who uses this port?

[Eugene Grosbein]

On 05.11.2015 14:20, Ben Woods wrote:
> On Wednesday, 4 November 2015, Andriy Gapon <avg at freebsd.org> wrote:
> 
>> $ sockstat -l | fgrep 631
>> ?        ?          ?     ?  tcp4   127.0.0.1:631         *:*
>>
>> $ nc -l 127.0.0.1 631
>> nc: Address already in use
>>
> 
> 
> I'm more curious as to why sockstat gives you question marks instead of the
> proper process details. Any ideas?

That's for sockets opened by kernel level such as NFS/RPC.