Solved

Can I reserve a port in Linux

Posted on 2011-09-28
6
1,073 Views
Last Modified: 2012-05-12
Can I reserve a port for a application so other application should ignore it?

Let me tell you the scenerio:
On few Linux server an application is not listening on port 1002 because we are mounting 50+ nfs shares through the fstab file and one remote connection is using this port.

netstat -natp | grep "1002"
tcp        0      0 xx.xx.xx.xx:1002            xx.xx.xx.xx:2049            ESTABLISHED -

Could anybody suggest me a way through remote nfs share can ignore the 1002 so that my application work perfectly.

0
Comment
Question by:upanwar
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 23

Expert Comment

by:savone
ID: 36718025
I am guessing you can start the application BEFORE you mount the nfs shares and that should do it.

0
 
LVL 12

Author Comment

by:upanwar
ID: 36718071
Hey savone,

Thanks for your reply. While rebooting It will read the fstab file fisrt and then will start the services for selected run level.

Any other way to reserve port. I guess I can define in /etc/services but will it work? Have anybody tried before?

0
 
LVL 8

Expert Comment

by:eager
ID: 36816098
Do you need all NFS mounts to happen at boot-up?  If not, you might look at using automount to mount the NFS file systems when you access them.  See info on "autofs".  
0
Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

 
LVL 34

Accepted Solution

by:
Duncan Roe earned 500 total points
ID: 37005562
You cannot do this. Ports above 1000 are up for grabs, and assigned sequentially. Either make your application privileged so it can use a port below 1000 or have it use a much higher port number. Many high port numbers are in fact reserved - see assigned numbers but for the most part you can ignore these.
0
 
LVL 12

Author Comment

by:upanwar
ID: 37006128
Hi Duncan,

I already gave it a try... but I will try it again and let you know... the way you suggested is something what which I was looking.

I appriciate it.

0
 
LVL 12

Author Closing Comment

by:upanwar
ID: 37466283
This solution given me a idea but I couldn't implement it. I have opened a case with HP for the same.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Using 'screen' for session sharing, The Simple Edition Step 1: user starts session with command: screen Step 2: other user (logged in with same user account) connects with command: screen -x Done. Both users are connected to the same CLI sessio…
Linux users are sometimes dumbfounded by the severe lack of documentation on a topic. Sometimes, the documentation is copious, but other times, you end up with some obscure "it varies depending on your distribution" over and over when searching for …
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to get help with Linux/Unix bash shell commands. Use help to read help documents for built in bash shell commands.: Use man to interface with the online reference manuals for shell commands.: Use man to search man pages for unknown command…
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question