Login or Register to Ask a Question and Join Our Community


Red Hat

No process ID for listening ports

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Operating Systems Linux Red Hat No process ID for listening ports
# 1  
Old 10-08-2009
No process ID for listening ports
How can I have ports that are listening without processes being associated with them?

Code:
root@ldv002 # netstat -ltnup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name
tcp        0      0 0.0.0.0:5600                0.0.0.0:*                   LISTEN      1949/esmd
tcp        0      0 0.0.0.0:6305                0.0.0.0:*                   LISTEN      3651/xinetd
tcp        0      0 127.0.0.1:199               0.0.0.0:*                   LISTEN      5408/snmpd
tcp        0      0 0.0.0.0:34540               0.0.0.0:*                   LISTEN      -
tcp        0      0 0.0.0.0:1006                0.0.0.0:*                   LISTEN      5488/rpc.statd
tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      3087/portmap
tcp        0      0 0.0.0.0:21                  0.0.0.0:*                   LISTEN      3669/vsftpd
tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      3694/sendmail: acce
tcp        0      0 :::22                       :::*                        LISTEN      3634/sshd
udp        0      0 0.0.0.0:514                 0.0.0.0:*                               3044/syslogd
udp        0      0 0.0.0.0:161                 0.0.0.0:*                               5408/snmpd
udp        0      0 0.0.0.0:49471               0.0.0.0:*                               5408/snmpd
udp        0      0 0.0.0.0:68                  0.0.0.0:*                               2892/dhclient
udp        0      0 0.0.0.0:59742               0.0.0.0:*                               -
udp        0      0 0.0.0.0:1000                0.0.0.0:*                               5488/rpc.statd
udp        0      0 0.0.0.0:1003                0.0.0.0:*                               5488/rpc.statd
udp        0      0 0.0.0.0:111                 0.0.0.0:*                               3087/portmap

I have also tried:
Code:
root@ldv002 # lsof -i tcp:5600
COMMAND  PID USER   FD   TYPE DEVICE SIZE NODE NAME
esmd    1949 root    4u  IPv4 338848       TCP *:esmmanager (LISTEN)
[/root]
root@ldv002 # lsof -i tcp:34540
[/root]
root@ldv002 # lsof -i tcp:59742
[/root]

Padow
# 2  
Old 10-09-2009
Code:
$ man netstat 
...
..
Active Internet connections (TCP, UDP, raw)
...
...
PID/Program name
       Slash-separated pair of the process id (PID) and process name of the process that owns the socket.  
       --program causes  this  column to  be  included.   You will also need superuser privileges to see this 
       information on sockets you donāt own.  This identification information is not yet available 
       for IPX sockets.
.....

Not sure !!
# 3  
Old 10-14-2009
These ports were actually part of NFS.

I added this to /etc/modprobe.conf to control the ports used so i can exclude them from scans:

options lockd nlm_tcpport=<PORT> nlm_udpport=<PORT>
Padow
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Ubuntu

PID of listening ports

I ran 'sudo netstat -ntpl' and got the following without PID tcp 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:38977 0.0.0.0:* LISTEN - tcp 0 0 0.0.0.0:34253 ... (3 Replies)
Discussion started by: tt77
3 Replies

2. UNIX for Advanced & Expert Users

Finding process that turned on ports

I have 2 identical solaris 10 servers that are simply apache servers, running a version of apache I installed. # uname -a SunOS wilber 5.10 Generic_147440-25 sun4u sparc SUNW,Sun-Fire-V245 I did a netstat on one of the servers and see 2 ports that are on. These are only on on one of the... (2 Replies)
Discussion started by: csross
2 Replies

3. AIX

Process running but not listening

Hello guys I am experiencing a very strange behavior on one of our AIX servers. We have an application with several processes that listen on several port numbers. Sometimes we receive complains that people cannot connect to the server on a specific port that is used by one the application... (6 Replies)
Discussion started by: abohmeed
6 Replies

4. UNIX for Dummies Questions & Answers

How do i list running process with the ports they are using?

How do i list the running process and also view the ports they are listening to at the same time? (3 Replies)
Discussion started by: mena
3 Replies

5. UNIX for Dummies Questions & Answers

Processes listening on Ports(Solaris)

Howdy Experts, This is my first post here and I am posting because I have not been able to find an answer for this question. How do you find out what process is listening on a given port? I do not have "lsof" available and how do we find this out without logging in as Root. I know that this... (5 Replies)
Discussion started by: KingaKoopa
5 Replies

6. Shell Programming and Scripting

Finding the process id of the process using the ports

Hi Any idea how to get the process id of the process using the ports lsof -i :portnumber does not work in my machine. I am on sun Solaris SPARC. Any suggestion is highly appreciated (1 Reply)
Discussion started by: kinny
1 Replies

7. Solaris

List TCP ports with process

Hello, One of our developers is asking for a command/script in Solaris similar to "netstat -anp" in Linux. He gave this output as an example: root@xxx:~# netstat -anp | grep LISTEN tcp 0 0 0.0.0.0:7937 0.0.0.0:* LISTEN 16082/nsrexecd tcp 0 ... (7 Replies)
Discussion started by: vimes
7 Replies

8. UNIX for Dummies Questions & Answers

What prot is a process listening on?

Hi, Bit of a newbie question . . . How can I detrimine what TCP port a particular process is listening on? TIA. (2 Replies)
Discussion started by: Le Badger
2 Replies

9. UNIX for Dummies Questions & Answers

unix process that frees ports

Hello, I know that there is a unix system process that checks periodically the ports and if it finds any zombies then it frees them (the period is set by a kernel parameter). Can anyone tell me the name of the process and the kernel parameter ? Thanks :) (2 Replies)
Discussion started by: FunnyCats
2 Replies

10. UNIX for Dummies Questions & Answers

TCP Listening Ports

Hello all, Can someone instruct me on how to change the listening port for ftp ( or any tcp service) from 21 to another port number? Thanks in advance.. -AJ (3 Replies)
Discussion started by: jacobsa
3 Replies
Login or Register to Ask a Question