How can I use an selinux unused port

[Daniel J Walsh]

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 at domingo install]# netstat -an | grep 60000
>>
>> [root at domingo install]# semanage port -l | grep 60000
>>
>> postgrey_port_t                tcp      60000
>>
>> [root at 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 at domingo install]#
>>
>>
>>
>>

I agree, your best choice is to just let your app user postgrey_port_t
>>
>>
>>
>> Thanks,
>>
>> Brian
>>
>>
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