the base module. You cannot alter/remove policy that is defined in base without editing rebuilding the whole thing.
You would have to get the selinux-policy.src.rpm corresponding to what you have installed, prep it (apply patch), Than in corenetwork.te.in remove the declaration for the particular port , rebuild and reinstall it.
But why not share the port with postgrey? Only one service can bind to it at a time anyways. Other objects get shared all the time.
[root@domingo install]# netstat -an | grep 60000
[root@domingo install]# semanage port -l | grep 60000
postgrey_port_t tcp 60000
[root@domingo install]# /usr/sbin/semanage port -d -t postgrey_port_t -p tcp 60000
/usr/sbin/semanage: Port tcp/60000 is defined in policy, cannot be deleted
[root@domingo install]#
I agree, your best choice is to just let your app user postgrey_port_t
Thanks,
Brian
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