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Topic: DSL and Linux Virtual Server project, Cannot hide network interfaces

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garcelj

Group: Members
Posts: 6
Joined: May 2005

Posted: May 24 2005,20:23

Hi everyone,

I need help with a project I'm working on.

I have setup two boxes with an HD install of DSL and XAMPP.

Everything has been configured for each box to serve as a Real Server as outlined in the Linux Virtual Server Project.

The LVS configuration that is being used is LVS-DR.

Part of the instructions include hiding the local interface on the Real Servers using the following commands:

#hiding interface lo:110, will not arp
echo "1" >/proc/sys/net/ipv4/conf/all/hidden
cat /proc/sys/net/ipv4/conf/all/hidden
echo "1" >/proc/sys/net/ipv4/conf/lo/hidden
cat /proc/sys/net/ipv4/conf/lo/hidden

These commands need to be executed so that there will not be an ARP issue.

I have tried to execute the commands but found out that the directories are all non writeable. I also tried to change the directory permissions to make them writable using the command 'sudo chmod +w dirname' without success.

Any suggestions?

Thanks in advance!

p.s. I just now realized that this is in the wrong forum. Can this be moved to Networking?

skaos

Group: Members
Posts: 430
Joined: April 2004

Posted: May 25 2005,10:07

You probably need the g (group) and x (execute) options as well:
sudo chmod g+wx dirname
This assumes that the group ownership of the directory is the same as for your user. If not:
chgrp groupname dirname

garcelj

Group: Members
Posts: 6
Joined: May 2005

Posted: May 25 2005,12:26

Hi skaos,

I tried 'sudo chmod g+wx /proc' and that worked. I then tried to do the same to the /proc/sys directory but that did not change the write permission.

The owner and group are boot set to root.

This project is very close to working. If I can get the directories /proc/sys/net/ipv4/conf/all & /proc/sys/net/ipv4/conf/lo to be writeable and add the file 'hidden' this setup that I'm working on would work.

If I am not able to do this, there is a kernel module that can be downloaded as source called noarp that would do the same thing, only I would need kernel sources to compile it. See this site for details -- Masarlabs - NoArp

garcelj

Group: Members
Posts: 6
Joined: May 2005

Posted: May 25 2005,16:28

Solution found!

After trying several commands to make the /proc/sys/net/ipv4/conf/ directories writeable and getting nowhere, I decided to do another search on the internet.

Using the search term '/proc/sys/net/ipv4/conf/all' on Google, I found this post.

It referenced another article that said between kernel versions 2.2.x and 2.4.x and higher, the file /proc/sys/net/ipv4/conf/all/hidden had changed to /proc/sys/net/ipv4/conf/all/arp_ignore.

Changing my commands to use arp_ignore instead of hidden did the trick and the LVS setup is now working.

Thanks for help everyone!

3 replies since May 24 2005,20:23

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