Strange netstat listing

[lavajumper]

(This was originally posted in Networking & Wireless)

This is something that's been bugging me for years. When I do a netstat -anutp, I get a number of entries like the ones here:


Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:41993 0.0.0.0:* LISTEN -
udp 0 0 0.0.0.0:2049 0.0.0.0:* -
udp 0 0 0.0.0.0:44209 0.0.0.0:* -


Note the PID being listed. I assume there is not anything 'wrong' as this has been happening on every Linux installation I've seen, It's just that a listen socket with no process id makes me nervous. Can anyone shed some light on this?

[The Cog]

(This was originally posted in Networking & Wireless)

This is something that's been bugging me for years. When I do a netstat -anutp, I get a number of entries like the ones here:


Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:41993 0.0.0.0:* LISTEN -
udp 0 0 0.0.0.0:2049 0.0.0.0:* -
udp 0 0 0.0.0.0:44209 0.0.0.0:* -


Note the PID being listed. I assume there is not anything 'wrong' as this has been happening on every Linux installation I've seen, It's just that a listen socket with no process id makes me nervous. Can anyone shed some light on this?

Normal users aren't allowed to see the command arguments of other users, I think. sudo netstat -anutp will show you the missing info.

[lavajumper]

Thanks for responding. I ran the command both sudo'd and as root, same result. I'm curious if anyone else gets similar entries?

[The Cog]

Thanks for responding. I ran the command both sudo'd and as root, same result. I'm curious if anyone else gets similar entries?

Odd. I gather port 2149 is reserved for NFS. Are you running NFS? I don't, so I can't tell if it is normal NFS behaviour.

[The Cog]

I found this with google - seems like it's normal behaviour:
http://lkml.indiana.edu/hypermail/linux/kernel/0101.0/0365.html